2018
DOI: 10.1371/journal.pone.0199113
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Abstract: Postzygotic reproductive isolation may become strong only once the process of speciation is in its advanced stages. For taxa in the early stages of speciation, prezygotic reproductive isolation barriers may play a predominant role in maintaining species boundaries. Here, we study the recent capuchino seedeater biological radiation, a group of highly sympatric species from the genus Sporophila that have diversified during the Pleistocene in Neotropical grasslands. Capuchinos can be diagnosed by adult male color… Show more

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Cited by 14 publications
(18 citation statements)
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“…Sexual selection would also be consistent with our observations suggesting that many loci have experienced sweeps in parallel in different species. We note that there is now strong evidence-including genetic, behavioral, coloration, song and captive breeding data [66][67][68][69] -that these are truly distinct species, not artificial taxonomic constructs based on superficial morphological features.…”
Section: Discussionmentioning
confidence: 87%
“…Sexual selection would also be consistent with our observations suggesting that many loci have experienced sweeps in parallel in different species. We note that there is now strong evidence-including genetic, behavioral, coloration, song and captive breeding data [66][67][68][69] -that these are truly distinct species, not artificial taxonomic constructs based on superficial morphological features.…”
Section: Discussionmentioning
confidence: 87%
“…These can range from mild to severe, but the simulation results show that only a small reduction in hybrid fitness has a powerful effect in limiting the blending of two species. Sexual and social selection may be especially prone to lead to hybrids having characteristics that are not simply a blending of the two species but rather are surprising and outside the range of variation in the parental forms (i.e., "transgressive" traits; Rieseberg et al 1999;Dittrich-Reed and Fitzpatrick 2013;Campagna et al 2018). Finally, the simulations demonstrate that assortative mating itself can result in a form of selection against intermediate hybrids, due to rare-type disadvantage (e.g., Bridle et al 2006).…”
Section: Discussionmentioning
confidence: 99%
“…These can range from mild to severe, but the simulation results show that only a small reduction in hybrid fitness has a powerful effect in limiting the blending of two species. Sexual and social selection may be especially prone to lead to hybrids having characteristics that are not simply a blending of the two species but rather are surprising and outside the range of variation in the parental forms (i.e., "transgressive" traits; Rieseberg et al 1999;Dittrich-Reed and Fitzpatrick 2013;Campagna et al 2018). Finally, assortative mating itself can result in a form of selection against intermediate hybrids, due to rare-type disadvantage (e.g., Bridle et al 2006).…”
Section: Cline Width (Functional Loci)mentioning
confidence: 99%