Recent speciation in the orchard oriole group: Divergence of Icterus spurius spurius and Icterus spurius fuertesi

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Show simple item record Baker, JM Navarro Sigüenza, Adolfo Gerardo RojasSoto, OR Omland, KE LópezMedrano, E 20110122T10:26:45Z 20110122T10:26:45Z 2003
dc.identifier.issn 48038
dc.description.abstract New World orioles (Icterus) include several closely related species and subspecies pairs that provide excellent opportunities for studying recent speciation. We examined a subspecies pair in the Orchard Oriole group: Orchard Oriole (l. spurius spurius), a longdistance migrant that breeds in eastern North America, and Fuertes's Oriole (l. s. fuertesi), a shortdistance migrant that breeds in a restricted range in Veracruz, Mexico. We sequenced parts of the mitochondrial cytochromeb gene (925 base pairs) and control region (344 base pairs) freom 23 Orchard Orioles and 7 Fuertes's Orioles. Subspecies are not reciprocally monophyletic. Instead, our data suggest that at least one taxon is paraphyletic or polyphyletic. We found little support for any further phylogenetic structure, including whether one subspecies might be derived freom the other. However, haplotype freequency analysis suggests that there is little or no current gene flow between the taxa. The phylogenetic relationship between Orchard and Fuertes's orioles is likely a result of recent divergence and incomplete lineage sorting. That interpretation is consistent with theoretical models of speciation, which predict patterns of nonmonophyly at early stages of taxon divergence. Our findings suggest that Orchard and Fuertes's orioles are separate species and provide a case study for evaluating the importance of monophyly in defining species limits. en_US
dc.language.iso fre en_US
dc.title Recent speciation in the orchard oriole group: Divergence of Icterus spurius spurius and Icterus spurius fuertesi
dc.type Artículo de investigación en_US
dc.identifier.idprometeo 1967
dc.source.novolpages 120(3): 848-859
dc.subject.wos Ornithology
dc.description.index WoS: SCI, SSCI o AHCI
dc.relation.journal Auk
dc.description.Departamento Departamento de Biología Evolutiva
dc.relation.Instadscription Facultad de Ciencias, UNAM

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