Effects of DGAT1 variants on milk production traits in Jersey cattle

• Autorzy: Komisarek J , Waskowicz K. , Michalak A. , Dorynek Z.
• Języki publikacji: EN

Abstrakty

EN

The aim of the study was to analyse the K232A polymorphism in the acyl CoA:diacylglycerol acyltransferase gene (DGAT1) and to estimate the effects of lysine (K) and alanine (A) encoding variants on milk yield and composition in cattle. A total of 100 Jersey cows was tested for DGAT1 genotypes using the PCR-RFLP technique. The K and A allele frequencies were 0.83 and 0.17, respectively.Effect of the K232A polymorphism on most considered traits was observed. The lysine encoding variant was associated with the high milk fat yield as well as fat and protein contents, whereas the alanine allele was related to the increased milk yield. The most significant result was obtained for the fat content of milk. None of the dominance effects proved to be significantly different from zero,that indicates the additive effect of the gene.

PL

Celem pracy była analiza polimorfizmu K232A w genie acylotransferazy diacyloglicerolowej (DGAT1) oraz oszacowanie wpływu alleli kodujących lizynę (K) i alaninę (A) na wydajność i skład mleka bydła.Badaniem objęto 100 krów rasy jersey. Genotypy DGAT1 identyfikowano metodą PCR-RFLP. Frekwencje alleli K i A wynosiły odpowiednio 0.83 i 0.17. Zaobserwowano wpływ polimorfizmu K232A na większość analizowanych cech. Allel kodujący lizynę związany był z wyższym procentem tłuszczu i białka w mleku oraz wyższą wydajnością tłuszczu, natomiast allel kodujący alaninę zwiększał wydajność mleka. Najbardziej istotny wynik uzyskano dla zawartości tłuszczu w mleku. Dla żadnej z analizowanych cech efekt nominacyjny nie był istotnie różny od zera, co wskazuje na addytywne działanie genu.

Słowa kluczowe

EN

animal genetics; gene polymorphism; cattle; animal breeding; DGAT1 gene; milk production; milk trait; Jersey cattle

• Wydawca: -
• Czasopismo: Animal Science Papers and Reports
• Rocznik: 2004
• Tom: 22
• Numer: 3
• Opis fizyczny: p.307-313,fig.,ref.

Twórcy

autor

Komisarek J

• Agricultural University, Wojska Polskiego 71A, 60-625 Poznan, Poland

autor

Waskowicz K.

autor

Michalak A.

autor

Dorynek Z.

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