Suppr超能文献

云杉属(松科)的分子系统发育与生物地理学:对利用细胞质单倍型进行系统地理学研究的启示

Molecular phylogeny and biogeography of Picea (Pinaceae): implications for phylogeographical studies using cytoplasmic haplotypes.

作者信息

Ran Jin-Hua, Wei Xiao-Xin, Wang Xiao-Quan

机构信息

State Key Laboratory of Systematic and Evolutionary Botany, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China.

出版信息

Mol Phylogenet Evol. 2006 Nov;41(2):405-19. doi: 10.1016/j.ympev.2006.05.039. Epub 2006 Jun 6.

Abstract

The center of diversity is not necessarily the place of origin, as has been established by many plant molecular phylogenies. Picea is a complicated but very important genus in coniferous forests of the Northern Hemisphere, with a high species diversity in Asia. Its phylogeny and biogeography were investigated here using sequence analysis of the paternally inherited chloroplast trnC-trnD and trnT-trnF regions and the maternally inherited mitochondrial nad5 intron 1. We found that the North American P. breweriana and P. sitchensis were basal to the other spruces that were further divided into three clades in the cpDNA phylogeny, and that the New World species harbored four of five mitotypes detected, including two ancestral ones and three endemics. These results, combined with biogeographic analyses using DIVA and MacClade and fossil evidence, suggest that Picea originated in North America, and that its present distribution could stem from two times of dispersal from North America to Asia by the Beringian land bridge, and then from Asia to Europe. Most of the northeastern Asian species and the European P. abies could arise from a recent radiation given the very low interspecific genetic differentiation and pure mitotype of them. Considering that the ancestral mtDNA polymorphism can be preserved in many descendant species, even distantly related ones, we suggest that more species, at least the closely related ones, should be sampled in the phylogeographical study using cytoplasmic haplotypes if possible. In addition, we also discussed the evolution and phylogenetic utility of morphological characters in Picea.

摘要

正如许多植物分子系统发育研究已证实的那样,多样性中心不一定是起源地。云杉属是北半球针叶林中一个复杂但非常重要的属,在亚洲具有很高的物种多样性。本文利用父系遗传的叶绿体trnC-trnD和trnT-trnF区域以及母系遗传的线粒体nad5内含子1的序列分析,对其系统发育和生物地理学进行了研究。我们发现,北美云杉(P. breweriana)和西加云杉(P. sitchensis)在其他云杉属植物中处于基部位置,在叶绿体DNA系统发育中,其他云杉属植物进一步分为三个分支,并且新世界物种包含了检测到的五种线粒体类型中的四种,包括两种祖先类型和三种特有类型。这些结果,结合使用DIVA和MacClade进行的生物地理学分析以及化石证据,表明云杉属起源于北美,其目前的分布可能源于两次通过白令陆桥从北美向亚洲的扩散,然后从亚洲扩散到欧洲。鉴于亚洲东北部的大多数物种和欧洲云杉(P. abies)种间遗传分化极低且线粒体类型单一,它们可能源于近期的辐射分化。考虑到祖先线粒体DNA多态性可以在许多后代物种中保留,甚至是亲缘关系很远的物种,我们建议,如果可能的话,在使用细胞质单倍型进行系统地理学研究时,应该对更多物种,至少是亲缘关系相近的物种进行采样。此外,我们还讨论了云杉属形态特征的进化及其在系统发育中的应用。

文献AI研究员

20分钟写一篇综述,助力文献阅读效率提升50倍。

立即体验

用中文搜PubMed

大模型驱动的PubMed中文搜索引擎

马上搜索

文档翻译

学术文献翻译模型,支持多种主流文档格式。

立即体验