Molecular systematics of pikas (genus Ochotona) inferred from mitochondrial DNA sequences | |
Yu N[*]1,2,3; Zheng CL2; Zhang YP1; Li WH3 | |
刊名 | MOLECULAR PHYLOGENETICS AND EVOLUTION
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2000 | |
卷号 | 16期号:1页码:85-95 |
通讯作者 | ningyu@midway.uchicago.edu |
英文摘要 | The phylogenetic relationships among worldwide species of genus Ochotona were investigated by sequencing mitochondrial cytochrome b and ND4 genes. Parsimony and neighbor-joining analyses of the sequence data yielded congruent results that strongly indicated three major clusters: the shrub-steppe group, the northern group, and the mountain group. The subgeneric classification of Ochotona species needs to be revised because each of the two subgenera in the present classification contains species from the mountain group. To solve this taxonomic problem so that each taxon is monophyletic, i.e., represents a natural clade, Ochotona could be divided into three subgenera, one for the shrub-steppe species, a second for the northern species, and a third for the mountain species. The inferred tree suggests that the differentiation of this genus in the Palearctic Region was closely related to the gradual uplifting of the Tibet (Qinghai-Xizang) Plateau, as hypothesized previously, and that vicariance might have played a major role in the differentiation of this genus on the Plateau, On the other hand, the North American species, O. princeps, is most likely a dispersal event, which might have happened during the Pliocene through the opening of the Bering Strait. The phylogenetic relationships within the shrub-steppe group are worth noting in that instead of a monophyletic shrub-dwelling group, shrub dwellers and steppe dwellers are intermingled with each other. Moreover, the sequence divergence within the sister tars of one steppe? dweller and one shrub dweller is very low. These findings support the hypothesis that pikes have entered the steppe environment several times and that morphological similarities within steppe dwellers were due to convergent evolution. |
收录类别 | SCI |
资助信息 | This work was supported by the National Natu- ral Sciences Foundation of China (3987012), by the Laboratory of Cellular and Molecular Evolution, Kunming Institute of Zoology, the Chinese Academy of Sciences, and by NIH grants (W.-H. Li). |
语种 | 英语 |
内容类型 | 期刊论文 |
源URL | [http://159.226.149.26:8080/handle/152453/10646] ![]() |
专题 | 昆明动物研究所_分子进化基因组学 昆明动物研究所_细胞与分子进化重点实验室 |
作者单位 | 1.Key Laboratory of Cellular and Molecular Evolution, Kunming Institute of Zoology, The Chinese Academy of Sciences, Kunming 650223, China 2.Northwest Plateau Institute of Biology, The Chinese Academy of Sciences, Xining 810001, China 3.Department of Ecology and Evolution, University of Chicago, 1101 East 57th Street, Chicago, Illinois60637 |
推荐引用方式 GB/T 7714 | Yu N[*],Zheng CL,Zhang YP,et al. Molecular systematics of pikas (genus Ochotona) inferred from mitochondrial DNA sequences[J]. MOLECULAR PHYLOGENETICS AND EVOLUTION,2000,16(1):85-95. |
APA | Yu N[*],Zheng CL,Zhang YP,&Li WH.(2000).Molecular systematics of pikas (genus Ochotona) inferred from mitochondrial DNA sequences.MOLECULAR PHYLOGENETICS AND EVOLUTION,16(1),85-95. |
MLA | Yu N[*],et al."Molecular systematics of pikas (genus Ochotona) inferred from mitochondrial DNA sequences".MOLECULAR PHYLOGENETICS AND EVOLUTION 16.1(2000):85-95. |
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