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Journal of Heredity 2004:95(3):250-256
© 2004 The American Genetic Association

Brief Communication

Genetic Diversity between Piedmontese, Maremmana, and Podolica Cattle Breeds

B. Moioli, F. Napolitano, and G. Catillo

From the Istituto Sperimentale per la Zootecnia, via Salaria 31, 00016 Monterotondo, Italy.

Address correspondence to Bianca Moioli at the address above, or e-mail: bianca.moioli{at}isz.it.

One hundred twenty animals of three native Italian cattle breeds, Piedmontese, Maremmana, and Podolica, were genetically characterized at 21 microsatellite loci located on 13 chromosomes. Allele numbers ranged from 3 to 19; average gene diversity ranged from 0.206 to 0.878 (average 0.738). The breed that preserved the highest genetic variability was the Podolica, where the chosen markers show the highest gene diversity (0.741) and the highest heterozygosity (0.155). The lowest inbreeding rate (0.102) was registered by the Piedmontese. Genetic distances were 0.069 (Piedmontese versus Maremmana), 0.050 (Piedmontese versus Podolica), and 0.041 (Maremmana versus Podolica) and reflect the different phylogenetic origins of the breeds: Maremmana and Podolica originated from the Grey Steppe cattle group, while Piedmontese belongs to the Northern Italy Lowland cattle group. Observed heterozygosity was not significantly different from expected in any of the breeds, which is an indication that they maintain a random mating structure. The probabilistic assignment of all sampled individuals to three theoretical populations, on the basis of allele frequencies, indicated that 82% of Piedmontese, 66% of Maremmana, and 33% of Podolica can be assigned to the appropriate breed with a probability higher than 90%. This result very well reflects the impact of the selection activity on the breed genetic structure. The chosen microsatellites proved to be a good tool for describing the correct reality of the analyzed populations, but they are not sufficient to discriminate between breeds.


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