Genetic parameters for yield traits of Holsteins, including lactose and somatic cell score.

doi:10.3168/jds.S0022-0302(92)77885-0

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Article

Genetic parameters for yield traits of Holsteins, including lactose and somatic cell score.

Journal of dairy science - 1 May 1992

Welper R D, Freeman A E

Abstract excerpt

First lactation milk, fat, protein, and lactose yields and percentage yields were analyzed using a multiple-trait sire model including herd-year-season, sire group, and age of cow as fixed effects. Somatic cell score was fit both as a fixed effect in the model and as an additional dependent varia...

Topics

Animals
Breeding
Cattle
Cell Count
Female
Lactation
Lactose
Lipids
Male
Milk
Milk Proteins
Phenotype

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