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Table 5 Phenotypic correlations among parameters of lactation curve in different season of calving (spring = upper diagonal, summer = lower diagonal)

From: Effects of season and age at first calving on genetic and phenotypic characteristics of lactation curve parameters in Holstein cows

  a b c Peak time Peak yield Part1 Part2 Part3 Milk 305 Persis1 Persis2
a   −0.87 −0.60 −0.44 0.27 0.46 0.40 0.34 0.40 −0.23 0.12
b −0.86   0.78 0.34 0.13 −0.06 0.009 ns −0.25 −0.11 0.12 −0.28
c −0.59 0.76   −0.21 0.05 −0.05 −0.30 −0.62 −0.37 −0.51 −0.79
Peak time −0.41 0.34 −0.22   0.10 −0.03 0.39 0.50 0.33 0.85 0.71
Peak yield 0.23 0.19 0.06 0.18   0.97 0.89 0.66 0.88 0.09 0.03
Part1 0.42 −0.01 ns −0.05 0.04 0.97   0.86 0.66 0.98 −0.00 ns 0.01 ns
Part2 0.37 0.06 −0.27 0.44 0.90 0.87   0.91 0.94 0.49 0.46
Part3 0.24 −0.18 −0.58 0.54 0.70 0.70 0.92   0.93 0.65 0.74
Milk305 0.36 −0.05 −0.34 0.38 0.89 0.99 0.94 0.89   0.43 0.46
Persis1 −0.24 0.16 −0.49 0.85 0.16 0.05 0.51 0.66 0.46   0.90
Persis2 0.11 −0.24 −0.77 0.70 0.08 0.05 0.47 0.73 0.48 0.90