在Rubia Galega牛肉牛品种的生产性特征上的亲生关系抑郁的基因组分析
N Mejuto-Vázquez1,2, C Hervás-Rivero3, R Rodríguez-Bermúdez1
1Departamento de Anatomía, Produción Animal e Ciencias Clínicas Veterinarias, Facultade de Veterinaria, Universidade de Santiago de Compostela, Lugo, Spain.
概括
对Rubia Galega牛的基因组分析揭示了严重的近亲繁殖抑郁,影响了生殖特征,如第一次分娩和分娩间隔的年龄. 同胞性运行 (ROH) 确定了关键的基因组区域和基因,如MSTN,与这些生产特征相关.
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:
- 具有较小种群的本土畜牧品种面临着因亲属之间频繁交配而导致的亲属繁殖抑郁症.
- 西班牙加利西亚的Rubia Galega品种是需要遗传健康评估的这种品种的一个例子.
研究的目的:
- 使用SNP数据估计Rubia Galega牛的基因组内生系数.
- 评估近亲繁殖对关键生产和生殖特征的影响:第一次分娩时的年龄 (AFC),分娩间隔 (CI),出生体重 (BW) 和210天的体重 (W210).
- 为了确定与近亲繁殖抑郁症相关的基因组区域和候选基因.
主要方法:
- 基因组杂交系数是使用~63,000个SNP和不同长度的同胞性 (ROH) 运行来计算的.
- 基因组最佳线性无偏预测 (GBLUP) 用于评估近亲繁殖对表型特征的影响.
- 用t测试将ROH中的SNP与表型特征联系起来,然后进行基因注释.
主要成果:
- 在AFC和CI方面观察到显著的亲生繁殖抑郁.
- 虽然BW和W210显示出近亲繁殖的趋势,但这些影响在统计学上并不显著.
- 最近的近亲繁殖 (ROH>8 Mb) 对生殖特征产生了负面影响.
- 染色体2上的关键基因组区域,包括MSTN,NAB1和COL5A2等基因,与增加的AFC和减少的BW和W210.0相关.
结论:
- 基于ROH的近亲繁殖估计对于检测本地牛品种的近亲繁殖抑郁是有效的.
- 特定的基因组区域和候选基因,特别是MSTN,在近亲繁殖抑郁症中发挥作用,并影响Rubia Galega牛的生产特征.
- 了解这些遗传因素对于小型种群的保护和繁殖策略至关重要.
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