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Table 6 Phenotypic correlations among parameters of lactation curve in different season of calving (autumn = upper diagonal, winter = 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   −0.86 −0.60 −0.45 0.19 0.39 0.34 0.19 0.32 −0.31 0.07
b −0.87   0.77 0.36 0.22 0.01 0.12 −0.14 0.00 ns 0.22 −0.22
c −0.60 0.77   −0.19 0.10 −0.01 −0.19 −0.53 −0.28 −0.43 −0.75
Peak time −0.48 0.38 −0.17   0.14 0.00 ns 0.40 0.51 0.34 0.86 0.74
Peak yield 0.24 0.16 0.08 0.09   0.97 0.92 0.71 0.90 0.15 0.04
Part1 0.44 −0.04 −0.03 −0.05 0.97   0.88 0.70 0.98 0.02 0.00 ns
Part2 0.37 0.06 −0.23 0.37 0.90 0.87   0.91 0.93 0.48 0.41
Part3 0.25 −0.20 −0.57 0.48 0.68 0.67 0.91   0.90 0.62 0.69
Milk305 0.37 −0.07 −0.32 0.30 0.89 0.98 0.93 0.91   0.42 0.42
Persis1 −0.30 0.21 −0.43 0.86 0.09 −0.02 0.45 0.62 0.40   0.88
Persis2 0.07 −0.22 −0.75 0.72 0.02 −0.01 ns 0.42 0.71 0.42 0.89