| Autor: |
E. Camacho, L.M. Melucci, Oscar Cortés, Luz Angela Alvarez, Luis Telo da Gama, Clementina Rodellar, E. Armstrong, Maria Cecilia T. Penedo, A. Villalobos, O. R. Martinez, Juan Vicente Delgado, Amparo Martínez Martínez, Vincenzo Landi, R. Ulloa-Arvizu, Susana Dunner, Inmaculada Martín-Burriel, J. Quiroz, R. D. Martínez, Jaime Eduardo Muñoz, D. Zambrano, Catarina Ginja, Jose Luis Vega-Pla, Pilar Zaragoza, P. Sponenberg, Javier Cañón, Odalys Uffo, Atzel Acosta, Alicia Postiglioni, José Ribamar Felipe Marques |
| Rok vydání: |
2011 |
| Předmět: |
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| Zdroj: |
Animal Genetics. 43:2-10 |
| ISSN: |
0268-9146 |
| DOI: |
10.1111/j.1365-2052.2011.02207.x |
| Popis: |
Summary 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. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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