Analysis on the effectiveness of promoting sex-sorted frozen semen technology in Xinjiang brown cattle in Yili Prefecture
Guo Xiaoping
Tulailijiang Hamutai
Sairek Asen
Kuerbanni Kuermaxi
Rxidan Abulizi
Reshalati Tuohutayoufu
Wang Chuanjun
Tuerxunjiang Wumueraili
Abstract：This study evaluated the application effectiveness of sex-sorted frozen semen in Xinjiang brown cattle breeding programs across four farms(households/cooperatives)in Yili Prefecture.A total of 1 164 healthy cows meeting strict reproductive health criteria(normal follicular development,estrous cycles,no history of reproductive disorders)were artificially inseminated with sex-sorted semen,while 1 550 cows served as controls using conventional semen.Key findings revealed that sex-sorted semen achieved a 49.48％conception rate(vs.60.39％in controls),94.27％calving rate(vs.95.30％),and a significantly higher female calf rate(92.08％vs.51.35％).Farm-specific analysis identified Farm A with the highest conception(52.17％)and calving rates(96.17％),while Cooperative C yielded the highest female calf rate(94.12％).Age-related efficacy showed two-year-old cows achieving a 57.14％conception rate,outperforming older cohorts.The study concludes that sex-sorted semen effectively enhances female calf production,with prioritized application in 2 to 3-year-old cows.Critical success factors include refined herd management,technician skill optimization,and precise breeding timing.These findings provide actionable insights for improving Xinjiang brown cattle breeding efficiency and genetic resource conservation.
Keywords：Xinjiang brown cattleSex-sorted frozen semenConception rateCalving rate
Publication Date：2025-02-14
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 64-67 )