Table 1 Average (standard deviation) performance test statistics for the purebred and crossbred populations
From: Selection for social genetic effects in purebreds increases growth in crossbreds
Performance records | Yorkshire*Landrace | Landrace | Yorkshire |
|---|---|---|---|
Group size (number) | 17.4 (1.1) | 10.8 (2.2) | 11.9 (1.9) |
Age at start of test (days) | 82.1 (5.3) | 80.6 (7.9) | 84.8 (8.9) |
Age at end of test (days) | 130.2 (6.1) | 140.2 (16.0) | 144.3 (17.2) |
Duration of test period (days) | 48.2 (2.7) | 64.4 (8.6) | 65.1 (9.1) |
Weight at start of test (kg) | 34.0 (6.2) | 30.1 (1.9) | 29.9 (1.8) |
Within-group standard deviation in starting weight | 5.2 (1.3) | 1.6 (0.4) | 1.4 (0.5) |
Average daily gain (g/day) | 1012 (148) | 1018 (128) | 1009 (124) |