Tuyển tập các báo cáo nghiên cứu về sinh học được đăng trên tạp chí sinh học thế giới đề tài: Genetic diversity measures of local European beef cattle breeds for conservation purposes | Genet Sei. Evol. 33 2001 311-332 INRA EDP Sciences 2001 311 Original article Genetic diversitY measures of local European beef cattle breeds for conservation purposes Javier Canona Paolo Alexandrinob Isabel Bessab Carlos Carleosc Yolanda Carreteroa Susana Dunnera Nuno Ferranb David Garciaa Jordi Jordanad Denis Laloe Albano Pereirab Armand Sanchezd Katayoun Moazami-Goudarzi a Laboratorio de Genética Facultad de Veterinaria Universidad Complutense de Madrid 28040 Madrid Spain b Faculdade Ciencias Porto 04021 Porto Portugal c Facultad de Ciencias Universidad de Oviedo 33007 Oviedo Spain d Facultad de Veterinaria Universidad Autónoma de Barcelona 08193 Bellaterra Spain e Institut national de la recherche agronomique Département de génétique animale 78352 Jouy-en-Josas France Received 4 August 2000 accepted 2 January 2001 Abstract - 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 in the Pirenaica breed to in the Barrosa breed. Seven percent of the total genetic variability can be attributed to differences among breeds mean Fst p . 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 .
