实现了跨世代的基因组选择,在树杂交品种的相互循环选择育种计划中实现了基因组选择
Guilherme Ferreira Simiqueli1, Rafael Tassinari Resende2,3, Elizabete Keiko Takahashi4
1Plant Genetics Laboratory, EMBRAPA Genetic Resources and Biotechnology, Brasilia, Brazil.
Frontiers in plant science
|November 15, 2023
概括
基因组选择准确地预测了跨世代的混合树体积增长. 这项研究证明了其在加速育种计划中的有效性,因为它可以通过早期和精确的优质树木选择来加速育种计划.
科学领域:
- 林业科学 林业科学
- 定量遗传学 是一种定量遗传学.
- 植物育种 植物育种
背景情况:
- 森林树的基因组选择 (GS) 通常使用一代内预测,忽视了关键的进化因素.
- 跨代的预测能力对于长期育种计划的效率至关重要.
研究的目的:
- 评估GS的实现预测能力 (RPA) 对跨代混合的体积增长.
- 为了比较不同的GS模型 (GBLUP_G,GBLUP_G+D,HBLUP) 在操作繁殖计划中的有效性.
主要方法:
- 使用G1世代个体的基因组和血统数据进行训练的GS模型 (N=17,462).
- 使用各种模型,在收获年龄预测G2杂交后代的繁殖和基因型值.
- 通过将基因组值与收获时的实际测量值进行比较来验证预测.
主要成果:
- 实现了基因组RPA≥0.80,随着培训和预测世代之间的遗传相关性而增加.
- GBLUP_G+D模型要求RPA≥0.70.0.0的混合或纯种类数据.
- 血统和基因组等级之间的高相关性 (≥0.80);GBLUP_G显示了顶级选择的优越等级巧合.
结论:
- 基因组数据可以准确地对混合树苗进行早期排名,以确保未来的数量增长.
- 一种两阶段的GS方法 (家族选择接下来是个体选择) 优化了选择强度和基因型化成本.
- GS显著加快了杂交白的相互循环选择 (RRS) 育种计划.
关键词:
GBLUPUP GBLUP 的意思是什么意思这就是HBLUPUP.国家统一计划 (SNP) 是一个国家统一计划.树是什么意思 树是什么意思基因组选择 基因组选择增长的增长增长的增长增长的增长.杂交树木的繁殖 杂交树木的繁殖更多相关视频
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