R. Bras. Zootec.01/Feb/2009;38(2):265-70.

Association between insulin-like growth factor I (IGF-I) microsatellite polymorphisms and important economic traits in pigs

Danielle Assis de Faria, Jane de Oliveira Peixoto, Paulo Sávio Lopes, Samuel Rezende Paiva, Priscila Vendramini Silva, Simone Eliza Facioni Guimarães

DOI: 10.1590/S1516-35982009000200007

This study investigated the association between IGF-I microsatellite marker in an F2 population (N=459) generated by mating of native boars to Brazilian commercial sows with performance, carcass cut, and meat quality traits. Association analyses were carried out using a statistical model that included genotype, sex, and group as fixed effects and sire as random effect. The IGF-I genotypes were significantly associated with different quantitative traits and these results corroborate with previous QTL analyses obtained for this chromosome region in swine. Additive and dominance effects, as well as a genotype-sex interaction, were estimated and discussed in the text. According to the results obtained, this marker is suitable for QTL search in the genotyped population.

Association between insulin-like growth factor I (IGF-I) microsatellite polymorphisms and important economic traits in pigs

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