Resumo

MARTINEZ-VELAZQUEZ, Guillermo et al. Criollo Coreño cattle in western Mexico: characterization, challenges and outlook. Rev. mex. de cienc. pecuarias [online]. 2021, vol.12, suppl.3, pp.23-38.  Epub 24-Jan-2022. ISSN 2448-6698.  https://doi.org/10.22319/rmcp.v12s3.5884.

The National Institute of Forestry, Agricultural and Livestock Research (INIFAP) in Mexico has been studying the Criollo Coreño (C) cattle of the Sierra Madre Occidental for over 20 yr. This review covers productive, genetic and molecular characterization, as well as short-, medium- long-term research challenges and outlooks. Evaluations have been done of 35 growth, carcass quality, fertility and milk production traits in C, Guzerat (G), CG and GC cattle generated through diallelic crossing. Individual heterosis was found to affect reproduction and milk production, while maternal heterosis influenced kilograms of calf weaned per cow exposed. Direct and maternal genetic effects had no relevant influence on the analyzed variables. In other studies, C bulls fed high energy diets were found to produce meat with favorable fatty acid profiles and good quality carcasses, while low doses of FSH can be used for superovulation in C heifers, without affecting embryo production. Overall, the results indicate that GC cows are the best option for calf production, and that the C population maintains significant levels of genetic diversity. Further genetic diversity research is needed on Mexican Criollo cattle populations using molecular genetics; Criollo herds must be included in the systematic recording of phenotypes of productivity and adaptability to be able to identify genes of interest unique to Criollo cattle.

Palavras-chave : Beef cattle; Productive characterization; Criollo Coreño; Diallelic cross; Genetic diversity; Heterosis.

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