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Plant Diversity ›› 2006, Vol. 01 ›› Issue (01): 29-36.

• 研究论文 • 上一篇    下一篇

基于matR 基因序列分析的山茶科系统关系*

  

  • 出版日期:2006-02-25 发布日期:2014-01-14

Phylogenetic Relationships of Theaceae Inferred from Mitochondrial matR Gene Sequence Data

  1. 1 Laborat ory of Biodiversity and Biogeography, Kunming Institute of Botany, Chinese Academy of Sciences , Kunming 650204, China;
    2 Laboratory of Bi otechnol ogy , Nati onal Agricultural Research Center f or Western Regi on, 6- 11- 3- 502 Nishifukatsu,
    Fukuyama, Hiroshima 721- 0975, Japan; 3 Research Farm & Laboratory of Plant Cytogenetics,
    Faculty of Agriculture, Okayama University , Okayama 700- 8530, Japan
  • Online:2006-02-25 Published:2014-01-14

摘要:

通过线粒体matR 基因序列分析探讨了山茶科的分类学范围和系统演化关系。结果显示, 传统山茶科的两个核心) ) ) 山茶亚科(Theoideae 或Camellioideae) 和厚皮香亚科( Ternstroemioideae) 不构成姐妹群关系, 山茶亚科是一个支持率很高的单系类群, 厚皮香亚科没有形成单系; 山茶亚科下可区分出3 个明显的分支, 基部的分支由紫茎属( Stewartia) 和舟柄茶属( Hartia) 组成, 木荷属( Schima) 、美洲荷属( Franklinia) 和美国大头茶属( Gordonia) 构成第2 个分支, 该分支与由山茶属( Camellia) 、核果茶属( Pyrenaria) 、多瓣核果茶属( Parapyrenaria) 、石笔木属( Tutcheria) 、大头茶属( Polysp ora) 和圆籽荷属( Aptersperma) 组成的第3 个分支互为姐妹群。研究结果很好地支持了Prince 和Parks 等学者提出的的狭义山茶科( 仅含山茶亚科) 和狭义大头茶属的概念以及科下3 个族( 紫茎族Stewartieae、大头茶族Gordonieae 和山茶族Theeae) 的划分。但本研究更为清晰地揭示了科下3 个族间的系统关系, 即紫茎族是最基部的分支, 山茶族与大头茶族间有更近的亲缘关系。同时,本文认为, 厚皮香( 亚) 科是否为单系类群值得进一步研究。

关键词: MatR 基因序列, 系统发育, 山茶科

Abstract:

The circumscription and phylogenetic relationships of Theaceae was investigated using mitochondrial matR sequences data. Phylogenetic analyses based on the matR data, strongly support a monophyletic Theoideae ( or Camellioideae) containing three wel-l supported lineages ( Stewartieae, Gordonieae and Theeae ) , but do not support the sister relationship of Theoideae and Ternstroemioideae, suggesting a paraphyletic Ternstroemioideae. These results are consistent with some recent authors recognizing Theaceae sensu stricto ( s1s. ) to the ex clusion of Ternstroemioideae, and give further support for the three-tribe class-ification system of Theaceae s1s. of Prince and Parks in 2001. On the other hand, the matR-based analyses provide a better resolution of the phylogeny within Theaceae s1s. , i1 e. , Stewartieae is the basalmost lineage in Theaceae, and Theeae and Gordonieae are closely related with weak support ( bootstrap= 64%) .

Key words: MatR sequences, Phylogeny, Theaceae

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