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Environment-specific heterozygote deficiency and developmental instability in hybrid Mytilus
Springer, S.A.; Heath, D.D. (2007). Environment-specific heterozygote deficiency and developmental instability in hybrid Mytilus. Mar. Biol. Res. 3(3): 182-187.
In: Marine Biology Research. Taylor & Francis: Oslo; Basingstoke. ISSN 1745-1000, more
Peer reviewed article  

Available in  Authors 

    Mytilus Linnaeus, 1758 [WoRMS]; Marine

Authors  Top 
  • Springer, S.A.
  • Heath, D.D.

    The multiple discrete hybrid zones that characterize Mytilus blue mussels allow a novel, non-manipulative, examination of the selective pressures that create and maintain species. If endogenous genetic incompatibility is solely responsible for post-zygotic isolation, then individuals of a specified hybrid genotype are expected to show similar average fitness across environments. However, if hybrid fitness differs across environments, then exogenous selection is implicated, either via ecological selection or environment-specific expression of intrinsic genetic incompatibilities. Correspondence between developmental instability of hybrids and heterozygote deficiency, estimated in two M. trossulus x M. galloprovincialis hybrid zones on the coast of North America, indicates that environment-dependent selection against hybrids may contribute to reproductive isolation among Pacific Mytilus species.

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