Resumen

GARZA-BRENNER, Estela et al. Effect of three genetic markers on the feed efficiency of young bulls in a behavior test. Ecosistemas y recur. agropecuarios [online]. 2019, vol.6, n.18, pp.581-586.  Epub 20-Feb-2020. ISSN 2007-901X.  https://doi.org/10.19136/era.a6n18.2135.

The effect of three localized genetic markers in growth hormone (GH), Insulin-like growth factor 1 (IGF-1) and leptin (LEP) genes on feed efficiency indicators was evaluated using records from 136 young bulls of the Charolais, Angus and Brangus breeds during a productive behavior test. The analysis of association between the genotypes obtained and the productive traits evaluated showed a significant effect of the GH-Alu marker on CRA (p = 0.032) in the Angus breed, and in the Charolais one; this result shows that its inclusion in the initial efforts for the determination of efficiency phenotypes in Mexico and its consequent application in selection and breeding strategies are possible.

Palabras llave : Beef cattle; residual consumption; GH; IGF-1; LEP; single-nucleotide polymorphism.