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Genetic characterization of Latin‐American Creole cattle using microsatellite markers
Author(s) -
Delgado J. V.,
Martínez A. M.,
Acosta A.,
Álvarez L. A.,
Armstrong E.,
Camacho E.,
Cañón J.,
Cortés O.,
Dunner S.,
Landi V.,
Marques J. R.,
MartínBurriel I.,
Martínez O. R.,
Martínez R. D.,
Melucci L.,
Muñoz J. E.,
Penedo M. C. T.,
Postiglioni A.,
Quiróz J.,
Rodellar C.,
Sponenberg P.,
Uffo O.,
UlloaArvizu R.,
VegaPla J. L.,
Villalobos A.,
Zambrano D.,
Zaragoza P.,
Gama L. T.,
Ginja C.
Publication year - 2012
Publication title -
animal genetics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.756
H-Index - 81
eISSN - 1365-2052
pISSN - 0268-9146
DOI - 10.1111/j.1365-2052.2011.02207.x
Subject(s) - biology , genetic diversity , inbreeding , breed , microsatellite , creole language , crossbreed , genetic distance , genetic variability , genetics , genetic variation , allele , population , genotype , demography , philosophy , sociology , gene , linguistics
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.