樟科润楠属植物ITS 序列贝叶斯分析及其系统学意义

doi:10.3724 SP.J.1143.2009.08206

Plant Diversity ›› 2009, Vol. 31 ›› Issue (02): 117-126.DOI: 10.3724 SP.J.1143.2009.08206

樟科润楠属植物ITS 序列贝叶斯分析及其系统学意义

陈俊秋^{1 , 2} , 李朗^{1 , 2} , 李捷¹, 李锡文³

1 中国科学院西双版纳热带植物园植物系统与保护生物学实验室, 云南昆明 650223; 2 中国科学院研究生院, 北京 100049; 3 中国科学院昆明植物研究所标本馆, 云南昆明 650204

收稿日期:2008-11-18 出版日期:2009-04-25 发布日期:2009-04-25
通讯作者: 李捷

Bayesian Inference of nrDNA ITS Sequences from Machilus (Lauraceae) and Its Systematic Significance

CHEN Jun-Qiu^{1 , 2} , LI Lang^{1 , 2} , LI Jie¹, LI Hsi-Wen³

1 Laboratory of Plant Phylogenetics and Conservation Biology, Xishuangbanna Tropical Botanical Garden , Chinese Academy of Sciences,
Kunming 650223 , China ; 2 Graduate University of Chinese Academy of Sciences, Beijing 100049, China; 3 Herbaium, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650204 , China

Received:2008-11-18 Online:2009-04-25 Published:2009-04-25
Contact: LI Jie

摘要/Abstract

摘要： 应用nrDNA Internal Transcribed Spacer ( ITS) 序列, 使用Bayesian 分析法对樟科润楠属的系统学问题进行了初步探讨, 结果表明润楠属在鳄梨属群中本身作为一独立分支, 是一个自然的单系类群; 由于其花被裂片果期宿存且强烈反转与同产自亚洲的楠属和油丹属存在清晰界线。本研究否定了前人依据花被片外面被毛情况及果实大小所建立的润楠属属下系统, 但同时暗示着花序类型可能是解决润楠属下系统演化的关键性状。本研究对解决润楠属属内种间的系统演化关系尚有不足, 建议今后补充更多的属内物种以及寻找新的分子标记进行更深入的研究。

关键词: face=Verdana>The, phylogeny, of, the, genus, Machilus, was, analysed, by

Abstract: The phylogeny of the genus Machilus was analysed by means of Bayesian Inference of nrDNA ITS sequences. Our results indicated that Machilus is a monophyletic clade within the Persea group, and its persistent and spreading to reflexed tepals on fruit are an important character for its generic delimitation against the related genera Phoebe , Alseodaphne and Persea . This study rejects the former infrageneric systematic arrangement of Machilus based on the pubescence type of tepals abaxially and the size of fruit , but suggests that the type of inflorescences may be valuable for the understanding of its infrageneric evolution . However , the species relationships within Machilus are poorly resolved . Samplings of additional taxa from Machilus and more powerful markers are needed in further study .

Key words: Lauraceae

中图分类号:

Q 949

陈俊秋1 , 2 , 李朗1 , 2 , 李捷1 , 李锡文3 . 樟科润楠属植物ITS 序列贝叶斯分析及其系统学意义[J]. Plant Diversity, 2009, 31(02): 117-126.

CHEN Jun-Qiu^, , LI Lang^, , LI Jie, LI Hsi-Wen. Bayesian Inference of nrDNA ITS Sequences from Machilus (Lauraceae) and Its Systematic Significance[J]. Plant Diversity, 2009, 31(02): 117-126.

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樟科润楠属植物ITS 序列贝叶斯分析及其系统学意义

Bayesian Inference of nrDNA ITS Sequences from Machilus (Lauraceae) and Its Systematic Significance

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