Association of bGH and Pit-1 gene variants with milk production traits in dairy Gyr bulls

Pesquisa Agropecuária Brasileira

Keiko Kusamura De Mattos²  Silvia Nassif Del Lama²  Mario Luiz Martinez¹  Ary Ferreira Freitas¹ 

[1] ,Universidade Federal de São Carlos Dep. de Genética e Evolução São Carlos SP ,Brazil

关键词: dairy cattle;    genetic markers;    polymorphism;    zebu;    gado leiteiro;    marcador genético;    polimorfismo;    zebu;   

DOI  :  10.1590/S0100-204X2004000200007

来源: SciELO

【 摘 要 】

The objective of this study was to obtain genetic marker information in the Gyr breed by analyzing bGH and Pit-1 gene polymorphisms and to verify their association with milk production traits. One sample including 40 Gyr bulls were genotyped at two bGH gene restriction sites (bGH- AluI and bGH-MspI) and at one restriction site in the Pit-1 gene (Pit-1 HinfI). The bGH-MspI(-) allele was favorable for fat milk percentage. The heterozigous Pit-1 HinfI (+/-) bulls were superior for fat milk production, in relation to homozigous Pit-1 HinfI (+/+). The Pit-1 and bGH genes are strong candidates in the dairy cattle QTL search, and zebuine populations are promising samples for this purpose.

【 授权许可】

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