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Genetic diversity of Chinese cattle revealed by Y-SNP and Y-STR markers.

Animal Genetics 2019 Februrary
With its vast territory and complex natural environment, China boasts rich cattle genetic resources. To gain the further insight into the genetic diversity and paternal origins of Chinese cattle, we analyzed the polymorphism of Y-SNPs (UTY19 and ZFY10) and Y-STRs (INRA189 and BM861) in 34 Chinese cattle breeds/populations, including 606 males representative of 24 cattle breeds/populations collected in this study as well as previously published data for 302 bulls. Combined genotypic data identified 14 Y-chromosome haplotypes that represented three haplogroups. Y2-104-158 and Y2-102-158 were the most common taurine haplotypes detected mainly in northern and central China, whereas the indicine haplotype Y3-88-156 predominates in southern China. Haplotypes Y2-108-158, Y2-110-158, Y2-112-158 and Y3-92-156 were private to Chinese cattle. The population structure revealed by multidimensional scaling analysis differentiated Tibetan cattle from the other three groups of cattle. Analysis of molecular variance showed that the majority of the genetic variation was explained by the genetic differences among groups. Overall, our study indicates that Chinese cattle retain high paternal diversity (H = 0.607 ± 0.016) and probably much of the original lineages that derived from the domestication center in the Near East without strong admixture from commercial cattle carrying Y1 haplotypes.

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