Variabilidad del DNA mitocondrial en razas ovinas ibéricas
Year: 2007
Type: article
Abstract: Mitochondrial DNA variability was studied in indigenous Iberian sheep and results analysed for each of the four morphological trunks. Three maternal lineages, B, A and C were identified. Mean nucleotide diversity for each of the ovine groups was estimated, showing a lower value for the churro trunk, intermediate values for entrefino and merino trunks, while the iberian group had the greatest mitochondrial diversity. Within the churro trunk all mitochondrial DNA sequences belonged to haplogroup B, also known as European type, and among churro breeds Latxa sheep showed the lowest diversity of all Iberian sheep analysed. A few animals of the entrefino trunk showed a maternal A, or Asiatic, lineage, namely Spanish Manchega and Portuguese Serra da Estrela sheep. In the merino group Merino Branco breed showed differences with the rest of sheep, particularly much greater nucleotide diversity and the presence of animals of maternal lineage A. On the other hand, moderate diversity was evident among the rest of merino populations, as it was the case of Spanish pure Merino for which all animals belonged to maternal lineage B. Finally, the iberian trunk showed the highest mean nucleotide diversity and in this group maternal lineage C was identified. The presence of this mitochondrial DNA type was evident in both breeds corresponding to this trunk: Montesina and Ojalada. This result is of particular relevance since this maternal lineage has been discovered quite recently and mainly in Asiatic ovines.
Authors: F. San Primitivo, Susana Pedrosa, J. J. Arranz, Nuno V. Brito, A. Molina, Yolanda Bayón
Language: Spanish
Subfield: Genetics
Domain: Life Sciences
Open Access status: green
OpenAlex ID: W2161032540