期刊
MOLECULAR ECOLOGY
卷 30, 期 19, 页码 4819-4832出版社
WILEY
DOI: 10.1111/mec.16085
关键词
hybridization; introgression; lepidoptera; phylogeography; Z chromosome
资金
- Russian Science Foundation [19-14-00202]
- Russian Science Foundation [19-14-00202] Funding Source: Russian Science Foundation
Introgressive hybridization is more common in nature than previously thought, occurring more frequently in sympatric populations of recently diverged taxa. The study on Levant fritillary butterflies shows significant unidirectional gene flow from a distant congener Melitaea didyma to M. acentria, despite at least 5 million years of independent evolution. Elevated differentiation and lower level of introgression on the Z chromosome suggest intrinsic postzygotic barriers.
Introgressive hybridization is more common in nature than previously thought, and its role and creative power in evolution is hotly discussed but not completely understood. Introgression occurs more frequently in sympatry between recently diverged taxa, or when the speciation process has not yet been completed. However, there are relatively few documented cases of hybridization that erodes reproductive barriers between distantly related species. Here, we use whole genome and mitochondrial data to examine how introgression from a distant congener affects pattern of genetic differentiation in the Levant fritillary butterfly Melitaea acentria. We show that this local taxon has evolved as a peripatric geographic isolate of the widespread Melitaea persea, and that there has been significant unidirectional gene flow from the sympatric, nonclosely related Melitaea didyma to M. acentria. We found direct evidence of ongoing sporadic hybridization between M. didyma and M. acentria, which are separated by at least 5 million years of independent evolution. Elevated differentiation and lower level of introgression on the sex Z chromosome compared to autosomes suggest that the Z chromosome has accumulated loci acting as intrinsic postzygotic barriers. Our results show that introgression from M. didyma has been an additional source of nucleotide diversity in the M. acentria population, providing material for drift and selection.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据