Genetic diversity and population structure of Kazakh horses (Equus caballus) inferred from mtDNA sequences

Geningguli, M. and Iskhan, K.R. and Li, Y. and Qi, A. and Wunirifu, W. and Ding, L.Y. and Wumaierjiang, A. (2016) Genetic diversity and population structure of Kazakh horses (Equus caballus) inferred from mtDNA sequences. Genetics and Molecular Research. ISSN gmr:15048618

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The Kazakh horse is an important old horse breed in Xinjiang. They have contributed greatly to the breeding and improvement of other local horse breeds, yet their genetic diversity and population structure are not well understood. In the present study, we evaluated the genetic diversity of Kazakh horses and their relationship with other horse breed using the mtDNA D-loop region, Cyt b gene, and a DNA fragment (nps 7974-9963, containing COX3, tRNA-Gly, ND3, and tRNA-Arg), A total of 130 Kazakh horses from 8 populations in China and Kazakhstan were analyzed. A total of 88 haplotypes (haplotype diversity: 0.9885) were identified, in which 3 haplotypes were shared by groups in the two countries. In a median-joining network, 6 haplotypes from different populations. Neighbor-joining analysis revealed similar results in that haplotypes in different populations were admixed in most of the 6 clusters. In conclusion, a high level of genetic diversity was found in the Kazakh horses.However, no clear correspondence between haplogroups and geographic origin and significant differentiation between populations in the two countries were observed. this might have resulted from the ferquent contact between the two countries through the Silk Road in the past, or due to long-term outcrossing and hybridization with the introduced horses. Key words: Kazakh horses; Genetic structure; Population diversity; D-loop; Cyt b

Item Type: Article
Subjects: Agriculture and forestry
Agriculture and forestry
Depositing User: Кайрат Жәлелұлы Исхан
Date Deposited: 25 May 2018 04:58
Last Modified: 25 May 2018 04:58

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