Last advances in genetics and molecular biology have made possible the complete sequencing of bovine genome, as well as open wide a new range on this research area. However, studies involving cattle's genomic data with feed intake and feed efficiency are still rare. Several single nucleotide polymorphisms (SNP) have been identified in taurus beef cattle's genes related to weight gain, carcass quality and other production traits. This project aimed to verify SNP in cattle's genome and to associate these with feed intake and feed efficiency of Nellore cattle, the most expressive and important breed under Brazilian cattle. Data will be used for dry matter intake, feed conversion ratio, partial efficiency of growth and residual feed intake of 400 of this breed. These animals will have their genomic DNA extracted and then individually genotyped by commercial chips (BovineSNP50 Beadchip®, Illumina Inc). These genomic data will be used in conjunction with the phenotypic data for the characterization of SNP to calculate gene and genotypic frequencies, additive, allele substitution and dominance effects. In addition, pedigree data will be included to estimate the molecular breeding value of each animal using GBLUP and Bayesian (Bayes A, B, C, CÀ and DÀ) methods.
News published in Agência FAPESP Newsletter about the scholarship: