| 摘要: |
| 对分布于中国的榕亚属植物的15个种和2个变种(分别代表榕亚属的3个组)的nrDNA的ITS序列和系统发育关系进行分析。结果表明,榕亚属是非单系起源,其中榕组构成了一个独立的单系群,与无花果亚属有较近的亲缘关系,而与榕亚属其它组间并未表现出近缘关系。榕亚属的其它5个组构成一单系群并得到中度的支持率。来自中国的种类分别聚在相应的组内。但环纹榕组被分成2个单支,其中来自中国的大叶水榕(F.glaberrima)和环纹榕(F.annulata)构成一个分支,二者表现较近的亲缘关系。榕亚属的亚洲特有组印度榕组在ITS树中聚在环纹榕组的另一个分支中,但它与此组其它种的亲缘关系并不清楚。 |
| 关键词: 中国榕亚属 ITS序列 系统发育分析 |
| DOI： |
| 分类号:Q941 |
| Fund project: |
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| Preliminary study on phylogeny of Ficus subg.Urostigma (Moraceae)in China |
|
YAO Jin-Yan1,2, ZHAO Nan-Xian2, HAO Gang3, CHEN Yi-Zhu2
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1.Institute of Horticultural, Guangxi Academy of Agricultural Sciences, Nanning 530007, China;2.South
China Botanical Garden, The Chinese Academy of Sciences, Guangzhou 510650, China;3. College
of Biological Science, South China Agricultural University, Guangzhou 510642, China
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| Abstract: |
| Based on the ITS sequences of nuclear ribosomal DNA,15 species and two varieties of 3 sections of Ficus subgenus Urostigma from China were selected for phylogenetic analysis. Maximum Parsimonious analysis suggested that subgenus Urostigma was not monophyletic. Sect.Urostigma was a monophyletic group,and was closely related with subg.Ficus instead with subg.Urostigma. Five other sections of subg.Urostigma formed a clade with moderate support(75%). In this clade,sect.Conosycea was classified into two sister groups.F.glaberrima and F.annulata constitute one unique group with close relationship. From this study,the systematic position of sect.Stilpnophyllum endemic to Asia is not resolved,F.elastica falls in sect.Conosycea in the ITS tree,but its relationship remains unclear within the latter section. |
| Key words: subg.Urostigma in China ITS sequences phylogenetic analysis |
