在昆虫繁殖中对表型,血统和基于家族的选择进行比较评估,使用随机模拟
L S Hansen1, A C Bouwman2, G Sahana3
1Center for Quantitative Genetics and Genomics, Aarhus University, C.F.Møllers Allé 3, 8000 Aarhus, Denmark; Department of Biology, Aarhus University, Ny Munkegade 114, 8000 Aarhus, Denmark.
Animal : an international journal of animal bioscience
|March 21, 2025
概括
个体繁殖价值选择最大限度地提高了昆虫的遗传收益,超过了表型选择,特别是在低遗传性的情况下. 现型选择提供较低的近亲繁殖,但需要控制更高的遗传性.
科学领域:
- 动物育种与遗传学
- 量化遗传学 量化遗传学
- 昆虫种群管理 昆虫种群管理
背景情况:
- 昆虫的选择性繁殖传统上使用表型选择,忽视遗传关系.
- 在昆虫种群中,用于个体选择的血统追踪具有挑战性.
- 家庭选择提供了一个替代方案,使用联合或严格的跨家庭方法.
研究的目的:
- 通过随机模拟来比较四种昆虫选择方案的遗传收益和近亲繁殖率.
- 根据不同的遗传和人口结构来评估选择策略.
- 评估常见环境影响对选择有效性的影响.
主要方法:
- 在四种选择方案下对昆虫种群的随机模拟:表型,个体血统,组合和家族间选择.
- 在五个遗传级别 (0.05-0.6),两个家族数量 (60或200) 和两个兄弟组结构 (1或3) 中进行了比较.
- 对遗传收益和内生繁殖率的分析,考虑到固定的共同环境效应.
主要成果:
- 个体繁殖价值选择的遗传收益明显高于低遗传性 (≤0.1) 的表型选择.
- 现型选择在低遗传性时显示出较低的近亲繁殖率,但随着遗传性的增加,这种优势减少了.
- 家庭间的选择减少了遗传收益,但多个兄弟姐妹群体和增加的家庭数量 (200对60) 减轻了内生繁殖.
结论:
- 根据个体繁殖值进行选择是最大限度地提高昆虫的遗传收益的优势.
- 当个别血统不切实际时,家族间选择是一种可行的替代方案.
- 现型选择提供高收益和低亲生繁殖在低遗传性,但需要更高水平的亲生繁殖控制.
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