Acta Veterinaria et Zootechnica Sinica ›› 2025, Vol. 56 ›› Issue (5): 2194-2202.doi: 10.11843/j.issn.0366-6964.2025.05.019

• Animal Genetics and Breeding • Previous Articles     Next Articles

Genetic Diversity of Mitochondrial Genome and Maternal Origin of 10 Cattle Populations in Tibet Autonomous Region

YAO Tingting1(), LI Hao1, YAN Huixuan1, CAO Yifan1, Cirengluobu 2, Suolangquji 2, Nimacangjue 2, ZHAO Li2, Danzengluosang 2, Silangwangmu 2, Basangzhuzha 2,*(), CHEN Ningbo1,*()   

  1. 1. College of Animal Science and Technology, Northwest A & F University, Yangling 712100, China
    2. Institute of Animal Husbandry and Veterinary Medicine, Tibet Academy of Agricultural Sciences, Lhasa 850000, China
  • Received:2024-11-20 Online:2025-05-23 Published:2025-05-27
  • Contact: Basangzhuzha , CHEN Ningbo E-mail:Yao_ting_ting@126.com;157493385@qq.com;ningbochen@nwafu.edu.cn

Abstract:

This study aimed to explore the genetic diversity of the mitochondrial genome and maternal origin of cattle in Tibet Autonomous Region. In this study, the genetic diversity and their maternal origin of 167 individuals from 10 populations in Tibet Autonomous Region were analyzed by comparing mitochondrial genome. Through phylogenetic and genetic diversity analysis, 120 haplotypes from 167 individuals were detected including the T2, T3 and T4 haplotypes of taurine cattle; the Q haplotype of Bos primigenius; the I1 and I2 haplotypes of indicine cattle; and the haplotype of yak. The T3 haplotype also included T3119 and T3055, two subhaplotypes specific to East Asian taurine cattle. The results of genetic diversity analysis revealed that the haplotype diversity of Basang cattle was the highest (0.990±0.028), while the lowest was Bailang cattle (0.867±0.107), the highest nucleotide diversity was Jilong cattle (0.030±0.000 5), and the lowest was Shigatse cattle (0.001±0.000 2). The phylogenetic tree and haplotype network diagram revealed that the 10 cattle groups were mainly of taurine origin, and a small number of yak and indicine origin. Overall, the 10 cattle populations all presented high genetic diversity, with the maternal origins of taurine cattle, indicine cattle and yak, indicating that the maternal genetic diversity of cattle was high and that there was genetic exchange with yak. These results are important for understanding the genetic evolution, protection and utilization of valuable genetic resource of cattle in Tibet Autonomous Region

Key words: Tibet Autonomous Region, cattle, mtDNA genome, genetic diversity

CLC Number: