牛乳生产的变异和遗传参数的异质性,使用贝叶斯推理
Raimundo Nonato Colares Camargo Júnior1, Luane da Silva Fernandes2, João Cláudio do Carmo Panetto3
1Postgraduate Program in Animal Science (PPGCAN), Institute of Veterinary Medicine, Federal University of Para (UFPA), UFRA, Brazilian Agricultural Research Corporation (EMBRAPA), Castanhal, PA, Brazil.
PloS one
|July 12, 2023
概括
变异异质 (HV) 对305天的牛奶产量 (L305) 和吉罗兰多,吉尔和霍尔斯坦牛的 sire 遗传评估的影响很小. 低差异类和高差异类之间的遗传相关性仍然很高,这表明了强大的育种价值预测.
科学领域:
- 动物育种与遗传学
- 乳制品科学 乳制品科学
- 统计遗传学 统计遗传学
背景情况:
- 变异的异质性 (HV) 可以影响牲畜种群的遗传评估.
- 了解HV的影响对于准确预测乳牛的繁殖价值至关重要.
研究的目的:
- 评估异质差异 (HV) 对吉罗兰多,吉尔和霍尔斯坦牛305天牛奶产量 (L305) 的影响.
- 为了评估HV对巴西子及其后代的遗传评估的影响.
主要方法:
- 忽视HV的单特征动物模型与考虑L305.5的低标准偏差 (SD) 和高标准偏差 (SD) 类的两种特征模型进行了比较.
- 通过吉布斯采样的贝叶斯推断被用来估计 (共) 差组件和繁殖值.
- 对不同品种的SD类之间的遗传性和遗传相关性进行了分析.
主要成果:
- 遗传性估计在各种品种和SD类之间有所不同,在Gir和Holstein的高SD类中更高.
- 在所有品种的低SD类和高SD类之间观察到高遗传相关性 (≥0.79) 和等级相关性 (Spearman,≥0.92).
- 发现HV对L305的影响很小.
结论:
- 变异的异质性对研究品种的305天牛奶产量有有限的影响.
- 子的遗传评估不会受到异质差异存在的显著影响.
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