Table 2 SD (diagonal) and sample correlation (lower-triangular) between grain yields evaluated under different environmental conditions, by cycle
0iBN2iBN5iBNZ5iFN
W1 (cycle 2010−2011, 45th IBWSN)
 Environment a
  0iBN0.61
  2iBN0.53 (0.47−0.58)0.51
  5iBNZ0.25 (0.18−0.32)0.34 (0.27−0.40)0.60
  5iFN0.26 (0.19 −0.33)0.33 (0.26−0.39)0.22 (0.15−0.29)0.63
W2 (cycle 2011−2012, 46th IBWSN)
 Environment0iFN5iBH5iBN5iFN
  0iFN0.54
  5iBH0.34 (0.27−0.41)0.60
  5iBN−0.05 (-0.13,0.02)0.33 (0.26,0.39)0.65
  5iFN0.31 (0.24−0.38)0.41 (0.35,0.47)0.41 (0.35−0.47)0.58
W3 (cycle 2012−2013, 47th IBWSN)
 Environment0iFN2iBN5iBH5iBN5iFN
  0iFN0.51
  2iBN0.17 (0.10−0.23)0.41
  5iBH0.30 (0.24−0.36)−0.03 (-0.10, 0.04)0.60
  5iBN−0.10 (−0.16, −0.03)0.12 (0.05−0.19)−0.09 (−0.16, −0.02)0.49
  5iFN−0.01 (−0.08, 0.06)0.04 (−0.03, 0.10)0.02 (−0.05, 0.09)0.55 (0.50−0.59)0.51
  • 95% confidence interval for the correlations are given in parentheses. IBWSN, International Bread Wheat Screening Nurseries

  • 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.