Investigation of SNPs in the ATP1A2, CA3 an DECR1 genes mapped to porcine chromosome 4: analysis in group of pigs divergent for meat production and quality traits [Single Nucleotide Polymorphism]
2006
Davoli, R. | Fontanesi, L. | Braglia, S. | Nisi, I. | Scotti, E. | Buttazzoni, L. | Russo, V.
Three genes (ATPase, Na+/K+ transporting, alpha 2(+) polypeptide, ATP1A2; carbonic anhydrase III, CA3; 2,4- dienoyl CoA reductase 1, mitochondrial, DECR1), isolated from a porcine skeletal muscle cDNA library and mapped on porcine chromosome 4 (SSC4), were investigated. A new single nucleotide polymorphism (SNP) was identified in the 3'-untranslated region of the CA3 gene and used to genetically map this locus on SSC4 together with the ATP1A2 and DECR1 loci for which SNPs were already reported. Allele frequencies of the three loci were reported for 11 pig breeds (Italian Large White, Italian Landrace, Italian Duroc, Belgian Landrace, Hampshire, Piétrain, Meishan, Cinta Senese, Casertana, Calabrese and Nero Siciliano). Radiation hybrid mapping of these genes confirmed the linkage mapping results as well as mapping information reported by other AA. Then, the SNPs identified in the ATP1A2, CA3 and DECR1 genes were genotyped in Italian Large White and Italian Duroc animal groups with extreme and divergent estimated breeding value for several production traits. For CA3, significant differences in allele frequencies (P0.05) were observed between the extreme groups of pigs for the lean cuts (Italian Large White) and visible intermuscular fat (Italian Duroc) traits. For DECR1, a significant difference in allele frequencies was observed only for the visible intermuscular fat trait. ATP1A2, which maps close to the FAT1 locus, did not show any significant difference. A very high linkage disequilibrium (D'
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