期刊
ECOLOGY LETTERS
卷 21, 期 2, 页码 264-274出版社
WILEY
DOI: 10.1111/ele.12891
关键词
Adaptive radiation; ecological speciation; evolutionary simulation; hybridization; individual-based model; sympatric speciation; transgressive segregation
类别
资金
- Japan Society for the Promotion of Science [KAKENHI 15K07228]
Understanding the mechanisms of rapid adaptive radiation has been a central problem of evolutionary ecology. Recently, there is a growing recognition that hybridization between different evolutionary lineages can facilitate adaptive radiation by creating novel phenotypes. Yet, theoretical plausibility of this hypothesis remains unclear because, for example, hybridization can negate pre-existing species richness. Here, we theoretically investigate whether and under what conditions hybridization promotes ecological speciation and adaptive radiation using an individual-based model to simulate genome evolution following hybridization between two allopatrically evolved lineages. The model demonstrated that transgressive segregation through hybridization can facilitate adaptive radiation, most powerfully when novel vacant ecological niches are highly dissimilar, phenotypic effect size of mutations is small and there is moderate genetic differentiation between parental lineages. These results provide a theoretical basis for the effect of hybridization facilitating adaptive radiation.
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