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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