估计韩国乳牛生殖特征的遗传参数
Jae-Gu Lee1, Jeongwoo Seo2,3, Mahboob Alam1
1Animal Breeding and Genetics Division, National Institute of Animal Science, Rural Development Administration, Cheonan 31000, Korea.
Animal bioscience
|November 1, 2024
概括
韩国乳牛养殖计划需要改善生殖特征,因为遗传和表型趋势在2014年之前一直在下降. 最近的数据显示了改善的趋势,强调了需要更好的数据质量和生殖记录的方法.
科学领域:
- 动物科学动物科学
- 乳牛遗传学 乳牛遗传学
- 生殖生物学 生殖生物学
背景情况:
- 韩国奶牛养殖一直专注于生产和形状,忽视了生殖效率.
- 生殖特征对于乳制品行业的经济可行性至关重要,但在遗传改进方面落后.
- 这项研究解决了为韩国奶牛的关键生殖特征开发育种计划的需要.
研究的目的:
- 为韩国乳牛种群的关键生殖特征制定一个育种计划.
- 分析重要的生殖指标的遗传参数和趋势.
- 为提高乳牛群的生殖效率提供见解.
主要方法:
- 使用了大量数据集 (7,596个农场,超过700万次观测),并进行了严格的质量控制.
- 分析了母牛受精率 (HCR),产卵到第一次受精 (CF),母牛受精率 (CCR),第一次到最后一次受精 (FL) 和开放日 (DO).
- 采用单一特征和多次哺乳动物模型,结合当代群体和环境因素的固定效应.
主要成果:
- 在特征和哺乳期观察到低遗传率估计 (0.007-0.035).
- 生殖能力的遗传和表型趋势下降到大约2014年,最近有所改善.
- 虽然平均可靠性很低,但一些警长表现出高可靠性 (>0.8).
结论:
- 提高生殖效率对于韩国乳制品行业的持续经济可行性至关重要.
- 改善数据质量和对生殖记录的方法调整对于准确的遗传评估至关重要.
- 这项研究为未来的繁殖策略提供了基础,重点是韩国乳牛的生殖表现.
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