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Variation in mitochondrial DNA and phylogeny of six species of pikas (Ochotona)
Yu Ning; Zheng Changlin; Shi Liming
1997
Source PublicationJOURNAL OF MAMMALOGY
Volume78Issue:2Pages:387-396
AbstractPhylogenetic relationships of six species of Ochotona were investigated using mitochondrial DNA (mtDNA) restriction-site analysis. The phylogenetic tree constructed using PAUP was based on 62 phylogenetically informative sites with O. erythrotis designated as an outgroup. Two clades were evident. One contained O. curzoniae, O. huangensis, and O. thibetana. in the second, O. daurica was a sister taxon of O. cansus. The five species appear to come from different maternal lineages. The branching structure of the tree and sequence divergence confirm that huangensis and cansus are distinct species, and that mol-osa is a synonym of O. cansus rather than O. thibetana. Divergence time, estimated from genetic distances, indicates that the ancestors of the two maternal lineages diverged ca. 6.5 x 10(6) years ago. O. curzoniae diverged from O. huangensis, and O. daurica diverged from O. cansus, at about the same time (ca. 3.4 x 10(6) years ago). These data suggest a period of rapid radiation of the genus Ochotona in China, perhaps during the late Pliocene. These calculations correspond roughly to tectonic events and environmental changes in China throughout this period, and appear to be substantiated by the fossil record.; Phylogenetic relationships of six species of Ochotona were investigated using mitochondrial DNA (mtDNA) restriction-site analysis. The phylogenetic tree constructed using PAUP was based on 62 phylogenetically informative sites with O. erythrotis designated as an outgroup. Two clades were evident. One contained O. curzoniae, O. huangensis, and O. thibetana. in the second, O. daurica was a sister taxon of O. cansus. The five species appear to come from different maternal lineages. The branching structure of the tree and sequence divergence confirm that huangensis and cansus are distinct species, and that mol-osa is a synonym of O. cansus rather than O. thibetana. Divergence time, estimated from genetic distances, indicates that the ancestors of the two maternal lineages diverged ca. 6.5 x 10(6) years ago. O. curzoniae diverged from O. huangensis, and O. daurica diverged from O. cansus, at about the same time (ca. 3.4 x 10(6) years ago). These data suggest a period of rapid radiation of the genus Ochotona in China, perhaps during the late Pliocene. These calculations correspond roughly to tectonic events and environmental changes in China throughout this period, and appear to be substantiated by the fossil record.
KeywordOchotona
Subject Area动物学
Indexed BySCI
Language英语
Document Type期刊论文
Identifierhttp://210.75.249.4/handle/363003/1440
Collection中国科学院西北高原生物研究所
Recommended Citation
GB/T 7714
Yu Ning,Zheng Changlin,Shi Liming. Variation in mitochondrial DNA and phylogeny of six species of pikas (Ochotona)[J]. JOURNAL OF MAMMALOGY,1997,78(2):387-396.
APA Yu Ning,Zheng Changlin,&Shi Liming.(1997).Variation in mitochondrial DNA and phylogeny of six species of pikas (Ochotona).JOURNAL OF MAMMALOGY,78(2),387-396.
MLA Yu Ning,et al."Variation in mitochondrial DNA and phylogeny of six species of pikas (Ochotona)".JOURNAL OF MAMMALOGY 78.2(1997):387-396.
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