The utility of nuclear introns for investigating hybridization and genetic introgression: a case study involving Brachyramphus murrelets

Pacheco, N.M., Congdon, B.C., and Friesen, V.L. (2002) The utility of nuclear introns for investigating hybridization and genetic introgression: a case study involving Brachyramphus murrelets. Conservation Genetics, 3 (2). pp. 175-182.

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Abstract

Interspecific hybridization can have importantconsequences for conservation, but can bedifficult to detect using morphologicalmarkers. To test the utility of nuclear intronsfor investigating hybridization and geneticintrogression, we analyzed variation in fivenuclear introns and the mitochondrialcytochrome b gene in two species ofseabirds that are declining and may behybridizing: marbled murrelets(Brachyramphus marmoratus) and Kittlitz'smurrelets (B. brevirostris). No alleleswere shared between samples of the two species,and intron alleles formed reciprocallymonophyletic groups in gene trees. Our resultssuggest that few murrelets in Alaska areF 1, F 2or back-cross hybrids,and that gene pools of these species have beenindependent for 1.8 to 5.7 million years. Weconclude that introns are a potentially richsource of markers for analyzing hybridizationand introgression in endangered or decliningspecies.

Item ID: 12117
Item Type: Article (Research - C1)
ISSN: 1572-9737
Keywords: Brachyramphus; cytochrome b; hybridization; introgression; intron; single nucleotide polymorphisms
Date Deposited: 08 Dec 2010 23:11
FoR Codes: 05 ENVIRONMENTAL SCIENCES > 0502 Environmental Science and Management > 050202 Conservation and Biodiversity @ 100%
SEO Codes: 96 ENVIRONMENT > 9608 Flora, Fauna and Biodiversity > 960899 Flora, Fauna and Biodiversity of Environments not elsewhere classified @ 100%
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