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Time of the secondary contact

Posted by croux on 15 Nov 2013 at 13:15 GMT

According to another "first inference of divergence history from genome-wide data in non-model species" (http://mbe.oxfordjournals...), the authors (including myself) have shown that neglected the effects of genomic heterogeneity in introgression rates can bias demographic inferences and leads sometimes to the statistical support of a different scenario of speciation.
Given the unambiguous relative posterior probability of the best-supported model, in association with the appropriate controls made by Nadachowska-Brzyska et al., I have no doubt about a secondary contact between the two flycatcher species. But, maybe taking into account the genomic variation in effective migration rates due to the accumulation of some species barriers during the early times of divergence (when species evolved in strict isolation) should produce a most informative posterior distribution concerning the time of secondary contact. Thereby, it should be possible to test for the LGM hypothesis suggested in this paper.

No competing interests declared.