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

Pesquisa Agropecuária Brasileira

Rogério Abdallah Curi²  Monique Marcondes Krauskopf²  Janaína Conte Hadlich²  Marina Rufino Salinas Fortes¹  Dianne Margaret Vankan¹  Josineudson Augusto Ii Vasconcelos Silva²  Henrique Nunes De Oliveira¹  Marcílio Dias Silveira Da Mota² 

[1],Universidade Estadual Paulista Faculdade de Medicina Veterinária e Zootecnia Botucatu SP ,Brazil

关键词: Bos indicus;    candidate gene;    fat deposition;    meat tenderness;    polymorphism;    Bos indicus;    gene candidato;    deposição de gordura;    maciez da carne;    polimorfismo;   

DOI  :  10.1590/S0100-204X2012000200019

来源: SciELO

【 摘 要 】

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 meat traits in Nelore (Bos indicus) and Nelore x B. taurus. A total of 300 animals were genotyped and phenotyped for rib eye area (REA), backfat thickness (BT), intramuscular fat (IF), shear force (SF) and myofibrillar fragmentation index (MFI). The effects of allele substitution for each SNP were estimated by regression of the evaluated phenotypes on the number of copies of a particular allele using the general linear model. The polymorphism at IGF1 was non-informative in Nelore animals. In crossbred animals, the IGF1 C allele was associated with greater REA. However, this relation was not significant after Bonferroni correction for multiple testing. The A allele of the MSTN polymorphism was absent in 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.

【 授权许可】

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