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Identification of genomic regions related to tenderness in Nellore beef cattle

  • M. E. Carvalho (a1), F. S. Baldi (a2), M. H. A. Santana (a1), R. V. Ventura (a3), G. A. Oliveira (a1), R. S. Bueno (a1), M. N. Bonin (a4), F. M. Rezende (a5), L. L. Coutinho (a6), J. P. Eler (a1) and J. B. S. Ferraz (a1)...


The aim of this study was to identify genomic regions that associated with beef tenderness in Nellore cattle. Phenotypes were obtained according to the standard USDA Quality Grade (1999). Data from 909 genotyped Nellore bulls were used in the Genome-Wide Association Study (GWAS) undertaken using a single-step approach including also a pedigree file composed of 6276 animals. The analyses were performed using the Blupf90 software, estimating the effect of genomic windows of 10 consecutive markers. The GWAS results identified 18 genomic regions located on 14 different chromosomes (1, 4, 6, 7, 8, 10, 18, 19, 20, 21, 22, 25, 26 and 29), which explained more than 1% of the total additive genetic variance; several candidate genes were located in these regions including SLC2A9, FRAS1, ANXA3, FAM219A, DNAI, AVEN, SHISA7, UBE2S, CDC42EP5, CNTN3, C16orf96, UBALD1, MGRN1 and SNORA1 With the single-step GWAS, it was possible to identify regions and genes related to meat tenderness in Nellore beef cattle.


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