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Table 1 Summary of the pedigree information of milk yield data in 3X and 4X milking frequency

From: Influence of milking frequency on genetic parameters associated with the milk production in the first and second lactations of Iranian Holstein dairy cows using random regression test day models

  Number of
Trait Milking frequency Animal Records Sire Dam Herd
Milk yield 3 18,764 117,168 1002 16,458 112
4 2810 25436 296 2198 8