Characterization of cytochrome b diversity in Chinese domestic horses

Authors

  • X. P. Yue,

    1. Shaanxi Key Laboratory of Molecular Biology for Agriculture, College of Animal Science and Technology, Northwest A & F University, Yangling, Shaanxi 712100, China.
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    • The two authors contributed equally to this article.

  • F. Qin,

    1. Shaanxi Key Laboratory of Molecular Biology for Agriculture, College of Animal Science and Technology, Northwest A & F University, Yangling, Shaanxi 712100, China.
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    • The two authors contributed equally to this article.

  • M. G. Campana,

    1. McDonald Institute for Archaeological Research, University of Cambridge, Cambridge, CB2 1RD, UK
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  • D. H. Liu,

    1. Shaanxi Key Laboratory of Molecular Biology for Agriculture, College of Animal Science and Technology, Northwest A & F University, Yangling, Shaanxi 712100, China.
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  • C. C. Mao,

    1. Shaanxi Key Laboratory of Molecular Biology for Agriculture, College of Animal Science and Technology, Northwest A & F University, Yangling, Shaanxi 712100, China.
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  • X. B. Wang,

    1. Shaanxi Key Laboratory of Molecular Biology for Agriculture, College of Animal Science and Technology, Northwest A & F University, Yangling, Shaanxi 712100, China.
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  • X. Y. Lan,

    1. Shaanxi Key Laboratory of Molecular Biology for Agriculture, College of Animal Science and Technology, Northwest A & F University, Yangling, Shaanxi 712100, China.
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  • H. Chen,

    1. Shaanxi Key Laboratory of Molecular Biology for Agriculture, College of Animal Science and Technology, Northwest A & F University, Yangling, Shaanxi 712100, China.
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  • C. Z. Lei

    1. Shaanxi Key Laboratory of Molecular Biology for Agriculture, College of Animal Science and Technology, Northwest A & F University, Yangling, Shaanxi 712100, China.
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C. Z. Lei, College of Animal Science and Technology, Northwest A & F University, Yangling, Shaanxi 712100, China.
E-mail: leichuzhao1118@126.com

Summary

Previous mitochondrial DNA (mtDNA) D-loop and microsatellite studies have shown that Chinese horses have multiple maternal origins and high genetic diversity. To better characterize maternal genetic origins and diversity of Chinese domestic horses, we conducted a comprehensive analysis of 407 complete 1140 bp sequences of the horse mitochondrially encoded cytochrome b (CYTB) gene, including 323 horses from 13 Chinese indigenous breeds and 84 reference sequences from GenBank. A total of 114 haplotypes were identified, of which 73 appeared among the 13 Chinese horse breeds. The high mitochondrially encoded cytochrome b haplotypic diversity suggests multiple maternal origins in Chinese horses.

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