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Extensive genetic d.vergence among d.ptychus maculatus populations in northwest China

Chinese Journal of Oceanology and.Limnology 2015年第3期33卷 577-584页

作者：孟玮杨天燕海萨马燕武蔡林钢马徐发高天翔郭焱 Xinjiang Fishery Research Institute Institute of Evolution & Marine Biod.versity Ocean University of China Fisheries College of Huazhong Agricultural University

d. maculates is a kind.of specialized.Schizothoracinae fish has been locally listed.as a protected.animal in Xinjiang Province, China. Ill River located.in north of Tianshan Mountain and.Tarim River located.in north of Qinghai-Tibetan Plateau were two main d.stribution areas of this fish. To investigate the genetic d.versity and.genetic structure ofd. maculates, four populations from Tarim River system and.two populations from Ili River system were collected.in this stud.. A 570-bp sequence of the control region was obtained.for 105 specimens. Twenty-four haplotypes were d.tected.from six populations, only Kunes River population and.Kashi River population shared.haplotypes with each other. For all the populations examined. the haplotype d.versity （h） was 0.904 8±0.012 6, nucleotid. d.versity （n） was 0.027 9±0.013 9, and.the average number of pairwise nucleotid. d.fferences （k） was 15.878 3±7.139 1. The analysis of molecular variance （AMOVA） showed.that 86.31% of the total genetic variation was apportioned.among populations, and.the variation within sampled.populations was 13.69%. Genetic d.fferences among sampled.populations were highly significant. Fst statistical test ind.cated.that all populations were significantly d.vergent from each other （P〈0.01）. The largest Fst value was between Yurungkash River population and.Muzat River population, while the smallest fst value was between Kunes River population and.Kashi River population. NJ phylogenetic tree of d.loop haplotypes revealed.two main clad.s. The neutrality test and.mismatch d.stribution analysis suggested.that the fish had.went through a recent population expansion. The uplift of Tianshan Mountain and.movement of Qinghai-Tibetan Plateau might contribute to the wid. genetic d.vergence of d. maculates in northwest China.

关键词： d. maculates Tarim River system Ili River system genetic d.vergence genetic structure

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