Resumo

DOMINGUEZ MARTINEZ, Miguel Ángel et al. Genetic analysis of Oaxacan Mixteco Creole cattle. Rev. mex. de cienc. pecuarias [online]. 2023, vol.14, n.2, pp.434-449.  Epub 26-Jun-2023. ISSN 2448-6698.  https://doi.org/10.22319/rmcp.v14i2.6315.

The Mixteco Creole cattle is a little explored genetic resource, which, however, has great value due to its potential to be used in production systems that are respectful of the environment and adaptable to its conditions. The identification and characterization of this local resource is essential for its conservation and improvement. For this reason, in the present study it was carried out the analysis of the diversity and genetic relationships of the Mixteco Creole cattle population of Oaxaca, using 19 microsatellite DNA markers and 32 reference cattle populations belonging to the BIOBOVIS consortium of the CONBIAND Network. The mean number of alleles detected was 8.8 ± 2.1 and the estimated effective number of alleles was 4.5 ± 1.2. The genetic diversity represented by the expected (0.7700 ± 0.0682) and observed (0.7170 ± 0.0998) heterozygosity values was within the range of estimators obtained in previous studies with local cattle populations using microsatellite markers. An analysis of the population structure revealed a predominant influence of Iberian germplasm (Bos taurus). There is also a close relationship between the Mixteco Creole and the rest of the Mexican Creole cattle populations, with the exception of the Tropical Dairy Creole.

Palavras-chave : Conservation; Creole cattle; Genetic characterization; Microsatellites.