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.: Home > Animal Science Papers and Reports > 2008 > Volume 26 Number 2 > Jolanta Komisarek*, Arkadiusz Michalak

A relationship between DGAT1 K232A polymorphism and selected reproductive traits in Polish Holstein-Friesian cattle

Jolanta Komisarek*, Arkadiusz Michalak
Department of Cattle Breeding and Milk Production, The August Cieszkowski Agricultural University of Poznaٌ, Wojska Polskiego 71 A, 60-625 Poznaٌ, Poland
Abstract :

The aim of the study was to analyse the relationship between DGAT1 K232A polymorphism and
bullsپf breeding value for five reproductive traits . age at first insemination, calving-to-conception
interval, calving-to-first service interval, non-return rate in heifers, and non-return rate in cows.
The investigation was conducted on 264 Polish Black-and-White (Polish Holstein-Friesian) bulls
from the active dairy population. DGAT1 genotypes were identified using the PCR-RFLP technique.
The K and A allele frequencies were 0.38 and 0.62, respectively. Homozygotes AA were characterized
by highest breeding values of non-return rates, both in heifers and in cows. On the contrary, for the
age at first insemination and for calving-to-conception and calving-to-first service intervals, the
most favourable seemed to be the KK genotype. However, the significant effect of AA (P.0.01) was
obtained only for non-return rate in cows.

Keywords :
breeding value /cattle / DGAT1 / gene polymorphism / non-return rate / reproductive traits

Date Deposited : 08 Aug 2011 10:14

Last Modified : 08 Aug 2011 10:14

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Volume 26, Number 2, - 2008

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