Paternal Lineage and Genetic Diversity of Jiuzhi Yaks Revealed by Y-Chromosome SRY Sequencing.

ABSTRACT: Yak husbandry on the Qinghai-Tibetan Plateau relies on genetically resilient sire lines, yet the paternal ancestry of the locally prominent Jiuzhi breed has never been quantified. To resolve this gap, a 690 bp fragment of the Y chromosomal SRY gene was sequenced in 117 males spanning Jiuzhi (n = 12) and five neighboring Qinghai breeds and compared with three single individual public records that represent Qinghai Plateau, Tianzhu White, and Wild yaks. Alignment, haplotype calling, diversity indices, F_ST differentiation, AMOVA, multidimensional scaling, and TCS network analysis were performed. Thirty-two haplotypes were recovered; Jiuzhi yaks possessed twelve, and six of them had private alleles. Mean A + T content was 53.8%. Haplotype diversity was highest in Qinghai Plateau, Tianzhu Whit

SUBMITTER: Yang B 

PROVIDER: S-EPMC12523302 | biostudies-literature | 2025 Sep

REPOSITORIES: biostudies-literature