Elsevier

Journal of Dairy Science

Volume 85, Issue 12, December 2002, Pages 3514-3517
Journal of Dairy Science

Article
Characterization of the DGAT1 Gene in the New Zealand Dairy Population

https://doi.org/10.3168/jds.S0022-0302(02)74440-8Get rights and content
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Abstract

Recently, DGAT1 was identified as the gene that underlies the QTL for bovine milk production on chromosome 14. This study investigated the effect of the reported polymorphism in three dairy breeds in New Zealand. Statistically significant results were identified for milk fat, milk protein, and volume for Jersey and Holstein-Friesian breeds, and only milk volume for Ayrshires. The average allele substitution effects were 2 to 3 kg of protein and 120 to 130l milk for both the Jersey and Holstein-Friesian breeds. For milk fat, the average allele substitution effect was 6 kg for Holstein-Friesians and 3 kg for Jerseys. In all breeds, where the polymorphism increased milk fat yield, it decreased milk protein yield and milk volume.

Key words

DGAT1
dairy cattle
quantitative trait loci

Abbreviations key

DGAT1
acylCoA:diacylglycerol acyltransferase
DYD
daughter yield deviation
K2332A
lysine to alanine amino acid substitution
QTL
quantitative trait loci

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