Xu S Z, Muir W M
Department of Animal Sciences, Purdue University, West Lafayette, Indiana 47907.
Genetics. 1991 Nov;129(3):963-74. doi: 10.1093/genetics/129.3.963.
An exact transformed culling method for any number of traits or stages of selection with explicit solution for multistage selection is described in this paper. This procedure does not need numerical integration and is suitable for obtaining either desired genetic gains for a variable proportion selected or optimum aggregate breeding value for a fixed total proportion selected. The procedure has similar properties to multistage selection index and, as such, genetic gains from use of the procedure may exceed ordinary independent culling level selection. The relative efficiencies of transformed to conventional independent culling ranged from 87% to over 300%. These results suggest that for most situations one can chose a multistage selection scheme, either conventional or transformed culling, which will have an efficiency close to that of selection index. After considering cost savings associated with multistage selection, there are many situations in which economic returns from use of independent culling, either conventional or transformed, will exceed that of selection index.
本文描述了一种适用于任意数量性状或选择阶段的精确变换淘汰方法，该方法针对多阶段选择给出了显式解。此程序无需数值积分，适用于为选定的可变比例获得期望的遗传进展，或为选定的固定总比例获得最优综合育种值。该程序具有与多阶段选择指数相似的性质，因此，使用该程序获得的遗传进展可能超过普通独立淘汰水平选择。变换淘汰相对于传统独立淘汰的相对效率在87%至300%以上。这些结果表明，在大多数情况下，可以选择一种多阶段选择方案，无论是传统淘汰还是变换淘汰，其效率都将接近选择指数。在考虑与多阶段选择相关的成本节约后，在许多情况下，使用传统或变换的独立淘汰所带来的经济回报将超过选择指数。
