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Table 1 Descriptive statistics of the persistency and extended lactation traits used in this study

From: Mapping quantitative trait loci (QTL) in sheep. IV. Analysis of lactation persistency and extended lactation traits in sheep

Trait Milk composition n mean SD min max
  Milk 174 0.23 0.13 0.03 0.72
  Protein 162 0.47 0.15 0.14 0.99
Persistency Fat 160 0.40 0.14 0.10 0.79
  Lactose 157 0.35 0.18 0.00 0.71
  Somatic cells 159 0.43 0.07 0.23 0.63
  Useful yield 162 0.65 0.12 0.28 0.91
  Milk 174 0.37 0.15 0.10 0.81
  Protein 161 0.89 0.23 0.42 1.97
Extended lactation Fat 155 0.91 0.18 0.47 1.45
  Lactose 154 0.54 0.33 0.00 1.34
  Somatic cells 159 0.56 0.07 0.38 0.75
  Useful yield 144 1.09 0.30 0.48 1.75
  1. Shown are the number of sheep with observations (n), the average (mean), standard deviation (SD), lowest (min) and highest (max) values of the variables calculated by fitting the Wood model using the nonlinear mixed model procedure in 'R'.