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整个基因组与美国牧场绵羊的长寿和生殖特征的关联

Jamin A Smitchger¹, J Bret Taylor², Michelle R Mousel³

¹Department of Animal, Veterinary and Food Sciences, University of Idaho, Moscow, ID, United States.

Frontiers in genetics

|June 11, 2024

概括

通过遗传选择提高羊母羊的寿命对绵羊产业至关重要. 这项研究确定了与绵羊的寿命和生殖特征相关的显著遗传标记,为基因组选择策略铺平了道路.

科学领域:

动物遗传学动物遗传学
量化遗传学量化遗传学
羊的繁殖羊的繁殖

背景情况:

绵羊的长寿是绵羊生产的关键经济特征,受死亡损失和屠宰的影响.
改善寿命需要选择生殖成功,但记录一生的特征是具有挑战性的.
基因组选择提供了一种潜在的策略,通过早期识别优秀的替代母羊来提高母羊的稳定性.

研究的目的:

识别与绵羊长寿,生殖表现和生产特征相关的遗传标记.
探索基因组选择的潜力,以改善绵羊品种的绵羊长寿.
为未来的研究确定影响长寿和生殖成功的特定基因.

主要方法:

一项全基因组关联研究 (GWAS) 在Rambouillet,Polypay,Suffolk和哥伦比亚品种的1,130只母羊中进行.
分析涉及503,617个单核酸多态 (SNP),使用贝叶斯信息和链接不平衡代嵌套关键路 (BLINK) 模型.
分析的特征包括长寿,平价和终身羔羊产量 (出生人数,活着,断奶人数和断奶人数).

主要成果:

跨品种GWAS确定了25个显著SNP,在品种内部分析中发现了19个额外的显著SNP.
最重要的SNP (rs429525276) 与兰布尤耶羊的长寿和平价相关 (p值<6.4E-15).
显著的SNP位于与生殖,牙和免疫功能相关的基因附近,包括ALPL,ANOS1和ITGB6.

结论:

已经确定了多个SNP作为将其纳入选择指数的候选者,以提高羊的寿命.
这项研究突出了某些基因,需要进一步研究它们在母羊生殖和生产特征中的作用.
可以开发基因组工具,以促进早期选择替代母羊,以提高寿命和生产力.

关键词:

在GWAS中,GWAS就是GWAS.生来的一生羔羊出生.终身的羔羊断奶的羊羔 litter litter 的尺寸 litter 的尺寸过早杀的原因是什么?生产性生活生产性生活羊群羊群羊群的羊群是什么意思断奶时的体重断奶时的体重

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