Reis, ClaraNavas, D.Pereira, M.Cravador, A.2012-06-092012-06-092001Reis, Clara; Navas, D.; Pereira, M.; Cravador, Alfredo. Growth hormone AluI polymorphism analysis in eight Portuguese bovine breeds. Archivos de Zootecnia, 50, 189-190, 41-48, 2001.1885-4494AUT: ACR00659;http://hdl.handle.net/10400.1/1210A total of 195 bulls of eight Portuguese beef cattle breeds (Alentejana, Arouquesa, Barros , Maronesa, Marinhoa, Mertolenga, Mirandesa and Preta) were genotyped for the GH AluI polymorphism by the polymerase chain reaction and restriction length polymorphism (PCRRFLP). The genotype and gene frequencies for each breed were determined and shown to be quite variable among the breeds. The overall gene frequencies for L and V were 0.759 and 0.241, respectively. The relation between the bGH-AluI polymorphism and growth performances was ascertained in 168 of the animals analysed. According to our results there is a significant association between the genotypes LL and LV of the bGH and the average live body weight of the animals of the breeds Alentejana, Marinhoa and Preta.engSomatotropinPolymorphismMeat productionPCR-RFLPjournal article2012-06-03