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Published online by Cambridge University Press: 27 March 2009
Genetic variation was analysed in cattle from the central area of Spain, in 1993, for the following microsatellite loci: CYP21, BOVTAU, ETH131, ILSTS002 and ILSTS005. The breeds studied were Morucha (n = 104), Sayaguesa (n = 60), Brown Swiss (n = 90) and two different populations of Avilena-Negra Iberica (n = 134 and n = 104). Morucha cattle showed the largest number of different alleles (66), whereas Sayaguesa exhibited the lowest (38). Values of number of observed alleles, gene diversity, polymorphism information content and effective number of alleles indicated that the microsatellite showing the highest variability was CYP21, followed by ETH131, ILSTS002, BOVTAU and ILSTS005.