Candidate SNPs for carcass and meat traitsin Nelore animals and in their crosses with Bos taurus

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Abstract

The objective of this work was to evaluate the effects of single-nucleotide polymorphisms (SNPs) in the genes IGF1(AF_017143.1:g.198C>T), MSTN(AF_320998.1:g.433C>A), MYOD1 (NC_007313:g.1274A>G) and MYF5 (NC_007303:g.1911A>G) on carcass and meattraits in Nelore (Bos indicus) and Nelorex B. taurus. A total of 300 animals were genotyped and phenotyped for rib eye area (REA), backfat thickness (BT), in tramuscular fat(IF), shear force (SF) and myofibrillar fragmentation index (MFI). The effects of allele substitution for each SNP wereestimatedby regression of the evaluated phenotypeson the number of copies of a particular allele using the general linearmodel. The polymorphismat IGF1 was non-informative in Nelore animals. Incrossbred animals, the IGF1 C allele was associated with greater REA. However, this relation was not significant after Bonferroni correction for multipletesting. The A allele of the MSTN polymorphism was absentin Nelore cattle and was only found in two crossbred animals. The polymorphisms of MYOD1 and MYF5 were little informative in Nelore animals with G allele frequency of 0.097 and A allele frequency of 0.031, respectively. These markers show no association with the analyzed traits in the total sample of evaluated animals.

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Curi, R. A., Krauskopf, M. M., Hadlich, J. C., Fortes, M. R. S., Vankan, D. M., Vasconcelos Silva, J. A., … da Mota, M. D. S. (2012). Candidate SNPs for carcass and meat traitsin Nelore animals and in their crosses with Bos taurus. Pesquisa Agropecuaria Brasileira, 47(2), 294–301. https://doi.org/10.1590/S0100-204X2012000200019

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