01544naa a2200253 a 450000100080000000500110000800800410001910000180006024500950007826000090017350001440018252006950032665000170102165000200103865000170105865000090107565000180108465000230110265000170112570000200114270000200116270000190118277300890120111100762018-08-27       2004    bl uuuu     u00u1 u    #d1 aMATTOS, K. K.  aAssociation of bGH and Pit-1 gene variants with milk production traits in dairy Gyr bulls.  c2004  aTítulo em português: Associação dos variantes dos genes bGH e Pit-1 com características de produção leiteira em touros Gir leiteiro.  aThe 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.  adairy cattle  agenetic markers  apolymorphism  azebu  aGado Leiteiro  aMarcador Genético  aPolimorfismo1 aDEL LAMA, S. N.1 aMARTINEZ, M. L.1 aFREITAS, A. F.  tPesquisa Agropecuária Brasileira, Brasília, DFgv. 39, n. 2, p. 147-150, fev. 2004