Analysis of ancestry heterozygosity suggests that hybrid incompatibilities in threespine stickleback are environment-dependent

Ken Thompson, Catherine Peichel, Diana Rennison, Matthew McGee, Arianne Albert, Timothy Vines, Anna Greenwood, Abigail Wark, Yaniv Brandvain, Molly Schumer & Dolph Schluter
Hybrid incompatibilities occur when interactions between opposite-ancestry alleles at different loci reduce the fitness of hybrids. Most work on incompatibilities has focused on those that are 'intrinsic', meaning they affect viability and sterility in the laboratory. Theory predicts that ecological selection can also underlie hybrid incompatibilities, but tests of this hypothesis using sequence data are scarce. In this article, we compiled genetic data for F2 hybrid crosses between divergent populations of threespine stickleback fish (Gasterosteus...
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