Department of Animal Genetics and Breeding, Lala Lajpat Rai University of Veterinary and Animal Sciences, Hisar, Haryana, India.
Department of Animal Genetics and Breeding, RAJUVAS, Bikaner, Rajasthan, India.
Reprod Domest Anim. 2024 Sep;59(9):e14712. doi: 10.1111/rda.14712.
The objective of the study was to estimate genetic and phenotypic trends for first lactation production and reproduction traits in Murrah buffaloes. The information of pedigree and targeted traits of 640 Murrah buffaloes was collected for the period from 1997 to 2020. The first lactation production traits included first lactation milk yield (FLMY), 305 days first lactation milk yield (305FLMY), first lactation length (FLL), first lactation peak yield (FPY) whereas reproduction traits included first service period (FSP), first calving interval (FCI) and first dry period (FDP). Genetic and phenotypic trends were estimated. Phenotypic trends for FLMY, 305FLMY, FLL and FPY exhibited as 36.96 ± 8.58 kg/year, 31.93 ± 8.34 kg/year, 1.47 ± 0.55 days/year and 0.12 ± 0.02 kg/year, respectively and respective genetic trends exhibited as 3.73 ± 1.67 kg/year, 1.94 ± 0.76 kg/year, -0.15 ± 0.07 days/year and 0.01 ± 0.01 kg/year, respectively. It was revealed that there were significant (p < 0.05) and positive phenotypic trends for all production traits while genetic trends were significant (p < 0.05) for FLMY and 305FLMY traits. The phenotypic trends of studied reproductive traits indicated that only FDP trait significantly (p < 0.01) decreased (1.87 days/year) over time. For FSP and FCI traits, nonsignificant (p > 0.05) genetic and phenotypic trends indicated no change over time. This study highlighted potential challenges in maintaining reproductive efficiency alongside productivity improvements in Murrah buffaloes.
本研究旨在估计摩拉水牛初乳生产和繁殖性状的遗传和表型趋势。收集了 1997 年至 2020 年期间 640 头摩拉水牛的谱系和目标性状信息。初乳生产性状包括初乳产奶量（FLMY）、305 天初乳产奶量（305FLMY）、初乳产奶期（FLL）、初乳产奶高峰产量（FPY），繁殖性状包括首次配种期（FSP）、首次产犊间隔（FCI）和首次干奶期（FDP）。估计了遗传和表型趋势。FLMY、305FLMY、FLL 和 FPY 的表型趋势分别为 36.96±8.58kg/年、31.93±8.34kg/年、1.47±0.55 天/年和 0.12±0.02kg/年，相应的遗传趋势分别为 3.73±1.67kg/年、1.94±0.76kg/年、-0.15±0.07 天/年和 0.01±0.01kg/年。结果表明，所有生产性状均存在显著（p<0.05）和正向表型趋势，而 FLMY 和 305FLMY 性状的遗传趋势也具有显著意义（p<0.05）。研究的繁殖性状的表型趋势表明，只有 FDP 性状随着时间的推移呈显著（p<0.01）下降趋势（1.87 天/年）。对于 FSP 和 FCI 性状，遗传和表型趋势无显著变化（p>0.05），表明随着时间的推移没有变化。本研究强调了在维持摩拉水牛繁殖效率的同时提高生产力所面临的潜在挑战。
