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Table 2 Regression coefficients of true breeding values on genomic estimated breeding values of purebred selection candidates for crossbred performance for different reference populations

From: Optimizing genomic reference populations to improve crossbred performance

Scenario Reference population size
9600 4800 2400 1200 600 300
Purebred-crossbred correlation is 0.75    
 Purebred 0.65 0.59 0.53 0.42 0.36 0.29
 2wayCB_TOP 0.90 0.86 0.81 0.75 0.71 0.65
 2wayCB 0.89 0.84 0.79 0.75 0.69 0.67
 2wayCB_1MP 0.87 0.84 0.76 0.72 0.69 0.65
 4wayCB_TOP 0.79 0.82 0.75 0.71 0.68 0.75
 4wayCB 0.78 0.79 0.73 0.70 0.73 0.59
 4wayCB_1MP 0.76 0.74 0.70 0.70 0.71 0.70
 4wayCB_2MP 0.74 0.73 0.75 0.77 0.70 0.69
Purebred-crossbred correlation is 0.5    
 Purebred 0.42 0.38 0.34 0.26 0.23 0.19
 2wayCB_TOP 0.94 0.94 0.92 0.94 0.90 0.87
 2wayCB 0.94 0.94 0.91 0.90 0.90 0.81
 2wayCB_1MP 0.96 0.91 0.90 0.87 0.87 0.83
 4wayCB_TOP 0.89 0.85 0.89 0.90 0.87 0.98
 4wayCB 0.88 0.86 0.86 0.86 0.87 0.85
 4wayCB_1MP 0.89 0.91 0.87 0.91 0.96 0.80
 4wayCB_2MP 0.89 0.83 0.86 0.87 0.84 0.83
  1. Standard errors of the regression coefficient were ranging between 0.022 and 0.080, with an average standard error of 0.036