Evaluation of genetic isolation within an island flora reveals unusually widespread local adaptation and supports sympatric speciation.
Evaluation of genetic isolation within an island flora reveals unusually widespread local adaptation and supports sympatric speciation.
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DOI：
10.1098/rstb.2013.0342
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发表时间：
2014-08-05
期刊：
影响因子：
--
通讯作者：
Savolainen V
中科院分区：
文献类型：
--
作者：
Papadopulos AS;Kaye M;Devaux C;Hipperson H;Lighten J;Dunning LT;Hutton I;Baker WJ;Butlin RK;Savolainen V
现在人们认识到，即使基因流反对趋异的自然选择，物种形成也能继续进行。了解环境梯度和地理距离在多大程度上可以限制物种内的基因流动，可以揭示在种群分化和物种形成的早期阶段，选择和扩散限制的相对作用。在遥远的豪勋爵岛（澳大利亚），基因流的生态物种形成被认为发生在几个植物属中。本研究的目的是确定环境隔离（IBE）和群落隔离（IBC）对来自许多远亲科的19种植物遗传结构的贡献，这些植物在可比的时间尺度上受到了类似的环境压力。我们应用基于个体的多变量模型平均方法来量化IBE和IBC，同时控制隔离距离（IBD）。我们的分析表明，所有物种都经历了一定程度的生态驱动的隔离，而只有12的19个物种受到IBD。IBE在这些植物物种中的流行表明，在植物中的分歧选择经常产生当地的适应和支持的假设，生态分歧可以驱动物种的同域性。
It is now recognized that speciation can proceed even when divergent natural selection is opposed by gene flow. Understanding the extent to which environmental gradients and geographical distance can limit gene flow within species can shed light on the relative roles of selection and dispersal limitation during the early stages of population divergence and speciation. On the remote Lord Howe Island (Australia), ecological speciation with gene flow is thought to have taken place in several plant genera. The aim of this study was to establish the contributions of isolation by environment (IBE) and isolation by community (IBC) to the genetic structure of 19 plant species, from a number of distantly related families, which have been subjected to similar environmental pressures over comparable time scales. We applied an individual-based, multivariate, model averaging approach to quantify IBE and IBC, while controlling for isolation by distance (IBD). Our analyses demonstrated that all species experienced some degree of ecologically driven isolation, whereas only 12 of 19 species were subjected to IBD. The prevalence of IBE within these plant species indicates that divergent selection in plants frequently produces local adaptation and supports hypotheses that ecological divergence can drive speciation in sympatry.
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DOI：
10.1111/j.1471-8286.2006.01380.x
发表时间：
2006-09-01
期刊：
MOLECULAR ECOLOGY NOTES
影响因子：
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作者：
Ehrich, Dorothee
通讯作者：
Ehrich, Dorothee
影响因子：
3.3
作者：
LISTER, BC
通讯作者：
LISTER, BC
影响因子：
2.9
作者：
MACARTHUR R;LEVINS, R
通讯作者：
LEVINS, R
DOI：
10.1046/j.1471-8286.2002.00305.x
发表时间：
2002-12-01
期刊：
MOLECULAR ECOLOGY NOTES
影响因子：
--
作者：
Hardy, OJ;Vekemans, X
通讯作者：
Vekemans, X
影响因子：
4.9
作者：
Funk, Daniel J.;Egan, Scott P.;Nosil, Patrik
通讯作者：
Nosil, Patrik