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Asian Journal of Animal and Veterinary Advances

Year: 2011 | Volume: 6 | Issue: 1 | Page No.: 71-79
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Authors

Yiming Sulaiman

Changxin Wu

Chunjiang Zhao

Keywords

Research Article

Phylogeny of 19 Indigenous Sheep Populations in Northwestern China Inferred from Mitochondrial DNA Control Region

Yiming Sulaiman, Changxin Wu and Chunjiang Zhao
To study genetic information of the local sheep populations of Northwestern China and their phylogenetic positions in relation to other Asian populations and European sheep, the genetic diversity and phylogeny evolution of 223 individuals from 19 indigenous sheep populations in Northwestern China and one Western breed, Texel were analyzed with entire sequences of mitochondria DNA control region. The length of the sequences was considerably variable between 1103 and 1256 bp. Phylogenetic analysis indicated that 3 mtDNA lineages A, B and C were found in all sampled populations, except for the absence of lineage C in two populations. Phylogenetic tree and median joining network were constructed with the sequenced mtDNA control region and both the phylogenetic tree and network demonstrated that there were three independent clusters and some sequences deviated from cluster A and C. Neighbor-joining tree constructed based on genetic distances showed a multi-maternal originality of the nineteen Xinjiang local sheep populations, which were clustered with the sheep groups in other parts of China, Central Asia, Turkey and India. The high genetic diversity of Xinjiang local sheep populations suggests that they may have distinct maternal origins and more complicated phylogenetic history than the other Chinese sheep breeds.
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