Per citar aquest document: http://ddd.uab.cat/record/113318
Genetic diversity measures of local European beef cattle breeds for conservation purposes
Cañón, Javier (Universidad Complutense de Madrid. Facultad de Veterinaria)
Alexandrino, Paolo (Faculdade Ciencias Porto (Porto, Portugal))
Bessa, Isabel (Faculdade Ciencias Porto (Porto, Portugal))
Carleos, Carlos (Facultad de Ciencias, Universidad de Oviedo)
Carretero, Yolanda (Universidad Complutense de Madrid. Facultad de Veterinaria)
Dunner, Susana (Universidad Complutense de Madrid. Facultad de Veterinaria)
Ferran, Nuno (Faculdade Ciencias Porto (Porto, Portugal))
García, David (Universidad Complutense de Madrid. Facultad de Veterinaria)
Jordana, Jordi (Universitat Autònoma de Barcelona. Departament de Ciència Animal i dels Aliments)
Laloë, Denis (Institut national de la recherche agronomique (França))
Pereira, Albano (Faculdade Ciencias Porto (Porto, Portugal))
Sánchez Bonastre, Armando (Universitat Autònoma de Barcelona. Departament de Ciència Animal i dels Aliments)
Moazami-Goudarzi, Katayoun (Institut national de la recherche agronomique (França))

Data: 2001
Resum: This study was undertaken to determine the genetic structure, evolutionary relationships, and the genetic diversity among 18 local cattle breeds from Spain, Portugal, and France using 16 microsatellites. Heterozygosities, estimates of Fst, genetic distances, multivariate and diversity analyses, and assignment tests were performed. Heterozygosities ranged from 0. 54 in the Pirenaica breed to 0. 72 in the Barrosã breed. Seven percent of the total genetic variability can be attributed to differences among breeds (mean Fst = 0. 07; P < 0. 01). Five different genetic distances were computed and compared with no correlation found to be significantly different from 0 between distances based on the effective size of the population and those which use the size of the alleles. The Weitzman recursive approach and a multivariate analysis were used to measure the contribution of the breeds diversity. The Weitzman approach suggests that the most important breeds to be preserved are those grouped into two clusters: the cluster formed by the Mirandesa and Alistana breeds and that of the Sayaguesa and Tudanca breeds. The hypothetical extinction of one of those clusters represents a 17% loss of diversity. A correspondence analysis not only distinguished four breed groups but also confirmed results of previous studies classifying the important breeds contributing to diversity. In addition, the variation between breeds was sufficiently high so as to allow individuals to be assigned to their breed of origin with a probability of 99% for simulated samples.
Drets: Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial i la comunicació pública de l'obra, sempre que no sigui amb finalitats comercials, i sempre que es reconegui l'autoria de l'obra original. No es permet la creació d'obres derivades. Creative Commons
Llengua: Anglès
Document: article ; publishedVersion
Matèria: Local beef cattle breeds ; Microsatellite ; Genetic diversity
Publicat a: Genetics, selection, evolution, Vol. 33 (May 2001) , p. 311-332, ISSN 0999-193X

DOI: 10.1186/1297-9686-33-3-311


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