| 摘要: |
| 研究了濒危植物兰花蕉及其变种长萼兰花蕉的核型。结果表明,兰花蕉中期染色体的相对长度为5.00～7.78 μm,核型公式为2n=6x=54=23m+3sm(1sec)+1st(sec); 而长萼兰花蕉中期染色体相对长度为5.00～7.92 μm,核型公式为2n=6x=54=22m+4sm(2sec)+1st(sec)。按Stebbins的分类,两者均属2A型 。根据核形态的有关数据分析,进一步支持将长萼兰花蕉作为兰花蕉变种处理的观点。 |
| 关键词: 核型 兰花蕉 兰花蕉科 |
| DOI： |
| 分类号:Q943 |
| Fund project: |
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| Karyotypes of endangered plant Orchidantha chinensis(Lowiaceae) |
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MIN Ling-Li1,2, SONG Juan-Juan1, LIAO Jing-Ping1,
CHENG Zhong-Yi1, TANG Yuan-Jiang1*
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1.South China Botanical Garden, the Chinese Academy of Science, Guangzhou 510650, China;2.Graduate University of the Chinese Academy of Sciences, Beijing 100049, China
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| Abstract: |
| The karyotypes of endangered plant Orchidantha chinensis and O.chinensis var.longisepala were studied for the first time in this paper. The results indicated that metaphase chromosomes of O.chinensis were ranged in length from 5.00 to 7.78 μm,while those of O.chinensis var.longisepala were ranged in length from 5.00 to 7.92 μm. The karyotype of the former was formulated as 2n=6x=54=23m+3sm(1sec)+1st(sec),that of the latter was formulated as 2n=6x=54=22m+4sm(2sec)+1st(sec). Both belong to Stebbins' 2A type. The conclusion that O.chinensis var. longisepala was considered as a variety was supported in light of the karyomorphological data in this paper. |
| Key words: Karyotype Orchidantha chinensis Lowiaceae |
