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活体和死体动物的基因定型,以提高养殖计划中的猪的断奶后生存率

Md Sharif-Islam¹, Julius H J van der Werf², Mark Henryon³

¹AGBU, a joint venture of NSW Department of Primary Industries and University of New England, Armidale, NSW, 2351, Australia. mislam40@myune.edu.au.

Genetics, selection, evolution : GSE

|September 18, 2024

概括

活猪和死猪 (GSD) 的基因定型与仅活猪 (GOS) 的基因定型相比,显著增加了断奶后生存 (PWS) 的遗传收益. 包括已死亡动物的基因组数据可以提高育种价值预测的准确性,从而改善PWS.

科学领域:

动物遗传学动物遗传学
量化遗传学量化遗传学
畜牧养殖畜牧养殖畜牧养殖

背景情况:

评估基因定型策略对养猪中的遗传收益的影响.
将活体和死体动物 (GSD) 的基因型鉴定与仅活体动物 (GOS) 的基因型鉴定进行比较.

研究的目的:

为了确定GSD是否比GOS.在猪中对断奶后生存 (PWS) 产生更大的遗传收益.
评估GSD对PWS估计繁殖值 (EBV) 的准确性的影响.

主要方法:

随机模拟以估计不同PWS和 litter大小的0.01亲生繁殖率的遗传收益.
使用基于血统的选择作为参考,EBVs来自线性或值模型.
将GSD和GOS策略进行比较,其中使用了所有动物的表型,但基因型比例有所不同.

主要成果:

在所有模拟繁殖方案中,GSD比GOS获得了14-33%的遗传增益.
与GOS相比,GSD至少14%提高了PWS的EBV预测准确度.
模型类型 (线性与值) 和基因型策略没有显著影响EBV偏差.

结论:

无论是死动物还是活动物的基因定型对于预测PWS的EBV更有信息性.
结合来自20%以上的死亡动物的基因组数据可以对PWS遗传改进有好处.
当基因型死亡动物的比例≥60%时,GSD在遗传收益中提供了边际增加.

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