title: [Genetic diversity analysis of mitochondrial D-loop region of Chinese sucker (Myxocyprinus asiaticus)].
abstract: Chinese sucker, Myxocyprinus asiaticus, is an endemic species of China and also the only representatives of family Catostomidae in Asia. The fish was naturally distributed in Yangtze River and Mingjiang River and now few could be captured because of pollution and overexploitation. The fish has been listed in the second class of preserved animal in China. Studying and assessing its population structure is an imperative and fundamental work for making effective protection strategies. We amplified and sequenced the D-loop region of mtDNA of 8 samples. The size of the D-loop region is about 958 bp. A total of 32 variation loci were detected and the mutation rate was 0.033. All the mutation came from nucleotide substitution except one nucleotide deletion. Most of the nucleotide variations were found between the 55-365 bp region. The individual mutation rate varied from 0-1.36%, which exhibited nucleotide polymorphism to some extent among 8 samples. Compared with RAPD and other PCR-based methods, the directily sequencing of mtDNA D-loop region revealed much more genetic diversity. Meanwhile, the D-loop region of Moxostoma robustum derived from GenBank was aligned with that of Chinese sucker through CLUSTAL software. By comparison, we found that the mutation rate (0.033) of D-loop of Chinese sucker is higher than that of Moxostoma robustum (0.016).
authors.affiliation: College of Life Sciences, Wuhan University, Wuhan 430072, China.
authors.forename: Yu-Hua
authors.initials: YH
authors.lastname: Sun
authors.forename: Wei
authors.initials: W
authors.lastname: Wang
authors.forename: Si-Yang
authors.initials: SY
authors.lastname: Liu
authors.forename: Shun-Ping
authors.initials: SP
authors.lastname: He
authors.forename: Xue-Ling
authors.initials: XL
authors.lastname: Shao
authors.forename: Zhi-Xiong
authors.initials: ZX
authors.lastname: Xie
authors.forename: Feng-Jiao
authors.initials: FJ
authors.lastname: Deng
authors.forename: Yong
authors.initials: Y
authors.lastname: Liu
authors.forename: Jin-Gou
authors.initials: JG
authors.lastname: Tong
authors.forename: Qing-Jiang
authors.initials: QJ
authors.lastname: Wu
mesh_terms: D000818:Animals; D001483:Base Sequence; D003531:Cypriniformes / Q000235:genetics*; D004272:DNA, Mitochondrial / Q000737:chemistry / Q000235:genetics*; D014644:Genetic Variation; D008969:Molecular Sequence Data; D009154:Mutation; D011110:Polymorphism, Genetic; D017422:Sequence Analysis, DNA; D012689:Sequence Homology, Nucleic Acid
chemical_list: D004272:DNA, Mitochondrial