Polyploid plants have faster rates of multivariate niche differentiation than their diploid relatives
Polyploid plants have faster rates of multivariate niche differentiation than their diploid relatives
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DOI：
10.1111/ele.13402
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发表时间：
2020-01-01
期刊：
影响因子：
8.8
通讯作者：
Barker, Michael S.
中科院分区：
文献类型：
--
作者：
Baniaga, Anthony E.;Marx, Hannah E.;Barker, Michael S.
多倍体物种形成需要大量和快速的合子后生殖隔离初生物种，这些物种最初与父母之一或双方共处。尽管有很强的合子后隔离，生态位分化一直被认为是多倍体成功的重要因素。利用维管束植物的生物地理数据，我们检验了多倍体物种的气候生态位是否比它们的二倍体近缘物种分化得更快，以及多倍体物种的气候生态位分化是否比相关的二倍体物种快。我们发现，多倍体与其二倍体亲本的气候差异往往比二倍体彼此之间的气候差异更大。与这一模式一致，我们估计多倍体物种通常比它们的二倍体近亲具有更高的多变量生态位分化率。与最近的分析相比，我们的结果证实了生态位分化是多倍体物种形成的重要组成部分，并且多倍体的生态位分化通常明显快于多倍体。
Polyploid speciation entails substantial and rapid postzygotic reproductive isolation of nascent species that are initially sympatric with one or both parents. Despite strong postzygotic isolation, ecological niche differentiation has long been thought to be important for polyploid success. Using biogeographic data from across vascular plants, we tested whether the climatic niches of polyploid species are more differentiated than their diploid relatives and if the climatic niches of polyploid species differentiated faster than those of related diploids. We found that polyploids are often more climatically differentiated from their diploid parents than the diploids are from each other. Consistent with this pattern, we estimated that polyploid species generally have higher rates of multivariate niche differentiation than their diploid relatives. In contrast to recent analyses, our results confirm that ecological niche differentiation is an important component of polyploid speciation and that niche differentiation is often significantly faster in polyploids.