Population genetic structure and its implication in the conservation of Schizopygopsis pylzovi in Yellow River as inferred from mitochondrial DNA sequence analysis

作者：Yuying Ma, Yanzhen Du, Yan Zhang, T. Wang · 发表于：Genetics and Molecular Research · 年份：2016 · DOI：10.4238/gmr.15038480 · 被引用次数：2 · 研究领域：Genetic diversity and population structure、Isotope Analysis in Ecology、Genomics and Phylogenetic Studies

To assess the genetic diversity, structure, and population dynamics of Schizopygopsis pylzovi, we examined the changes in mitochondrial DNA sequences (the mtDNA control region and the Cyt b gene; 1835 bp) in 304 individuals from nine populations.The samples were segregated into 112 haplotypes, with high haplotype diversity and low nucleotide diversity.The haplotype diversity was highest in the Minhe (HS) range of Huangshui River and lowest in the Weiyuan (WY) range of Weihe River.Analysis of molecular variance showed that 69.64% of the total genetic variance was contributed by within-the-group variation and 30.36% was contributed by among-the-group variation.Pairwise F ST revealed significant divergence between the populations.The F ST Genetics and Molecular Research 15 (3): gmr.15038480 between the MT and WY was highest, and that between the YZ and YJ was lowest.The neighbor-joining phylogenetic tree demonstrated that all geographic populations were not monophyletic, but overlapped each other, indicating that the duration of geographical isolation was not long enough or the populations had not yet reached significant genetic isolation or differentiation at the monophyletic level.Tajima's D and Fu's Fs were negative and statistically significant, indicating that S. pylzovi had experienced certain population expansion events, which is consistent with the hypothesis that the headwater area of the Yellow River was dramatically affected by the geological and climatic upheaval dur...