影响单个牛群第 30 至 70 天妊娠损失的因素:对父系、母牛和其他诱因的综合分析

IF 2.4 2区 农林科学 Q3 REPRODUCTIVE BIOLOGY
Hany Abdalla , Adel Elghafghuf , Mohamed A. Hussein , Ibrahim Elsohaby
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引用次数: 0

摘要

这项回顾性研究采用混合效应逻辑模型分析法,在一个牛群10年来的9507次妊娠数据集中,研究与第30天至第70天之间妊娠损失(PL)概率相关的变量。该模型纳入了固定效应变量,包括奶牛品种(荷斯坦、杂交和褐瑞士)、胎次(1胎、2胎、3胎和4胎或4胎以上)、人工授精季节、人工授精次数(≤3 vs >;3)、发情性质(自发与同步)、产后问题、父系品种(荷斯坦、弗莱克维赫、棕瑞士和蒙贝利亚德)、子代基因型(纯种与杂交)、授精时的产奶天数(DIM)、305 天实际产奶量和父系受胎率。此外,随机效应还包括父系(n = 129)、奶牛(n = 3463)和生产年份(n = 10)。研究结果表明,使用瑞士褐系父本或初始受胎率较低的父本进行人工授精的奶牛的PL率较高。双胎奶牛、305 天产奶量较低的奶牛、DIM 后期受精的奶牛、第 4 次或以后受精的奶牛以及冬季或秋季受精的奶牛的 PL 率较低。发情类型和子代基因型对PL没有显著影响。奶牛、父系和生产年份的随机效应分别为 0.230、0.054 和 0.112。总之,研究结果表明,改进对高产奶牛、泌乳早期奶牛和热应激奶牛的管理方法,同时利用褐瑞士奶牛和每次授精初始受胎率高的父本,有可能降低牧场的总体PL率。不过,研究结果并不支持使用杂交奶牛、不同品种的种公牛或特定种公牛来降低牧场的PL率。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Factors influencing pregnancy loss between days 30 and 70 in a single cattle herd: A comprehensive analysis of sire, cow, and other contributing factors

This retrospective study utilized a mixed-effects logistic model analysis to investigate variables associated with the probability of pregnancy loss (PL) between days 30 and 70 in a dataset comprising 9507 pregnancies from a single cattle herd over 10 years. The model incorporated fixed-effect variables including cow breed (Holstein, Crossbred, and Brown Swiss), parity (1st, 2nd, 3rd, and 4th or more), insemination seasons, insemination number (≤3 vs >3), estrus nature (spontaneous vs synchronized), postpartum problems, sire breed (Holstein, Fleckvieh, Brown Swiss, and Montbéliarde), zygote genotypic (pure vs crossbred), days in milk (DIM) at insemination, actual 305-day milk yield, and sire conception rate. Additionally, random effects included sire (n = 129), cow (n = 3463), and production years (n = 10). The results revealed that cows inseminated with Brown Swiss sires or sires with lower initial conception rates had higher PL rates. Biparous cows, cows with lower 305-day milk yield, cows inseminated later in DIM, cows receiving the 4th or subsequent insemination, and cows inseminated during winter or autumn had lower PL rates. The estrus type and zygote genotype did not significantly impact PL. The random effects of cow, sire, and production years were estimated at 0.230, 0.054, and 0.112, respectively. In conclusion, the study findings suggested that improving management practices for high-yielding cows, cows in early lactation stages, and cows exposed to thermal stress conditions, along with utilizing Brown Swiss cows and sires with high initial conception rates per insemination, could potentially decrease overall PL rates on the farm. Nonetheless, the results did not support the use of Crossbred cows, sires from different breeds, or specific sires to mitigate PL rates on the farm.

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来源期刊
Theriogenology
Theriogenology 农林科学-生殖生物学
CiteScore
5.50
自引率
14.30%
发文量
387
审稿时长
72 days
期刊介绍: Theriogenology provides an international forum for researchers, clinicians, and industry professionals in animal reproductive biology. This acclaimed journal publishes articles on a wide range of topics in reproductive and developmental biology, of domestic mammal, avian, and aquatic species as well as wild species which are the object of veterinary care in research or conservation programs.
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