Environment-specific heterozygote deficiency and developmental instability in hybrid Mytilus
In: Marine Biology Research. Taylor & Francis: Oslo; Basingstoke. ISSN 1745-1000; e-ISSN 1745-1019, meer
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| Trefwoorden |
Mytilus Linnaeus, 1758 [WoRMS]
Marien/Kust |
| Author keywords |
developmental stability; environment-dependent selection; heterozygotedeficiency; Mytilus |
| Auteurs | | Top |
- Springer, S.A.
- Heath, D.D.
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| Abstract |
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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