Effect of season, genetic line, and sire on growth concentrations of somatotropin in serum of Holstein cows in early lactation.

doi:10.3168/jds.S0022-0302(91)78506-8

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Article

Effect of season, genetic line, and sire on growth concentrations of somatotropin in serum of Holstein cows in early lactation.

Journal of dairy science - 1 Sept 1991

Beerepoot G M, Freeman A E, Detilleux J C

Abstract excerpt

To determine the effect of selection for milk yield on somatotropin concentrations, blood samples were collected from 128 Holstein cows whose sires had either high or average predicted differences for milk. The phenotypic difference in milk yield between the high and average yielding groups was 1...

Topics

Animals
Cattle
Female
Genetic Variation
Growth Hormone
Lactation
Milk
Parity
Probability
Seasons

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