Extensive Rangewide Mitochondrial Introgression Indicates Substantial Cryptic Hybridization in the Golden-winged Warbler (Vermivora chrysoptera)

Avian Conservation and Ecology

RonCanterbury,¹  JeffreyLarkin,²  Lesley P Bulluck,³  Steven L Van Wilgenburg,⁴  RachelVallender,⁵  Irby J Lovette,⁵  AmberRoth,⁶  R. MonicaFowlds,⁷ 

[1] Department of Biological Sciences, University of Cincinnati;Department of Biology, Indiana University of Pennsylvania;Department of Biology, Virginia Commonwealth University;Environment Canada;Fuller Evolutionary Biology Program, Cornell Laboratory of Ornithology;School of Forest Resources and Environmental Science, Michigan Technological University;University of Wisconsin

关键词: Blue-winged Warbler;    conservation;    genetic introgression;    Golden-winged Warbler;    hybridization;    Vermivora chrysoptera;    Vermivora pinus.;   

DOI  :  10.5751/ACE-00326-040204

学科分类：社会科学、人文和艺术（综合）

来源: Resilience Alliance Publications

【 摘 要 】

Widespread population declines of the Golden-winged Warbler (Vermivora chrysoptera) are thought to be due in part to hybridization with the expanding Blue-winged Warbler (V. pinus), which predictably replaces Golden-winged Warblers at breeding sites in which the two species come into contact. However, the mechanism by which this replacement occurs remains unresolved. Recent genetic work has indicated that, even in areas where the two species have been in contact for a short period, introgression of Blue-winged mitochondrial (mtDNA) and nuclear genes into Golden-winged individuals is common. To explore this process on a broader scale, we screened more than 750 individuals from nine U.S. states and three provinces to examine geographic patterns of mtDNA introgression. The only population in which all phenotypic Golden-winged Warblers had Golden-winged mtDNA haplotypes, and in which there are no breeding Blue-winged or hybrid individuals, was in the province of Manitoba, near the northwestern edge of the species

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