贝叶斯对哈纳利羊生长特征遗传参数的估计
Spandan Shashwat Dash1, Yogesh C Bangar1, Ankit Magotra1
1Department of Animal Genetics and Breeding, Lala Lajpat Rai University of Veterinary and Animal Sciences, Hisar, Haryana, India.
概括
用贝叶斯方法估计了哈纳利绵羊生长的遗传参数. 六个月的体重是一个合适的选择标准,对早期生长而言,母亲的影响很重要.
科学领域:
- 动物遗传学和动物繁殖
- 定量遗传学 是一种定量遗传学.
- 畜牧业生产 畜牧业生产
背景情况:
- 哈纳利羊是一种有价值的土著品种.
- 了解遗传参数对于有效的育种计划至关重要.
- 增长特征显著影响整体群体生产力.
研究的目的:
- 用贝叶斯推理估计哈纳利羊生长特征的遗传参数.
- 确定基因改进的最佳选择标准.
- 评估直接,母性和永久性环境影响对生长的影响.
主要方法:
- 利用了2404只哈纳利动物 (1998-2021) 的血统和生长数据.
- 采用了六种具有直接和母性影响的单变体动物模型 (THRGIBBS1F90,POSTGIBBSF90).
- 根据固定因素进行调整:出生期,性别和母羊的羊毛体重.
主要成果:
- 对于出生体重 (BWT),3个月体重 (WWT),6个月体重 (6WT) 和12个月体重 (YWT) 的直接遗传率估计 (±SE) 分别为0.16±0.04,0.10±0.04,0.18±0.04和0.05±0.03.
- 显著的母亲对BWT (9%) 和WWT (8%) 的影响;母亲对BWT (4%) 和YWT (3%) 的永久环境影响.
- 在特征中观察到高积极的遗传和表型相关性;仅对WWT.有显著的积极遗传变化.
结论:
- 六个月体重 (6WT) 是哈纳利羊的基因改进的一个可行的选择标准.
- 建议将母性影响纳入育种计划,以提高早期生长性能.
- 贝叶斯推理提供了在羊养殖中对遗传参数的可靠估计.
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