Autoria: OLIVEIRA, P. S. N.; CESAR, A. S. M.; NASCIMENTO, M. L. do; CHAVES, A. S.; TIZIOTO, P. C.; TULLIO, R. R.; LANNA, D. P. D.; ROSA, A. do N.; SONSTEGARD, T. S.; MOURÃO, G. B.; REECY, J. M.; GARRICK, D. J.; MUDADU, M. de A.; COUTINHO, L. L.; REGITANO, L. C. de A.

Resumo: Feed efficiency is jointly determined by productivity and feed requirements, both of which are economically relevant traits in beef cattle production systems. The objective of this study was to identify genes/QTLs associated with components of feed efficiency in Nelore cattle using Illumina BovineHD BeadChip (770 k SNP) genotypes from 593 Nelore steers. The traits analyzed included: average daily gain (ADG), dry matter intake (DMI), feed-conversion ratio (FCR), feed efficiency (FE), residual feed intake (RFI), maintenance efficiency (ME), efficiency of gain (EG), partial efficiency of growth (PEG) and relative growth rate (RGR). The Bayes B analysis was completed with Gensel software parameterized to fit fewer markers than animals. Genomic windows containing all the SNP loci in each 1 Mb that accounted for more than 1.0% of genetic variance were considered as QTL region. Candidate genes within windows that explained more than 1% of genetic variance were selected by putative function based on DAVID and Gene Ontology.

Ano de publicação: 2014

Tipo de publicação: Artigo de periódico

Unidade: Embrapa Pecuária Sudeste

Palavras-chave: Bos Indicus, Candidate gene, Residual feed intake, single nucleotide polymorphism