Analysis of complete mitochondrial genome sequences increases phylogenetic resolution of bears (Ursidae), a mammalian family that experienced rapid speciation |
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Authors: | Li Yu Yi-Wei Li Oliver A Ryder Ya-Ping Zhang |
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Institution: | (1) Laboratory for Conservation and Utilization of Bio-resource, Yunnan University, Kunming, 650091, China;(2) State Key Laboratory of Genetic Resource and Evolution, Kunming Institute of Zoology, Kunming, 650223, China;(3) Conservation and Research for Endangered Species, Zoological Society of San Diego, PO Box 551, San Diego, CA 92112, USA |
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Abstract: | Background Despite the small number of ursid species, bear phylogeny has long been a focus of study due to their conservation value,
as all bear genera have been classified as endangered at either the species or subspecies level. The Ursidae family represents
a typical example of rapid evolutionary radiation. Previous analyses with a single mitochondrial (mt) gene or a small number
of mt genes either provide weak support or a large unresolved polytomy for ursids. We revisit the contentious relationships
within Ursidae by analyzing complete mt genome sequences and evaluating the performance of both entire mt genomes and constituent
mtDNA genes in recovering a phylogeny of extremely recent speciation events. |
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