A genomewide association mapping study using ultrasound‐scanned information identifies potential genomic regions and candidate genes affecting carcass traits in Nellore cattle |
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| Authors: | MHA Santana RV Ventura YT Utsunomiya HHR Neves PA Alexandre GA Oliveira Junior RC Gomes MN Bonin LL Coutinho JF Garcia SL Silva H Fukumasu PR Leme JBS Ferraz |
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| Institution: | 1. Faculdade de Zootecnia e Engenharia de Alimentos – USP, Pirassununga, Brazil;2. Centre for Genetic Improvement of Livestock, University of Guelph, Guelph, ON, Canada;3. Beef Improvement Opportunties (BIO), Guelph, ON, Canada;4. Faculdade de Ciências Agrárias e Veterinárias, UNESP, Jaboticabal, Brazil;5. GenSys Consultores Associados S/C Ltda, Porto Alegre, Brazil;6. Empresa Brasileira de Pesquisa Agropecuária, CNPGC/EMBRAPA, Campo Grande, Brazil;7. Escola Superior de Agricultura Luiz de Queiroz, USP, Piracicaba, Brazil |
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| Abstract: | The aim of this study was to identify candidate genes and genomic regions associated with ultrasound‐derived measurements of the rib‐eye area (REA), backfat thickness (BFT) and rumpfat thickness (RFT) in Nellore cattle. Data from 640 Nellore steers and young bulls with genotypes for 290 863 single nucleotide polymorphisms (SNPs) were used for genomewide association mapping. Significant SNP associations were explored to find possible candidate genes related to physiological processes. Several of the significant markers detected were mapped onto functional candidate genes including ARFGAP3, CLSTN2 and DPYD for REA; OSBPL3 and SUDS3 for BFT; and RARRES1 and VEPH1 for RFT. The physiological pathway related to lipid metabolism (CLSTN2, OSBPL3, RARRES1 and VEPH1) was identified. The significant markers within previously reported QTLs reinforce the importance of the genomic regions, and the other loci offer candidate genes that have not been related to carcass traits in previous investigations. |
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| Keywords: |
Bos indicus
candidate genes fat thickness genomewide association studies single nucleotide polymorphisms ultrasonography |
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