在统一的环境条件下,为牛奶生产提供不同的繁殖价值在荷尔斯坦-弗里西亚牛的产量特征
László Bognár1, Zsolt Jenő Kőrösi1, István Anton2
1National Association of Hungarian Holstein Friesian Breeders, Lőportár u. 16, H-1134 Budapest, Hungary.
Animals : an open access journal from MDPI
|January 11, 2025
概括
基因组繁殖值 (BV基因组) 和传统BLUP繁殖值 (BVBLUP) 在荷尔斯坦-弗里西亚牛群中进行了比较. 在这个大规模的遗传价值评估中,BVBLUP显示出比BVGenomic更高的准确性.
科学领域:
- 动物遗传学动物遗传学
- 量化遗传学 量化遗传学
- 乳制品科学 乳制品科学
背景情况:
- 准确的遗传优点评估对于乳牛繁殖计划至关重要.
- 基因组选择有可能比传统方法提高准确性.
- 对基因组评估与已确定的方法进行验证是必不可少的.
研究的目的:
- 为了比较基因组育种值 (BV基因组) 与传统BLUP育种值 (BVBLUP和BVPedigree) 的准确性.
- 在大量的荷尔斯坦 - 弗里西亚人群中评估不同品种价值估计模型的可靠性.
主要方法:
- 使用EuroGenomics MD v3.0芯片组对1,616,549只荷尔斯坦-弗里西亚雌性进行基因型定型.
- 使用国际/国家参考种群的单步BLUP动物模型估计育种价值.
- 使用 190 头母乳母牛的表型性能数据进行验证.
主要成果:
- BVBLUP显示了最高的准确性 (R2 = 0.370.48).
- 在BV基因组准确度中等 (R2 = 0.090.23).
- 在BVPedigree中,可靠性最低 (R2 = 0.020.06).
结论:
- 在这项研究中,传统的BLUP育种价值估计比基因组评估更准确.
- 可能需要进一步的研究来优化乳牛的基因组评估模型.
- 准确的繁殖值对于有效改善乳牛群至关重要.
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