评估线性编程和最佳贡献选择方法,用于肉牛繁殖的长期选择
Xu Zheng1, Tianzhen Wang1, Qunhao Niu1
1State Key Laboratory of Animal Biotech Breeding, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing 100193, China.
线性编程 (LP) 和最佳贡献选择 (OCS) 策略改善了肉牛的遗传收益. OCS有效地控制了近亲繁殖,使其成为可持续的长期遗传改进的理想选择.
科学领域:
- 动物育种与遗传学
- 量化遗传学 量化遗传学
- 基因组选择 基因组选择
背景情况:
- 基因组选择显著提高了牲畜的遗传收益.
- 长期养殖肉牛的最佳选择方法需要进一步研究.
研究的目的:
- 为了比较线性编程 (LP) 和最佳贡献选择 (OCS) 策略在肉牛繁殖中的有效性.
- 评估它们对15代人遗传收益和近亲繁殖水平的影响.
主要方法:
- 模拟了超过15代的肉牛种群.
- 实施LP和OCS育种策略,以截断选择 (TS-I,TS-II) 作为控制.
- 监测遗传收益,平均亲属关系,QTL变异和异构性.
主要成果:
- LP显著增加了遗传收益,特别是在高遗传性特征方面,但增加了近亲繁殖.
- 与TS-II相比,OCS的遗传收益较低,但有效地管理了近亲繁殖.
- LP和OCS都改善了遗传收益,OCS提供了可持续的长期收益.
结论:
- LP和OCS有效地提高了肉牛的遗传收益.
- 在可持续的遗传改进中,由于优越的同胞繁殖控制,OCS更可取.
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