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.: Home > Animal Science Papers and Reports > 2008 > Volume 26 Number 1 > Joanna Nowacka-Woszuk, Aleksandra Noskowiak, Tomasz Strabel, Tomasz Jankowski, Marek Œwitoٌski*

An effect of the DGAT1 gene polymorphism on breeding value of Polish Holstein-Friesian sires

Joanna Nowacka-Woszuk, Aleksandra Noskowiak, Tomasz Strabel, Tomasz Jankowski, Marek Œwitoٌski*
Department of Genetics and Animal Breeding, Agricultural University of Poznaٌ, Wolyٌska 33; 60-637 Poznaٌ, Poland
Abstract :

The effect of the GCپ¨AA polymorphism in the DGAT1 gene causing amino acid substitution (lysine
. K to alanine . A) was estimated on the breeding value (BV) of 89 Polish Holstein-Friesian sires. A
fragment of 411 bp of the DGAT1 gene was analysed by RFLP (Cfr1) or MSSCP (screening for other
substitutions). Only GCپ¨AA in exon 8 dinucleotide substitution was identified causing K232A
amino acid substitution. The frequencies of K and A alleles were 0.54 and 0.46, respectively. The
KK genotype (compared to AA and KA) was found associated with higher BV for fat and protein
content of milk and lower BV for milk and protein yields. Distribution of the polymorphism within
the Holstein-Friesian population, as well as its effect on bull BV are discussed.

Keywords :
breeding value / cattle / DGAT1 / Holstein-Friesian / milk production traits

Date Deposited : 06 Aug 2011 10:58

Last Modified : 06 Aug 2011 10:58

Official URL: http://www.ighz.edu.pl/

Volume 26, Number 1, - 2008

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