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<title cf:type="text"><![CDATA[ -->Special Culumn: Rare and Endangered Plants and Conservation Genetics]]></title>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Rediscovery, supplementary description, and discussion 
of the systematic position of the endemic Chinese 
species <i>Pilea menghaiensis</i>(Urticaceae)]]></title>
<link><![CDATA[http://gxzw.ijournals.cn/gxzwen/ch/reader/view_abstract.aspx?file_no=20250401&flag=1]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[<i>Pilea menghaiensis </i>C. J. Chen is an endemic species of the genus<i> Pilea</i> Lindl. within the family Urticaceae Juss., which is only distributed in the Dai Autonomous Prefecture of Xishuangbanna in Yunnan, China. This species has limited specimens and a lack of description of the female inflorescence in the <i>Flora Reipublicae Popularis Sinicae</i>. Furthermore, there is a scarcity of relevant studies on the chloroplast genome and phylogenetic relationships of this species. In this study, the complete chloroplast genome of <i>P. menghaiensis </i>was sequenced using high-throughput sequencing technology. The chloroplast genome data of <i>P. menghaiensis </i>were assembled and annotated. Phylogenetic trees of the genus <i>Pilea</i> were reconstructed based on the concatenated sequence matrix of chloroplast genome sequences, as well as the combined matrix of the ITS sequence and two chloroplast DNA regions(<i>trn</i>L-F and <i>rbc</i>L). Additionally, photographs and detailed descriptions of the pistillate inflorescence and achenes of <i>P. menghaiensis</i> were obtained. The results were as follows:(1)The complete chloroplast genome was 152 079 bp long, with a GC content of 36.62%, and features a typical quadripartite structure with a large single copy region(LSC)of 83 178 bp, a small single copy region(SSC)of 18 355 bp, and two inverted repeat regions(IRs)of 25 273 bp each.(2)A total of 132 genes, including 87 protein-coding genes, 37 tRNA genes, and 8 rRNA genes, were annotated, primarily distributed within the LSC and SSC.(3)<i>P. menghaiensis </i>belonged to the sect. <i>Verrucosae</i> L. F. Fu &amp; Y. G. Wei of <i>Pilea</i>, was phylogenetically close to <i>P. sinofasciata</i>, with which it shared similar morphological characteristics. This study enriches the genetic information of the chloroplast genome of <i>P. menghaiensis</i>, providing a basis for developing molecular markers and studying genetic diversity. It also serves as a reference for exploring species evolution within the genus <i>Pilea</i>.]]></description>
<pubDate>2025/4/30 10:07:56</pubDate>
<category><![CDATA[Special Culumn: Rare and Endangered Plants and Conservation Genetics]]></category>
<author><![CDATA[FU Xiaoying<sup>1,2</sup>, XIONG Chi<sup>2</sup>, WANG Renfen<sup>2</sup>, FU Longfei<sup>2*</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>FU Xiaoying<sup>1,2</sup>, XIONG Chi<sup>2</sup>, WANG Renfen<sup>2</sup>, FU Longfei<sup>2*</sup></atom:name>
</atom:author>
<guid><![CDATA[http://gxzw.ijournals.cn/gxzwen/ch/reader/view_abstract.aspx?file_no=20250401&flag=1]]></guid><cfi:id>14</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Molecular mechanism of the colour spot formation 
in<i> Paeonia delavayi</i> petals]]></title>
<link><![CDATA[http://gxzw.ijournals.cn/gxzwen/ch/reader/view_abstract.aspx?file_no=20250402&flag=1]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[To investigate the molecular mechanisms of colour spot formation in <i>Paeonia delavayi</i> petals, this study used yellow petals of <i>P. delavayi</i> with and without colour spot as experimental material. Utilizing the Illumina platform for transcriptome sequencing and the UPLC system for metabolome analysis, the key differentially expressed genes(DEGs)and transcription factors affecting colour spot formation in <i>P. delavayi</i> were screened. This provides a scientific basis for developing efficient breeding techniques for <i>P. delavayi</i>. The results were as follows:(1)The transcriptome sequencing yielded 63 981 Unigenes with an average length of 805 bp, and 68.24% of these Unigenes were annotated. A total of 19 496 DEGs were identified, of which 41 DEGs were involved in flavonoid biosynthesis. Among these, the <i>DFR</i>, <i>CHS</i>, and <i>CHI</i> structural genes showed significant differential expression. Among the identified 37 MYB transcription factors, one R2R3-MYB transcription factor, <i>PdMYB</i>30, was found to play a significant role in promoting colour spot formation.(2)Targeted analysis using the UPLC-MS/MS platform detected 44 anthocyanin compounds.(3)The expression trends of DEGs identified by RNA-seq were consistent with the qRT-PCR results. In summary, the colour spot formation of <i>P. delavayi </i>is mainly influenced by anthocyanins. The transcription factor <i>PdMYB</i>30 is positively correlated with the structural genes <i>CHS</i>, <i>CHI</i>, and <i>DFR</i> during the yellow flower with red spot bud stage(B-S1)due to their similar high expression levels. It is predicted that <i>PdMYB</i>30 may act as a positive regulator in the flavonoid biosynthesis pathway, enhancing the expression levels of structural genes involved in flavonoid biosynthesis, thereby promoting the accumulation of anthocyanins in the plant.]]></description>
<pubDate>2025/4/30 10:07:56</pubDate>
<category><![CDATA[Special Culumn: Rare and Endangered Plants and Conservation Genetics]]></category>
<author><![CDATA[LI Haiqing<sup>1</sup>, DU Chun<sup>2</sup>, WANG Juan<sup>2*</sup>, ZHANG Huaibi<sup>3</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LI Haiqing<sup>1</sup>, DU Chun<sup>2</sup>, WANG Juan<sup>2*</sup>, ZHANG Huaibi<sup>3</sup></atom:name>
</atom:author>
<guid><![CDATA[http://gxzw.ijournals.cn/gxzwen/ch/reader/view_abstract.aspx?file_no=20250402&flag=1]]></guid><cfi:id>13</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Transcriptome characteristic analysis and SSR marker 
development of <i>Choerospondias axillaris</i>]]></title>
<link><![CDATA[http://gxzw.ijournals.cn/gxzwen/ch/reader/view_abstract.aspx?file_no=20250403&flag=1]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Transcriptome characteristic analysis and SSR marker was developed based on the leaf transcriptome sequences of <i>Choerospondias axillaris</i> in order to provide theoretical support and scientific basis for genetic evaluation, and sex marker-assisted breeding of <i>C. axillaris</i>. Differential expression of male and female transcriptomes, the distribution and sequence characteristics of SSR locus were analyzed, and SSR locus mining, development and validation were conducted based on the transcriptome data. The results were as follows:(1)A total of 40 341 Unigenes sequences were obtained from male and female transcriptomes of <i>C. axillaris</i>. The total length, the length of N50, average length and GC content were 52 806 369 bp, 2 409 bp, 1 309 bp, and 38.75%, respectively. A total of 1 949 differentially expressed genes between males and females were screened, among them, 1 052 genes were significantly upregulated and 897 genes were downregulated in male compared to female.(2)Among all Unigenes, 5 251 SSR loci were detected with 619 Unigenes sequences containing two or more SSR loci, resulting in an SSR occurrence frequency of 11.18% and an average distribution distance of 10.06 kb. Among all SSR loci, dinucleotide repeats accounted for the highest proportion(46.95%), followed by trinucleotide repeats(34.27%).(3)A total of 20 pairs of SSR polymorphic primers were obtained through screening and validation, detecting 80 alleles among 85 samples, with an average polymorphism information content(PIC)of 0.56. In summary, the sequencing quality of <i>C. axillaris</i> is high, and the assembly effect is good. The 20 pairs of primers is found that had high suitability, which can provide reference for the analysis of population genetic diversity, sex marker-assisted breeding and fingerprints construction of <i>C. axillaris</i>.]]></description>
<pubDate>2025/4/30 10:07:56</pubDate>
<category><![CDATA[Special Culumn: Rare and Endangered Plants and Conservation Genetics]]></category>
<author><![CDATA[XU Mengyang<sup>1,2</sup>, CAI Yuyu<sup>1,2</sup>, LI Ting<sup>1,2</sup>, WU Nansheng<sup>1,2</sup>, SUN Rongxi<sup>1,2*</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>XU Mengyang<sup>1,2</sup>, CAI Yuyu<sup>1,2</sup>, LI Ting<sup>1,2</sup>, WU Nansheng<sup>1,2</sup>, SUN Rongxi<sup>1,2*</sup></atom:name>
</atom:author>
<guid><![CDATA[http://gxzw.ijournals.cn/gxzwen/ch/reader/view_abstract.aspx?file_no=20250403&flag=1]]></guid><cfi:id>12</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Genetic diversity and genetic structure of <i>Camellia 
flavida</i> based on SSR markers]]></title>
<link><![CDATA[http://gxzw.ijournals.cn/gxzwen/ch/reader/view_abstract.aspx?file_no=20250404&flag=1]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[<i>Camellia flavida</i> is listed as a national Class Ⅱ protected plant distributed in southwestern Guangxi with high ornamental value. Understanding the genetic diversity and genetic structure of rare and endangered species can provide a theoretical reference for the conservation and management of their germplasm resources. The present study aimed to analyse the genetic diversity and genetic structure of 12 natural populations of <i>C. flavida</i> in its currently known range using 14 simple sequence repeat(SSR)primers. The results were as follows:(1)A total of 63 alleles were detected by the 14 pairs of primers, with a mean value of polymorphic information content(PIC)of 0.691, indicating a high level of genetic polymorphism.(2)The average allele number(<i>N</i><sub>a</sub>)of the 12 populations was 4.476, the average effective allele number(<i>N</i><sub>e</sub>)was 2.720, the average observed heterozygosity(<i>H</i><sub>o</sub>)was 0.590, the average expected heterozygosity(<i>H</i><sub>e</sub>)was 0.575, and the genetic differentiation coefficient(<i>F</i><sub>ST</sub>)among populations(<i>F</i><sub>ST</sub>)was 0.212.(3)Analysis of molecular variance(AMOVA)revealed that 21.19% occurred among populations(<i>P</i>&lt;0.05), suggesting significant genetic differentiation among populations, which was corroborated by the STRUCTURE and UPGMA analyses.(4)Mantel test indicated a significant positive correlation between genetic distance and geographical distance among populations(<i>R</i><sup>2</sup>=0.177, <i>P</i>&lt;0.05). The above results indicate that <i>C. flavida</i> maintains a degree of genetic diversity and exhibits high levels of genetic differentiation among populations. Based on this result, it is recommended to protect as many natural populations of <i>C. flavida</i> as possible and to strengthen the protection of the Xiashi population.]]></description>
<pubDate>2025/4/30 10:07:56</pubDate>
<category><![CDATA[Special Culumn: Rare and Endangered Plants and Conservation Genetics]]></category>
<author><![CDATA[XIANG Yingying<sup>1,2</sup>, TANG Shaoqing<sup>1,2</sup>, LU Yongbin<sup>3*</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>XIANG Yingying<sup>1,2</sup>, TANG Shaoqing<sup>1,2</sup>, LU Yongbin<sup>3*</sup></atom:name>
</atom:author>
<guid><![CDATA[http://gxzw.ijournals.cn/gxzwen/ch/reader/view_abstract.aspx?file_no=20250404&flag=1]]></guid><cfi:id>11</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[<i>In vitro</i> culture and plant regeneration from 
the leaves of <i>Primulina danxiaensis</i>]]></title>
<link><![CDATA[http://gxzw.ijournals.cn/gxzwen/ch/reader/view_abstract.aspx?file_no=20250405&flag=1]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[<i>Primulina danxiaensis</i>, an endemic species of the Danxia landform within the Gesneriaceae family, exhibits a narrow distribution range and a limited population size, thereby necessitating propagation and conservation via plant tissue culture techniques. In this paper, in order to establish the tissue culture and rapid propagation technical system of <i>P. danxiaensis</i>, the leaf segments of <i>P. danxiaensis</i> were used as explants to screen the appropriate surface disinfection time with HgCl<sub>2</sub>, the culture media for adventitious bud induction, bud proliferation and rooting, as well as the transplanting substrates for tissue-cultured seedlings. The results were as follows:(1)The optimal disinfection procedure involved a 30 s immersion in 75% alcohol, followed by a 6 min soak in 0.1% HgCl<sub>2</sub>, achieving an 84.95% survival rate of leaf explants.(2)For adventitious bud induction, the most effective medium was found to be 1/2MS supplemented with 6-benzyladenine(6-BA)2 mg·L<sup>-1</sup> and <i>α</i>-naphthaleneacetic acid(NAA)0.1 mg·L<sup>-1</sup>, resulting in a 100% bud induction rate and an average of 38.35 buds per leaf explant after 40 days of culture.(3)Bud proliferation medium was optimally achieved on 1/2MS supplemented with 6-BA 3 mg·L<sup>-1</sup> and NAA 0.2 mg·L<sup>-1</sup>, yielding a proliferation coefficient of 7.54 after 50 days.(4)Rooting was successfully induced using 1/2MS medium supplemented with NAA 0.5 mg·L<sup>-1</sup>, leading to a 100% rooting rate and an average of 26.28 roots per plant after 30 days.(5)The tissue-cultured seedlings were successfully acclimatized and transplanted into three different mixed substrates: a mixture of leaf mould of karst landform, perlite, and vermiculite(1:1:1, <i>V/V/V)</i>, peat soil, perlite, and vermiculite(1:1:1, <i>V/V/V</i>), and perlite and vermiculite(1:1, <i>V/V</i>), all with 100% survival rates and demonstrating robust growth. This study is capable of achieving large-scale propagation of <i>P. danxiaensis</i>, a result that significantly contributes to both its resource protection and utilization.]]></description>
<pubDate>2025/4/30 10:07:56</pubDate>
<category><![CDATA[Special Culumn: Rare and Endangered Plants and Conservation Genetics]]></category>
<author><![CDATA[HAN Wei<sup>1</sup>, CHANG Shengxin<sup>1</sup>, MAI Guangwei<sup>1</sup>, ZENG Xiaoyan<sup>1</sup>, 
CHEN Zaixiong<sup>3</sup>, FAN Qiang<sup>2*</sup>, YU Baiyin<sup>1*</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>HAN Wei<sup>1</sup>, CHANG Shengxin<sup>1</sup>, MAI Guangwei<sup>1</sup>, ZENG Xiaoyan<sup>1</sup>, 
CHEN Zaixiong<sup>3</sup>, FAN Qiang<sup>2*</sup>, YU Baiyin<sup>1*</sup></atom:name>
</atom:author>
<guid><![CDATA[http://gxzw.ijournals.cn/gxzwen/ch/reader/view_abstract.aspx?file_no=20250405&flag=1]]></guid><cfi:id>10</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Tissue culture and rapid propagation 
of <i>Bulbophyllum tianguii</i>]]></title>
<link><![CDATA[http://gxzw.ijournals.cn/gxzwen/ch/reader/view_abstract.aspx?file_no=20250406&flag=1]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[In order to establish the tissue culture and rapid propagation of <i>Bulbophyllum tianguii</i>. In this study, the seeds of <i>B. tianguii</i> were selected as explants to screen for suitable culture media for promoting seed germination, cluster bud differentiation, cluster bud proliferation, cluster bud rooting, and the growing media for transplanting and domesticating of rooted seedlings. The results were as follows:(1)The most optimal medium for seed germination of <i>B. tianguii</i> was MS + 6-BA 2.0 mg·L<sup>-1</sup>+ NAA 0.1 mg·L<sup>-1</sup>+ coconut milk 200 mL·L<sup>-1</sup>+ sucrose 30 g·L<sup>-1</sup>+ agar 7 g·L<sup>-1</sup>.(2)The optimal culture medium for cluster bud differentiation was B<sub>5 </sub>+ IBA 0.2 mg·L<sup>-1</sup>+ sucrose 30 g·L<sup>-1</sup>+ agar 7 g·L<sup>-1</sup>.(3)The optimal medium for cluster bud proliferation was MS + 6-BA 2.0 mg·L<sup>-1</sup>+ KT 0.1 mg·L<sup>-1</sup>+ NAA 0.1 mg·L<sup>-1</sup>+ coconut milk 200 mL·L<sup>-1</sup>+ sucrose 30 g·L<sup>-1</sup>+ activated carbon 1 g·L<sup>-1</sup>+ agar 7 g·L<sup>-1</sup>. The proliferation coefficient reached a high value of 6.70.(4)The optimal medium for cluster bud rooting was MS + 6-BA 1.0 mg·L<sup>-1</sup>+ NAA 0.2 mg·L<sup>-1</sup>+ KT 0.5 mg·L<sup>-1</sup>+ coconut milk 200 mL·L<sup>-1</sup>+ sucrose 30 g·L<sup>-1</sup>+ activated carbon 1 g·L<sup>-1</sup>+ agar 7 g·L<sup>-1</sup>. The rooting rate, rooting number and root length reached 100%, 6.19 and 3.15 cm, respectively.(5)The survival rate of rooted seedlings reached 100% when transplanted into media(vermiculite:perlite=2:1). The results not only play a foundation for providing rapid propagation for seedlings and factory production of <i>B. tianguii</i>, but also benefit to resource conservation.]]></description>
<pubDate>2025/4/30 10:07:57</pubDate>
<category><![CDATA[Special Culumn: Rare and Endangered Plants and Conservation Genetics]]></category>
<author><![CDATA[WANG Yake<sup>1,2</sup>, WU Qiaofen<sup>2</sup>, CHAI Shengfeng<sup>2</sup>, YANG Yanni<sup>2</sup>, LIU Qiao<sup>2</sup>, 
ZHENG Wenjun<sup>1</sup>, JIANG Qiang<sup>3</sup>, DENG Zhenhai<sup>3</sup>, QIU Shuo<sup>2*</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>WANG Yake<sup>1,2</sup>, WU Qiaofen<sup>2</sup>, CHAI Shengfeng<sup>2</sup>, YANG Yanni<sup>2</sup>, LIU Qiao<sup>2</sup>, 
ZHENG Wenjun<sup>1</sup>, JIANG Qiang<sup>3</sup>, DENG Zhenhai<sup>3</sup>, QIU Shuo<sup>2*</sup></atom:name>
</atom:author>
<guid><![CDATA[http://gxzw.ijournals.cn/gxzwen/ch/reader/view_abstract.aspx?file_no=20250406&flag=1]]></guid><cfi:id>9</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Effects of supplementary clones on genetic 
diversity of <i>Pinus elliottii</i> seed orchard]]></title>
<link><![CDATA[http://gxzw.ijournals.cn/gxzwen/ch/reader/view_abstract.aspx?file_no=20250407&flag=1]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Supplementing clones in seed orchards with limited or missing clones represents a crucial scientific management strategy. This research focused on the clonal seed orchard of <i>Pinus elliottii</i> at Nanning Forestry Research Institute, examining how additional clones influence the orchard's genetic diversity to offer insights for its scientific management. Utilizing 16 SSR marker pairs, the study assessed genetic diversity variations pre-and post-clone augmentation, analyzing material genetic uniqueness and relationships through fingerprint and genetic clustering. The results were as follows:(1)Enhancing clone numbers from 18 to 50 led to a 2.37% rise in polymorphic information content, a 14.07% rise in average number of observed alleles, a 1.23% rise in average number of effective alleles, and a 3.51% rise in the Shannon index.(2)It was determined that 11 SSR marker pairs could identify all 50 clones, for which fingerprint maps of 50 clones were established.(3)The genetic distance among these clones varied between 0.018 and 0.670, and using a 0.251 threshold, the UPGMA clustering diagram grouped them into seven categories. The study concludes that while clone supplementation enhances the genetic diversity of <i>P. elliottii</i> seed orchards, improvements are modest. Developing fingerprints offers a dependable method for identifying premium <i>P. elliottii </i>clones and analyzing seed orchard progeny parentage. The genetic clustering of established clones serves as a reference for parent selection in <i>P. elliottii</i> hybridization experiments, efficiently preventing inbreeding.]]></description>
<pubDate>2025/4/30 10:07:57</pubDate>
<category><![CDATA[Special Culumn: Rare and Endangered Plants and Conservation Genetics]]></category>
<author><![CDATA[QIN Xianyu<sup>1,2</sup>, FENG Yuanheng<sup>2</sup>, XIE Junkang<sup>2</sup>, MENG Lanyang<sup>3</sup>, YANG Zhangqi<sup>2*</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>QIN Xianyu<sup>1,2</sup>, FENG Yuanheng<sup>2</sup>, XIE Junkang<sup>2</sup>, MENG Lanyang<sup>3</sup>, YANG Zhangqi<sup>2*</sup></atom:name>
</atom:author>
<guid><![CDATA[http://gxzw.ijournals.cn/gxzwen/ch/reader/view_abstract.aspx?file_no=20250407&flag=1]]></guid><cfi:id>8</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Characteristics of native <i>Aspidistra</i> germplasm resources 
in Guangxi and their landscape applications]]></title>
<link><![CDATA[http://gxzw.ijournals.cn/gxzwen/ch/reader/view_abstract.aspx?file_no=20250408&flag=1]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Based on literature review and field investigations, this study systematically examined the distribution, habitats, ornamental characteristics, and landscape development value of native <i>Aspidistra</i> species in Guangxi. A comprehensive evaluation of 52 introduced and cultivated species was conducted from three key perspectives: ecological adaptability, ornamental traits, and landscape application potential. The results were as follows:(1)A total of 96 <i>Aspidistra</i> taxa(including infraspecific ranks)were documented in Guangxi, of which 59 species(61.46% of the total)were endemic, indicating a pronounced pattern of endemism.(2)Spatially, the genus exhibited an uneven horizontal distribution, with concentrated occurrences in the karst mountainous areas of southwestern, western-northwestern, northern-northeastern, and central Guangxi. The highest species richness was observed in border regions adjacent to Vietnam, particularly in Longzhou, Daxin, Jingxi, Napo, Ningming, and neighboring areas such as Long'an and Debao. Vertically, most species were distributed at elevations of 200-800 meters above sea level.(3)The landscape comprehensive evaluation revealed that most species in this genus possessed both significant landscape aesthetic value and strong ecological adaptability. These species showed significant potential for diverse landscape applications, including ground cover in woodland settings, flower beds and borders, edging plants, limestone and rock garden accents, specialized garden designs, and potted ornamental plants, demonstrating significant potential as regionally distinctive native ornamental plants. This research findings can provide references for the resource development and utilization of plants of this genus in Guangxi, botanic landscape design and ecological sustainability.]]></description>
<pubDate>2025/4/30 10:07:57</pubDate>
<category><![CDATA[Special Culumn: Rare and Endangered Plants and Conservation Genetics]]></category>
<author><![CDATA[ZOU Lingli<sup>1,2</sup>, PAN Bo<sup>3</sup>, TANG Wenxiu<sup>3</sup>, ZHANG Qiong<sup>1</sup>, YAN Pengbo<sup>1,2*</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>ZOU Lingli<sup>1,2</sup>, PAN Bo<sup>3</sup>, TANG Wenxiu<sup>3</sup>, ZHANG Qiong<sup>1</sup>, YAN Pengbo<sup>1,2*</sup></atom:name>
</atom:author>
<guid><![CDATA[http://gxzw.ijournals.cn/gxzwen/ch/reader/view_abstract.aspx?file_no=20250408&flag=1]]></guid><cfi:id>7</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Analysis of chloroplast genome of <i>Pogostemon 
cablin </i>from different origins]]></title>
<link><![CDATA[http://gxzw.ijournals.cn/gxzwen/ch/reader/view_abstract.aspx?file_no=20250409&flag=1]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[<i>Pogostemon cablin</i> possesses significant medical and industrial values, as it can be used for medicinal purposes as well as for essential oil extraction. However, the yield and quality of <i>P. cablin</i> can vary depending on the ecological environments and artificial cultivation measures employed in different production regions and origins. In order to study the structural characteristics and compare the differences of the chloroplast genome of <i>P. cablin </i>of different origins, this study used the DNBSeq sequencing platform to sequence the whole genome of<i> P. cablin</i>, used GetOrganelle to assemble the complete chloroplast genome, annotated the chloroplast genome on the CPGAVAS2 website, and analyzed the basic structural characteristics, IR/SC boundary comparison, genome comparison and collinearity analysis, simple repeat sequences and interspersed repeat sequences, diversity analysis and relative usage analysis of synonymous codons. The results were as follows:(1)The full length of the chloroplast genomes of 20 different origins of <i>P. cablin</i> was 152 461-152 510 bp, and 132 genes were annotated, including 87 CDSs, 37 tRNA genes and 8 rRNA genes.(2)The mVISTA comparison found that <i>atp</i>F, <i>atp</i>F-<i>atp</i>H, <i>rps</i>16-<i>trn</i>Q-UUG, <i>rpo</i>B-<i>trn</i>C-GCA, <i> acc</i>D, <i>psa</i>I-<i>ycf</i>4, <i>pet</i>A-<i>psb</i>J, <i>rpl</i>16, and <i>rps</i>15-<i>ycf</i>1 were hypervariable regions.(3)The sites with nucleic acid diversity greater than 0.002 were located in the <i>trn</i>M-CAU-<i>atp</i>B interval, <i>ycf</i>4, <i>rpl</i>32, and <i>rpl</i>32-<i>trn</i>L-UAC interval.(4)A total of 64 codons encoding 20 amino acids were detected, and there were 33 highly preferred codons, among which codons ending in A/U accounted for the majority.(5)And 74-76 SSRs, 15-18 palindrome repeat sequences, and 12-17 forward repeat sequences were detected.(6)Genetic distance analysis and phylogenetic analysis found that only GSY_MLXY had a distant genetic relationship with other cultivated types. In this study, the genome structure information and different sites identified of chloroplasts from 20 different sources of <i>P. cablin</i> are obtained, which provides basic data for the development of molecular markers and the selection of superior germplasm.]]></description>
<pubDate>2025/4/30 10:07:57</pubDate>
<category><![CDATA[Special Culumn: Rare and Endangered Plants and Conservation Genetics]]></category>
<author><![CDATA[XING Bingnan, LIANG Yingying, WU Wenru<sup>*</sup>, LU Yaru, ZOU Heyuan, PENG Xiaoqi]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>XING Bingnan, LIANG Yingying, WU Wenru<sup>*</sup>, LU Yaru, ZOU Heyuan, PENG Xiaoqi</atom:name>
</atom:author>
<guid><![CDATA[http://gxzw.ijournals.cn/gxzwen/ch/reader/view_abstract.aspx?file_no=20250409&flag=1]]></guid><cfi:id>6</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Genetic diversity analysis of <i>Illicium verum</i> germplasm 
resources in Guangxi based on SLAF-seq]]></title>
<link><![CDATA[http://gxzw.ijournals.cn/gxzwen/ch/reader/view_abstract.aspx?file_no=20250410&flag=1]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[As one of the significant characteristic economic forestry species in Guangxi, star anise(<i>Illicium verum</i>)exihibits a rich genetic diversity. In order to uncover the genetic diversity of star anise germplasm resources in Guangxi, the specific locus amplified fragment sequencing(SLAF-seq)technology was employed. This enabled an in-depth investigation into the single nucleotide polymorphism(SNP)loci across 53 star anise population samples, gathered from a variety of geographical territories within Guangxi, as well as 42 samples of artificially selected superior germplasm. Based on SNP polymorphism, population genetic structure and genetic diversity analyses were conducted on these star anise samples. The results were as follows:(1)From 95 star anise samples, a total of 1 588 Mb of sequencing data and 643 690 SLAF tags were obtained, of which 74 434 were polymorphic SLAF tags. After filtering, 2 690 564 population SNPs were identified.(2)The 95 star anise samples were classified into two fundamental clusters: Cluster Ⅰ assimilated samples originating from the North Guangxi, West Guangxi, and some regions of Central Guangxi, whereas Cluster Ⅱ embraced the 42 samples of artificially selected superior germplasm, coupled with samples from South Guangxi, East Guangxi, and portions of Central Guangxi.(3)Populations from North Guangxi exhibited the highest level of genetic diversity, followed sequentially by those from East, Central, West, and South Guangxi. In contrast, the artificially selected superior germplasm samples displayed the lowest degree of genetic diversity. In conclusion, the study effectively demonstrates that SNP molecular markers, derived from SLAF-seq technology, are capable of efficiently assessing the genetic diversity in samples from different regions of Guangxi and the samples of artificially selected superior germplasm. This information acts as a significant theoretical guide for the conservation, utilization of the star anise genetic resources in Guangxi, as well as the selection of superior germplasms.]]></description>
<pubDate>2025/4/30 10:07:57</pubDate>
<category><![CDATA[Special Culumn: Rare and Endangered Plants and Conservation Genetics]]></category>
<author><![CDATA[LI Jinmei<sup>1,2</sup>, ZHONG Yu<sup>1</sup>, CHEN Jianhua<sup>1,2</sup>, MING Ruhong<sup>1,2</sup>, YAO Shaochang<sup>1,2</sup>, 
LI Liangbo<sup>1,2</sup>, TAN Yong<sup>1,2</sup>, HUANG Rongshao<sup>1,2</sup>, YAO Chun<sup>1</sup>, HUANG Ding<sup>1,2*</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LI Jinmei<sup>1,2</sup>, ZHONG Yu<sup>1</sup>, CHEN Jianhua<sup>1,2</sup>, MING Ruhong<sup>1,2</sup>, YAO Shaochang<sup>1,2</sup>, 
LI Liangbo<sup>1,2</sup>, TAN Yong<sup>1,2</sup>, HUANG Rongshao<sup>1,2</sup>, YAO Chun<sup>1</sup>, HUANG Ding<sup>1,2*</sup></atom:name>
</atom:author>
<guid><![CDATA[http://gxzw.ijournals.cn/gxzwen/ch/reader/view_abstract.aspx?file_no=20250410&flag=1]]></guid><cfi:id>5</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Comprehensive analysis and evaluation of phenotypic 
genetic diversity of <i>Bougainvillea</i> varieties]]></title>
<link><![CDATA[http://gxzw.ijournals.cn/gxzwen/ch/reader/view_abstract.aspx?file_no=20250411&flag=1]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[To provide a scientific reference for the innovative utilization and breeding of new varieties of <i>Bougainvillea</i> germplasm resources. This study took 100 <i>Bougainvillea</i> varieties as the research object, observed 7 quantitative traits and 13 qualitative traits, and used data analysis methods such as coefficient of variation, quantitative classification, genetic diversity index, correlation analysis, principal component analysis and Q-type cluster analysis to comprehensively analyze and evaluate the phenotypic genetic diversity of the tested <i>Bougainvillea</i> varieties. The results were as follows:(1)The variation of within the varieties of the seven quantitative traits was 7.52%-29.27%, of which two were less than 10%, three were between 10%-20%, and two were greater than 20%; the variation of between varieties was 20.15%-41.08%, all of which were greater than 20%. This showed that the variation of the quantitative traits of <i>Bougainvillea</i> within the varieties was at a medium level, while the variation between varieties was at a high level. It was more likely to use the difference in quantitative traits between varieties to identify varieties.(2)The probability classification method was more scientific and reasonable than the traditional equidistance classification method, making it more suitable for the quantitative trait classification in this study.(3)The genetic diversity indexes of the seven quantitative traits were all greater than 1.00; the genetic diversity indexes of the 13 qualitative traits ranged from 0.08 to 2.74, of which the diversity indexes of eight qualitative traits were greater than 1.00. This indicated that the overall genetic diversity level of <i>Bougainvillea</i> phenotypes was high.(4)Principal component analysis could simplify the 20 phenotypic traits into eight principal component factors, with a cumulative contribution rate of 78.689%. The first principal component was determined by leaf width, leaf length, and petiole length, indicating that the quantitative traits of leaves were the main trait indicators for distinguishing <i>Bougainvillea</i> varieties.(5)Q-type cluster analysis mainly divided 100 <i>Bougainvillea</i> variety resources into four categories based on the size of leaves and bracts. In conclusion, <i>Bougainvillea</i> phenotypic genetic diversity level was higher, leaves and bracts were the main indicators of <i>Bougainvillea</i> varieties, using scientific and reasonable probability grading method at the same time, to identify varieties and germplasm innovation and breeding has important significance.]]></description>
<pubDate>2025/4/30 10:07:57</pubDate>
<category><![CDATA[Special Culumn: Rare and Endangered Plants and Conservation Genetics]]></category>
<author><![CDATA[YU Shujun, CEN Ruobang, LIU Jiamei, JING Yanzhi, LI Meifen, 
FENG Yiqi, HUANG Jiuxiang<sup>*</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>YU Shujun, CEN Ruobang, LIU Jiamei, JING Yanzhi, LI Meifen, 
FENG Yiqi, HUANG Jiuxiang<sup>*</sup></atom:name>
</atom:author>
<guid><![CDATA[http://gxzw.ijournals.cn/gxzwen/ch/reader/view_abstract.aspx?file_no=20250411&flag=1]]></guid><cfi:id>4</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Cluster analysis and grafting affinity study of <i>Prunus 
campanulata</i> and related species based on EST-SSR]]></title>
<link><![CDATA[http://gxzw.ijournals.cn/gxzwen/ch/reader/view_abstract.aspx?file_no=20250412&flag=1]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[This study used 16 species of <i>Prunus</i> plants as research materials and conducted cluster analysis using EST-SSR molecular marker technology, aiming to provide molecular level basis and technical support for species classification, species resource conservation, rootstock selection, and hybrid parent selection of <i>P. campanulata</i> and its related species. The results were as follows:(1)The results of genetic diversity analysis showed that a total of 98 alleles were detected from 17 pairs of EST-SSR primers, with an average of 5.76 alleles per primer pair. The number of effective alleles(<i>N</i><sub>e</sub>)range was 1.16-7.64, with an average of 3.22; the observed heterozygosity(<i>H</i><sub>o</sub>)range was 0.04-0.54, with an average value of 0.28; the expected heterozygosity(<i>H</i><sub>e</sub>)range was 0.58-0.92, with an average value of 0.77; the Shannon's index(<i>I</i>)range was 1.38-2.65, with an average value of 2.14; the polymorphism information content(PIC)range was 0.62-0.92, with an average value of 0.78.(2)The clustering analysis results indicated that, except for <i>P. subhirtella</i> var. <i>ascendens</i> and<i> P. maximowiczii</i>, the other 14 species were closely related and were clustered into a large group(<i>C</i><sub>GS</sub> ranging from 0.653 1 to 0.918 4). Among them, the highest genetic relationship was found between <i>P. campanulata</i> and <i>P. cerasoides </i>(<i>C</i><sub>GS</sub>=0.918 4), while the lowest was found between <i>P. campanulata</i> and <i>P. subhirtella </i>var. <i>ascendens</i>(<i>C</i><sub>GS</sub>=0.775 5). Therefore, it is recommended to use <i>P. subhirtella</i> var. <i>ascendens</i> and<i> P. maximowiczii </i>with distant genetic relationships to conduct hybridization experiments with <i>P. campanulata</i>.(3)In the production practice of southern China, grafting had emerged using <i>P. conradinae</i> as rootstock and <i>P. campanulata</i> as scion grafting. Therefore, in theory, species closely related to <i>P. campanulata</i>, such as <i>P. conradinae, P. serrulata, P. discoidea, P. patentipila </i>and<i> P. schneideriana</i> etc., could also serve as rootstocks. Nevertheless, the resistance, growth, reproduction, and lifespan of the rootstock should also be considered. Through grafting experiments, it was found that <i>P. cerasoides</i> and <i>P. serrulata</i> had the highest survival rates(≥80%)when grafted onto <i>P. campanulata</i>, which were consistent with molecular experiments and were more suitable as rootstocks for grafting <i>P. campanulata</i>. The research results provide a molecular basis for breeding, reproduction, protection and utilization of <i>P. campanulata</i>, and the classification of species between <i>Prunus</i>.]]></description>
<pubDate>2025/4/30 10:07:57</pubDate>
<category><![CDATA[Special Culumn: Rare and Endangered Plants and Conservation Genetics]]></category>
<author><![CDATA[LIU Kui, LI Zihan, ZHANG Yi, HAO Wenjie, JIANG Lei, YE Qi, FU Tao<sup>*</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LIU Kui, LI Zihan, ZHANG Yi, HAO Wenjie, JIANG Lei, YE Qi, FU Tao<sup>*</sup></atom:name>
</atom:author>
<guid><![CDATA[http://gxzw.ijournals.cn/gxzwen/ch/reader/view_abstract.aspx?file_no=20250412&flag=1]]></guid><cfi:id>3</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Response of functional traits of <i>Castanopsis hystrix</i> 
leaves to geographical environment factors]]></title>
<link><![CDATA[http://gxzw.ijournals.cn/gxzwen/ch/reader/view_abstract.aspx?file_no=20250413&flag=1]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Leaf is an important nutrient organ for physiological and biochemical activities of plants, and its functional traits reflect the environmental adaptability of plants to a certain extent. Revealing the relationship between the functional traits of <i>Castanopsis hystrix</i> leaves and geographical environment factors is helpful for understand its adaptive response to environmental changes, which provides a theoretical basis for the conservation of <i>C. hystrix</i> germplasm resources and the selection and utilization of seed sources. In this study, six populations of <i>C. hystrix</i> in Guangxi were used as the research objects. Various statistical methods including nested analysis of variance, principal component analysis, and cluster analysis were employed to analyze the variation of leaf functional traits and their correlations with geographical environment factors, to explore the pattern of geographical and environmental variation in the leaf functional traits of <i>C. hystrix</i>. The results were as follows:(1)The 13 leaf functional traits of <i>C. hystrix</i> showed highly significant differences among and within populations(<i>P</i>&lt;0.001), with high diversity.(2)The leaf functional traits were dominated by within population variation [average trait differentiation coefficient(<i>V<sub>st</sub></i>)=22.28%], and the differentiation between populations of morphological traits(13.11%-46.93%)was higher than that of physiological and biochemical traits(10.95%-22.59%), indicating that the morphological traits of leaves responded more significantly to the environment.(3)The leaf functional traits were positively correlated with altitude, latitude and longitude, but negatively correlated with annual precipitation, indicating that the leaf functional traits of <i>C. hystrix</i> were affected by altitude, geographic distance and precipitation.(4)Cluster analysis divided the participating <i>C. hystrix</i> populations into two groups, and Mantel test showed that leaf functional traits were significqantly positively correlated with both geographic distance(<i>P</i>=0.028)and altitude(<i>P</i>=0.013), and the effects of altitude on leaf functional traits were relatively more significant. In summary, the functional traits of <i>C. hystrix</i> leaves are rich in variation, which mainly originates from within populations and show a pattern of geographic variation dominated by changes in altitude, latitude, longitude and precipitation.]]></description>
<pubDate>2025/4/30 10:07:57</pubDate>
<category><![CDATA[Special Culumn: Rare and Endangered Plants and Conservation Genetics]]></category>
<author><![CDATA[LI Qiguo<sup> 1</sup>, JIANG Weixin<sup>1</sup>, TAN Zhangqiang<sup>2</sup>, BAI Tiandao<sup>1*</sup>, SHEN Wenhui<sup>2</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LI Qiguo<sup> 1</sup>, JIANG Weixin<sup>1</sup>, TAN Zhangqiang<sup>2</sup>, BAI Tiandao<sup>1*</sup>, SHEN Wenhui<sup>2</sup></atom:name>
</atom:author>
<guid><![CDATA[http://gxzw.ijournals.cn/gxzwen/ch/reader/view_abstract.aspx?file_no=20250413&flag=1]]></guid><cfi:id>2</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[A newly recorded species of <i>Aspidistra</i>(Asparagaceae)
from China: <i>Aspidistra xuansonensis</i> var. <i>violiflora</i>]]></title>
<link><![CDATA[http://gxzw.ijournals.cn/gxzwen/ch/reader/view_abstract.aspx?file_no=20250414&flag=1]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[<i>Aspidistra xuansonensis</i> var. <i>violiflora</i> is reported here as a newly recorded taxa for the first time in China from the karst region of Yunnan Province. It is similar to <i>A. saxicola</i> Y. Wan, but differs by its stamens are inserted at the lower part of perigone tube, the stigma surface white, irregular wavy at margin. <i>A. xuansonensis</i> var. <i>violiflora</i> and <i>A. xuansonensis</i> var. <i>xuansonensis</i> were previously known only from the Xuan Son National Park, Phu Tho Province, Vietnam. Recently, we found <i>A. xuansonensis</i> var. <i>violiflora</i> in Hekou Yao Autonomous County, Yunnan Province, China, collected specimens and introduced plants. The new discovery enriches the diversity for the genus <i>Aspidistra </i>in China, which has some biogeographical significance for the study of <i>Aspidistra</i> in Sino-Vietnamese border areas, and also provides potential resources for the development of this genus in landscaping and horticulture. Detailed characteristic descriptions, pollen morphology and color plates are provided for identification, and the changes in flower color of the genus <i>Aspidistra</i> were discussed.]]></description>
<pubDate>2025/4/30 10:07:57</pubDate>
<category><![CDATA[Special Culumn: Rare and Endangered Plants and Conservation Genetics]]></category>
<author><![CDATA[LI Meixian<sup>1,2</sup>, LU Qiuyan<sup>1,2</sup>, LI Jianling<sup>3</sup>, WEI Yujing<sup>2</sup>, LIN Chunrui<sup>2*</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LI Meixian<sup>1,2</sup>, LU Qiuyan<sup>1,2</sup>, LI Jianling<sup>3</sup>, WEI Yujing<sup>2</sup>, LIN Chunrui<sup>2*</sup></atom:name>
</atom:author>
<guid><![CDATA[http://gxzw.ijournals.cn/gxzwen/ch/reader/view_abstract.aspx?file_no=20250414&flag=1]]></guid><cfi:id>1</cfi:id><cfi:read>true</cfi:read></item>
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