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Table 4 Direct and social genetic variances for average daily gain (g/day) on the diagonal, genetic covariances below the diagonal, and genetic correlations above the diagonal from matrix \({\text{G}}_{{\text{Y}}}\) in Model 2 for Yorkshire (\({\text{Y}}\)) and the Y sire component in the crossbreds (\({\text{YL}}\))S

From: Selection for social genetic effects in purebreds increases growth in crossbreds

  Genetic effect \({\mathbf{Y}}\) Sire (\({\mathbf{YL}}\))
Direct Social Direct Social
\({\text{Y}}\) Direct 3150 (129) 0.07 (0.10) 0.41 (0.17) − 0.22 (0.26)
Social 8.8 (13.6) 5.3 (1.7) − 0.75 (0.28) 0.34 (0.42)
Sire (\({\text{YL}}\)) Direct 1669 (720) − 124 (52) 5187 (1378) − 0.48 (0.22)
Social − 64 (76) 4.1 (5.1) − 181 (109) 27.5 (14.3)
  1. Standard errors are shown in brackets