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Table 1 Overview of purebred ancestors of crossbred populations and the number of generations between the crossbred populations and purebred selection candidates

From: Optimizing genomic reference populations to improve crossbred performance

Crossbred population Purebred ancestors of crossbred animals Generations difference with selection candidates
Generation SUBTOP/TOP
2wayCB_TOP 7 TOP 3
2wayCB 7 SUBTOP 3
2wayCB_1MP 6 SUBTOP 5
4wayCB_TOP 6 TOP 5
4wayCB 6 SUBTOP 5
4wayCB_1MP 5 SUBTOP 7
4wayCB_2MP 4 SUBTOP 9