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Genetic characterization of Latin‐American Creole cattle using microsatellite markers

2011; Wiley; Volume: 43; Issue: 1 Linguagem: Inglês

10.1111/j.1365-2052.2011.02207.x

1365-2052

Juan Vicente Delgado Bermejo, Amparo Martínez, Atzel Cândido Acosta Abad, L. A. Álvarez, Eileen Armstrong, Emilio Camacho Poyato, Javier Cañón, O. Cortés, S. Dunner, Vincenzo Landi, J. R. F. Marques, Inmaculada Martín‐Burriel, Orlando Martínez, R. D. Martínez, L. M. Melucci, Jaime Eduardo Muñoz Flórez, M. C. T. Penedo, A. Postiglioni, J. Quiróz, C. Rodellar, P. Sponenberg, Odalys Uffo, Raúl Ullóa-Arvízu, J. L. Vega‐Pla, A. Cortes, Dayana Aracely Espinoza Zambrano, P. Zaragoza, L.T. Gama, Catarina Ginja,

Identification and Quantification in Food

Genetic diversity in and relationships among 26 Creole cattle breeds from 10 American countries were assessed using 19 microsatellites. Heterozygosities, F-statistics estimates, genetic distances, multivariate analyses and assignment tests were performed. The levels of within-breed diversity detected in Creole cattle were considerable and higher than those previously reported for European breeds, but similar to those found in other Latin American breeds. Differences among breeds accounted for 8.4% of the total genetic variability. Most breeds clustered separately when the number of pre-defined populations was 21 (the most probable K value), with the exception of some closely related breeds that shared the same cluster and others that were admixed. Despite the high genetic diversity detected, significant inbreeding was also observed within some breeds, and heterozygote excess was detected in others. These results indicate that Creoles represent important reservoirs of cattle genetic diversity and that appropriate conservation measures should be implemented for these native breeds in order to minimize inbreeding and uncontrolled crossbreeding.