Per citar aquest document: http://ddd.uab.cat/record/113314
Pedigree analysis of eight Spanish beef cattle breeds
Gutiérrez, Juan Pablo (Universidad Complutense de Madrid. Departamento de Producción Animal)
Altarriba, Juan (Universidad de Zaragoza. Departamento de Anatomía y Genética)
Díaz, Clara (Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (Espanya))
Quintanilla Aguado, Raquel (Universitat Autònoma de Barcelona. Departament de Ciència Animal i dels Aliments)
Cañón, Javier (Universidad Complutense de Madrid. Departamento de Producción Animal)
Piedrafita Arilla, Jesús (Universitat Autònoma de Barcelona. Departament de Ciència Animal i dels Aliments)

Data: 2003
Resum: The genetic structure of eight Spanish autochthonous populations (breeds) of beef cattle were studied from pedigree records. The populations studied were: Alistana and Sayaguesa (minority breeds), Avileña – Negra Ibérica and Morucha ("dehesa" breeds, with a scarce incidence of artificial insemination), and mountain breeds, including Asturiana de los Valles, Asturiana de la Montaña and Pirenaica, with extensive use of AI. The Bruna dels Pirineus breed possesses characteristics which make its classification into one of the former groups difficult. There was a large variation between breeds both in the census and the number of herds. Generation intervals ranged from 3. 7 to 5. 5 years, tending to be longer as the population size was larger. The effective numbers of herds suggest that a small number of herds behaves as a selection nucleus for the rest of the breed. The complete generation equivalent has also been greatly variable, although in general scarce, with the exception of the Pirenaica breed, with a mean of 3. 8. Inbreeding effective population sizes were actually small (21 to 127), especially in the mountain-type breeds. However, the average relatedness computed for these breeds suggests that a slight exchange of animals between herds will lead to a much more favourable evolution of inbreeding. The effective number of founders and ancestors were also variable among breeds, although in general the breeds behaved as if they were founded by a small number of animals (25 to 163).
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: Beef breeds ; Inbreeding ; Probability of gene origin ; Conservation
Publicat a: Genetics, selection, evolution, Vol. 35 (2003) , p. 43-63, ISSN 0999-193X

DOI: 10.1186/1297-9686-35-1-43


21 p, 243.4 KB

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