Long-term comparison between index selection and optimal independent culling in plant breeding programs with genomic prediction.
Long-term comparison between index selection and optimal independent culling in plant breeding programs with genomic prediction.
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DOI：
10.1371/journal.pone.0235554
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发表时间：
2021
期刊：
影响因子：
3.7
通讯作者：
Hickey JM
中科院分区：
文献类型：
--
作者：
Batista LG;Gaynor RC;Margarido GRA;Byrne T;Amer P;Gorjanc G;Hickey JM
在基因组选择的背景下，我们评估和比较育种计划，使用指数选择或独立剔除父母的轮回选择。我们模拟了20个周期的克隆繁殖作物育种计划，无论是独立淘汰或经济指标与两个不利的相关性状选择。两种策略从杂交到选择亲本的周期时间保持相同。这两种方法导致性状之间的遗传相关性越来越不利，与独立剔除相比，指数选择导致两个性状之间的遗传相关性发生较大变化。当不考虑连锁不平衡时，两种方法的遗传多样性损失相似。两个独立的淘汰方法进行了评估，一个使用最佳淘汰水平，一个使用相同的选择强度的两个性状。最佳淘汰水平优于相同的选择强度，即使性状具有相同的经济重要性。因此，准确地估计最佳剔除水平是必不可少的，以最大限度地提高收益时，独立剔除。一旦达到最佳淘汰水平，独立淘汰和指数选择导致可比的遗传增益。
In the context of genomic selection, we evaluated and compared breeding programs using either index selection or independent culling for recurrent selection of parents. We simulated a clonally propagated crop breeding program for 20 cycles using either independent culling or an economic index with two unfavourably correlated traits under selection. Cycle time from crossing to selection of parents was kept the same for both strategies. Both methods led to increasingly unfavourable genetic correlations between traits and, compared to independent culling, index selection led to larger changes in the genetic correlation between the two traits. When linkage disequilibrium was not considered, the two methods had similar losses of genetic diversity. Two independent culling approaches were evaluated, one using optimal culling levels and one using the same selection intensity for both traits. Optimal culling levels outperformed the same selection intensity even when traits had the same economic importance. Therefore, accurately estimating optimal culling levels is essential for maximizing gains when independent culling is performed. Once optimal culling levels are achieved, independent culling and index selection lead to comparable genetic gains.
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影响因子：
2.3
作者：
Casler, MD;Vogel, KP
通讯作者：
Vogel, KP
影响因子：
4.1
作者：
DUCROCQ, V;COLLEAU, JJ
通讯作者：
COLLEAU, JJ
影响因子：
4.1
作者：
ITOH, Y
通讯作者：
ITOH, Y
影响因子：
6.1
作者：
Rharrabti, Y;Elhani, S;del Moral, LFG
通讯作者：
del Moral, LFG
DOI：
10.1186/1297-9686-45-44
发表时间：
2013-10-30
期刊：
Genetics, selection, evolution : GSE
影响因子：
--
作者：
Clark SA;Kinghorn BP;Hickey JM;van der Werf JH
通讯作者：
van der Werf JH