Restricted X chromosome introgression and support for Haldane's rule in hybridizing damselflies.

ABSTRACT: Contemporary hybrid zones act as natural laboratories for the investigation of species boundaries and may shed light on the little understood roles of sex chromosomes in species divergence. Sex chromosomes are considered to function as a hotspot of genetic divergence between species; indicated by less genomic introgression compared to autosomes during hybridization. Moreover, they are thought to contribute to Haldane's rule, which states that hybrids of the heterogametic sex are more likely to be inviable or sterile. To test these hypotheses, we used contemporary hybrid zones of Ischnura elegans, a damselfly species that has been expanding its range into the northern and western regions of Spain, leading to chronic hybridization with its sister species Ischnura graellsii. We

SUBMITTER: Swaegers J 

PROVIDER: S-EPMC9297008 | biostudies-literature | 2022 Jul

REPOSITORIES: biostudies-literature