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- W1540579219 endingPage "2017" @default.
- W1540579219 startingPage "2005" @default.
- W1540579219 abstract "Deciphering the genetic and developmental causes of the disproportionate rarity, inviability, and sterility of hybrid males, Haldane's rule, is important for understanding the evolution of reproductive isolation between species. Moreover, extrinsic and prezygotic factors can contribute to the magnitude of intrinsic isolation experienced between species with partial reproductive compatibility. Here, we use the nematodes Caenorhabditis briggsae and C. nigoni to quantify the sensitivity of hybrid male viability to extrinsic temperature and developmental timing, and test for a role of mito-nuclear incompatibility as a genetic cause. We demonstrate that hybrid male inviability manifests almost entirely as embryonic, not larval, arrest and is maximal at the lowest rearing temperatures, indicating an intrinsic-by-extrinsic interaction to hybrid inviability. Crosses using mitochondrial substitution strains that have reciprocally introgressed mitochondrial and nuclear genomes show that mito-nuclear incompatibility is not a dominant contributor to postzygotic isolation and does not drive Haldane's rule in this system. Crosses also reveal that competitive superiority of X-bearing sperm provides a novel means by which postmating prezygotic factors exacerbate the rarity of hybrid males. These findings highlight the important roles of gametic, developmental, and extrinsic factors in modulating the manifestation of Haldane's rule." @default.
- W1540579219 created "2016-06-24" @default.
- W1540579219 creator A5011015519 @default.
- W1540579219 creator A5046527761 @default.
- W1540579219 creator A5089923592 @default.
- W1540579219 date "2015-07-17" @default.
- W1540579219 modified "2023-10-12" @default.
- W1540579219 title "Gametic selection, developmental trajectories, and extrinsic heterogeneity in Haldane's rule" @default.
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