Historical and current introgression in a Mesoamerican hummingbird species complex: a biogeographic perspective

PeerJ
Rosa Alicia Jiménez, Juan Francisco Ornelas

Abstract

The influence of geologic and Pleistocene glacial cycles might result in morphological and genetic complex scenarios in the biota of the Mesoamerican region. We tested whether berylline, blue-tailed and steely-blue hummingbirds, Amazilia beryllina, Amazilia cyanura and Amazilia saucerottei, show evidence of historical or current introgression as their plumage colour variation might suggest. We also analysed the role of past and present climatic events in promoting genetic introgression and species diversification. We collected mitochondrial DNA (mtDNA) sequence data and microsatellite loci scores for populations throughout the range of the three Amazilia species, as well as morphological and ecological data. Haplotype network, Bayesian phylogenetic and divergence time inference, historical demography, palaeodistribution modelling, and niche divergence tests were used to reconstruct the evolutionary history of this Amazilia species complex. An isolation-with-migration coalescent model and Bayesian assignment analysis were assessed to determine historical introgression and current genetic admixture. mtDNA haplotypes were geographically unstructured, with haplotypes from disparate areas interdispersed on a shallow tree and an unre...Continue Reading

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Datasets Mentioned

BETA
EU042523
GU167205
EU042526

Methods Mentioned

BETA
PCR

Software Mentioned

R package ADEgenet
MIGRATE
BEAST
SEQUENCHER
ARLEQUIN
CCSM
R vegan
SE
MIROC
jMODELTEST

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