Bounds to parapatric speciation: A Dobzhansky-Muller incompatibility model involving autosomes, X chromosomes, and mitochondria

被引:14
作者
Hoellinger, Ilse [1 ,2 ,3 ]
Hermisson, Joachim [1 ,2 ]
机构
[1] Univ Vienna, Fac Math, Math & BioSci Grp, Vienna, Austria
[2] Univ Vienna, Max F Perutz Labs, Vienna, Austria
[3] Vienna Grad Sch Populat Genet, Vienna, Austria
基金
奥地利科学基金会;
关键词
Hybrid incompatibility; Introgression on X and autosomes; Large X-effect; Speciation-with-gene-flow; Two-locus DMI; CONTINENT-ISLAND MODEL; HYBRID MALE-STERILITY; GENE-FLOW; ECOLOGICAL SPECIATION; HOUSE MOUSE; DROSOPHILA-MELANOGASTER; REPRODUCTIVE ISOLATION; POSTZYGOTIC ISOLATION; DOSAGE COMPENSATION; POSITIVE SELECTION;
D O I
10.1111/evo.13223
中图分类号
Q14 [生态学(生物生态学)];
学科分类号
071012 ; 0713 ;
摘要
We investigate the conditions for the origin and maintenance of postzygotic isolation barriers, so called (Bateson-)Dobzhansky-Muller incompatibilities or DMIs, among populations that are connected by gene flow. Specifically, we compare the relative stability of pairwise DMIs among autosomes, X chromosomes, and mitochondrial genes. In an analytical approach based on a continent-island framework, we determine how the maximum permissible migration rates depend on the genomic architecture of the DMI, on sex bias in migration rates, and on sex-dependence of allelic and epistatic effects, such as dosage compensation. Our results show that X-linkage of DMIs can enlarge the migration bounds relative to autosomal DMIs or autosome-mitochondrial DMIs, in particular in the presence of dosage compensation. The effect is further strengthened with male-biased migration. This mechanism might contribute to a higher density of DMIs on the X chromosome (large X-effect) that has been observed in several species clades. Furthermore, our results agree with empirical findings of higher introgression rates of autosomal compared to X-linked loci.
引用
收藏
页码:1366 / 1380
页数:15
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