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Ma Y.N.,Gansu Normal University for Nationalities | Du Y.Y.,Gansu Fishery Research Institute | Zhang Y.P.,Gansu Fishery Research Institute | Wang T.,Gansu Normal University for Nationalities | Wang T.,Gansu Fishery Research Institute
Genetics and Molecular Research | Year: 2016

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 theMinhe (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 FST revealed significant divergence between the populations. The FST 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 during the Quaternary ice age. Our analysis indicated that the management units corresponding to the WY population should be managed and conserved first. In situ conservation is first recommended to protect the original habitat from further destruction. © 2016 The Authors.


Zhang J.,Gansu Agricultural University | Yang Z.,Gansu Fishery Research Institute | Yang Y.,Gansu Agricultural University | Han L.,Gansu Agricultural University | And 3 more authors.
Food Analytical Methods | Year: 2016

Volatile compounds from bone soup of yak (YBS) and yellow cattle (CBS) were investigated by combining gas chromatography and mass spectrometry (GC-MS) fingerprinting with principal component analysis (PCA). A total of 40 and 43 compounds were identified by GC-MS of YBS and CBS, respectively. Nonanal was used as the “reference peak” to calculate the relative retention time and relative peak area of the other compounds in the chromatogram. A total of 16 and 35 common peaks were determined as the characteristic substances of YBS and CBS, respectively. Subsequently, eight and seven unique compounds were selected to evaluate the fingerprints of YBS and CBS, respectively, based on PCA. Our findings confirmed the 8 and 7 substances among the 16 and 35 substances, respectively, as described above. Therefore, the established fingerprinting of volatile compounds for bone soup by combining GC-MS with PCA was a simple and reliable method. This method could provide references for category identification. © 2016 Springer Science+Business Media New York


PubMed | Gansu Fishery Research Institute and Gansu Normal University for Nationalities
Type: Journal Article | Journal: Genetics and molecular research : GMR | Year: 2016

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

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