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Data from: Heterozygosity-fitness correlations in a migratory bird: an analysis of inbreeding and single-locus effects
负责人:
Harrison, Xavier
关键词:
MCMCglmm Inbreeding Ecological Genetics internal relatedness
DOI:
doi:10.5061/dryad.52dk8
摘要:
antly more variation than a model with multi-locus heterozygosity as a single predictor. Collectively these results lend support to the hypothesis tha
Data from: Divergent natural selection drives the evolution of reproductive isolation in an Australian wildflower
负责人:
关键词:
MCMCglmm;ecological speciation;postzygotic isolation;Senecio lautus;Senecio;reciprocal transplant
DOI:
doi:10.5061/dryad.17h0t
摘要:
Ecological speciation occurs when reproductive isolation evolves between populations adapting to contrasting environments. A key prediction of this process is that the fitness of hybrids between divergent populations should be reduced in each parental environment as a function of the proportion of local genes they carry, a process resulting in ecologically dependent reproductive isolation (RI). To test this prediction, we use reciprocal transplant experiments between adjacent populations of an Australian wildflower, Senecio lautus, at two locations to distinguish between ecologically dependent and intrinsic genetic reproductive barriers. These barriers can be distinguished by observing the relative fitness of reciprocal backcross hybrids, as they differ in the contribution of genes from either parent while controlling for any intrinsic fitness effects of hybridization. We show ecologically dependent fitness effects in establishment and survival of backcrosses in one transplant experiment, and growth performance in the second transplant experiment. These results suggests natural selection can create strong reproductive barriers that maintain differentiation between populations with the potential to interbreed, and implies a significant role for ecology in the evolutionary divergence of S. lautus.

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