PDF(Pubmed)
Abstract：
Reproductive traits in dairy cattle are crucial for herd productivity and profitability. This study investigates the influence of relatedness to high immune response (HIR) Immunity+ sires on reproductive performance indicators in Polish Holstein-Friesian cows. A total of 5094 cows were analyzed, categorized based on their relatedness to HIR Immunity+ sires, and assessed for various reproductive parameters, including age at first insemination, gestation length, days open, calving interval, and calving ease. The results showed that the level of relatedness to HIR Immunity+ sires influenced certain reproductive traits, such as service period, gestation length, and age at first and second calving. Additionally, cows related to HIR Immunity+ sires exhibited a higher frequency of twin pregnancies and more complicated births. While some benefits were observed in certain reproductive traits among cows related to HIR Immunity+ sires, such as reduced age at first insemination and shortened gestation length, the overall impact on reproductive efficiency remains inconclusive. Further studies are needed to fully elucidate the effects of using semen from HIR Immunity+ sires on reproductive performance in dairy cattle.
摘要：
奶牛的繁殖性状对牛群生产力和盈利能力至关重要。这项研究调查了高免疫反应（HIR）免疫父系对波兰荷斯坦-弗里斯奶牛繁殖性能指标的影响。总共分析了5094头奶牛，根据他们与HIR免疫+父系的亲缘关系进行分类，并评估了各种生殖参数，包括第一次授精的年龄，妊娠长度，天开放,产卵间隔,和产卵的轻松。结果表明，与HIR免疫+父系的亲缘关系水平影响了某些生殖性状，如服务期，妊娠长度，以及第一次和第二次产牛的年龄。此外,与HIR免疫+父系相关的母牛表现出更高的双胎妊娠频率和更复杂的分娩。虽然在与HIR免疫+父系相关的母牛的某些繁殖性状中观察到一些益处，如第一次授精时年龄减少和妊娠长度缩短，对生殖效率的总体影响仍不确定。需要进一步的研究来充分阐明使用HIRImmunity父系的精液对奶牛繁殖性能的影响。
