Research on genetic diversities of Asiatic beaver (Castor fiber birulai)on mtDNA D-loop HV-Ⅰin Xinjiang, China
- DU Cong-cong, ZHAO Jing, CHU Hong-jun, LIU Yuan-chao,DUAN Xiao-nan, CHEN Gang
JOURNAL OF SHANDONG UNIVERSITY(NATURAL SCIENCE). 2016, 51(3):
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Genetic diversities of Asiatic beaver(Castor fiber)in Xinjiang was investigated by analyzing the HV-Ⅰ sequences of the mitochondrial DNA control region(D-loop)of 16 individuals from the Ulungur watershed of Xinjiang in China. Results showed that the length of mtDNA D-loop HV-Ⅰ sequence of Xinjiang beaver was 569 bp, with nucleotide frequencies of 27.0%,32.7%,24.0% and 16.2% for A,T,G and C respectively, and the frequencies of A and T 山 东 大 学 学 报 (理 学 版)第51卷 - 第3期杜聪聪,等:新疆河狸mtDNA D-loop HV-Ⅰ区的遗传多样性研究 \=-was higher than that of G and C, which indicated the preference of nucleotides; that 10 polymorphic sites(2.03% of total analyzed sites)were found in the mtDNA D-loop HV-Ⅰ sequence of Xinjiang beaver compared with that(AY623632)of Mongolia beaver, of which there were four transitions sites, five transversions sites and one missing site; that Xinjiang beaver and Mongolia beaver were in one cluster by phylogenetic analyses based on the open mtDNA D-loop HV-Ⅰ sequence of beaver in other regions on GenBank, suggesting Xinjiang beaver also belonged to the subspecies of C. f. birulai; that Xinjiang beaver population had two unique haplotypes, whose haplotype diversity(Hd), nucleotide diversity(Pi)and average number of nucleotide differences(K)were 0.233 00±0.015 78, 0.001 23±0.015 90 and 0.700, indicating a low level of genetic diversity, deeply related to its limited environment and human factors.