Google Search Baidu Search
(多个关键字请用"空格"格开)
您当前的位置:首页 > 科研成果 > 论文
论文

Polyploidy promotes species diversification of Allium through ecological shifts 

 
论文编号:
作者: Han TS
刊物名称: New Phytologist
所属学科:
论文题目英文: Polyploidy promotes species diversification of Allium through ecological shifts
年: Aug 2019
卷: online
期:
页:
联系作者: Xing YW
收录类别:
影响因子: 7.299
参与作者:
备注:
摘要:

Despite the role of polyploidy in multiple evolutionary processes, its impact on plant diversification remains controversial. An increased polyploid frequency may facilitate speciation through shifts in ecology, morphology, or both. Here we used Allium to evaluate (1) the relationship between intraspecific polyploid frequency and species diversification rate and (2) whether this process is associated with habitat and/or trait shifts.

Using eight plastid and nuclear ribosomal markers, we built a phylogeny of 448 Allium species, representing 46% of the total. We quantified intraspecific ploidy diversity, heterogeneity in diversification rates, and their relationship along the phylogeny using traitdependent diversification models. Finally, we evaluated the association between polyploidization and habitat or trait shifts.

We detected high ploidy diversity in Allium and a polyploidyrelated diversification rate shift with a probability of 95% in East Asia. Allium lineages with high polyploid frequencies had higher species diversification rates than those of diploids or lineages with lower polyploid frequencies. Shifts in speciation rates were strongly correlated with habitat shifts linked to particular soil conditions; 81.7% of edaphic variation could be explained by polyploidization.

Our study emphasizes the role of intraspecific polyploid frequency combined with ecological drivers on Allium diversification, which may explain plant radiations more generally.
论文下载: 下载地址
   

关闭窗口

返回首页

数字标本.png
东南亚中心2.jpg
前往中国植物园联盟网站
W020160606696316538360.jpg
屏幕快照 2018-07-04 09.56.59.png