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

• Autorzy: Komisarek J , Michalak A.

Warianty tytułu

PL

Zaleznosc miedzy polimorfizmem DGAT1 K232A a wybranymi cechami reprodukcyjnymi bydla rasy polskiej holsztynsko-fryzyjskiej

• Języki publikacji: EN

Abstrakty

EN

The aim of the study was to analyse the relationship between DGAT1 K232A polymorphism and bulls’ 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.

PL

Celem pracy była analiza zależności między polimorfizmem DGAT1 K232A a wartością hodowlaną buhajów pod względem pięciu cech reprodukcyjnych – wieku pierwszego unasienienia, okresu międzyciążowego, okresu od ocielenia do pierwszego unasienienia, wskaźnika niepowtarzalności unasieniania jałówek oraz wskaźnika niepowtarzalności unasieniania krów. Badaniem objęto 264 buhaje rasy polskiej holsztyńsko-fryzyjskiej z aktywnej populacji bydła mlecznego. Genotypy DGAT1 identyfikowano metodą PCR-RFLP. Frekwencje alleli K i A wynosiły odpowiednio 0,38 i 0,62. Zwierzęta homozygotyczne pod względem allelu A charakteryzowały się najwyższą wartością hodowlaną wskaźnika niepowtarzalności unasieniania, zarówno jałówek, jak i krów. Natomiast pod względem wieku pierwszego unasienienia i okresów międzyciążowych oraz okresów od ocielenia do pierwszego unasienienia najkorzystniejszy okazał się genotyp KK. Statystycznie istotny (P≤0,01) wpływ genotypu AA udowodniono jednak tylko dla wskaźnika niepowtarzalności unasieniania krów.

Słowa kluczowe

EN

diacylglycerol acyltransferase; animal breeding; DGAT1 gene; breeding value; cattle; Polish Holstein-Friesian breed; reproductive trait; insemination; gene polymorphism

• Wydawca: -
• Czasopismo: Animal Science Papers and Reports
• Rocznik: 2008
• Tom: 26
• Numer: 2
• Opis fizyczny: p.89-95,ref.

Twórcy

autor

Komisarek J

• The August Cieszkowski Agricultural University of Poznan, Wojska Polskiego 71A, 60-625 Poznan, Poland

autor

Michalak A.

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