Table 6 Estimated prediction accuracy: correlation between predicted and adjusted grain yield, averaged over 50 TRN-TST partitions), cycle 2010−2011 (W1), CV1
Model/EnvironmentsaCorrelationChange%bNumberc
Single environment
 0iBN0.530(0.039)
 2iBN0.629(0.038)
 5iBNZ0.472(0.054)
 5iFN0.486(0.050)
Pairs of environmentsInteraction ModelAcross-Env Model
 0iBNCor = 0.530.529(0.038)0.523(0.042)−0.3%; 1.1%21; 33
 2iBN0.619(0.039)0.593(0.041)−1.6%; 4.3%12; 49
 0iBNCor = 0.250.527(0.041)0.467(0.045)−0.6%; 12.8%19; 50
 5iBNZ0.468(0.053)0.375(0.052)−1%; 24.8%8; 49
 0iBNCor = 0.260.534(0.038)0.494(0.044)0.7%; 8%40; 48
 5iFN0.485(0.050)0.431(0.050)−0.2%; 12.5%26; 49
 2iBNCor = 0.340.633(0.039)0.576(0.045)0.8%; 10%37; 50
 5iBNZ0.477(0.050)0.428(0.047)0.9%; 11.2%29; 46
 2iBNCor = 0.330.625(0.041)0.555(0.044)−0.6%; 12.5%18; 50
 5iFN0.479(0.051)0.422(0.056)−1.4%; 13.5%15; 49
 5iBNZCor = 0.220.466(0.053)0.406(0.056)−1.3%; 14.8%15; 50
 5iFN0.483(0.051)0.448(0.053)−0.6%; 8%18; 48
All environments
 0iBN0.530(0.041)0.483(0.048)0%; 9.7%24; 49
 2iBN0.625(0.042)0.558(0.046)−0.5%; 12.1%19; 50
 5iBNZ0.462(0.050)0.366(0.051)−2.2%; 26.3%13; 50
 5iFN0.470(0.049)0.394(0.056)−3.3%; 19.2%9; 50
  • TRN-TST, training-testing.

  • a Environments are described by a sequence of codes: 0i, 2i, and 5i denote the number of irrigation cycles; B/F denotes whether the planting system was “bed” (B) or “flat” (F); N/H denotes whether planting date was normal (N) or late (H, simulating heat); Z indicates no tillage.

  • b Change in prediction accuracy of the M×E model relative to the prediction accuracy of the single-environment (before semicolon) and relative to the prediction accuracy of the across-environment model (after semicolon).

  • c Number of partitions (of 50) for which the M×E model gave greater accuracy than the single-environment (before semicolon) and the across-environment model (after semicolon).