TAILIEUCHUNG - Báo cáo sinh học: "An overview of the Weitzman"

Tuyển tập các báo cáo nghiên cứu về sinh học được đăng trên tạp chí sinh Original cung cấp cho các bạn kiến thức về sinh học đề tài: An overview of the Weitzman. | 149 Genet. Sei. Evol. 30 1998 149-161 Inra Elsevier Paris Original article An overview of the Weitzman approach to diversity Caroline Thaon d Arnoldi Jean-Louis Foulley Louis Ollivier Station de génétique quantitative et appliquée Institut national de la recherche agronomique 78352 Jouy-en-Josas cedex France Received 10 July 1997 accepted 30 January 1998 Abstract - The diversity of a set of breeds or species is defined in the Weitzman approach by a recursion formula using the pairwise genetic distances between the elements of the set. The algorithm for computing the diversity function of Weitzman is described. It also provides a taxonomy of the set which is interpreted as the maximum likelihood phylogeny. The theory is illustrated by an application to 19 European cattle breeds. The possible uses of the method for defining optimal conservation strategies are briefly discussed. Inra Elsevier Paris diversity taxonomy conservation phylogeny genetic distance Résumé Un aperọu sur 1 approche de la diversite selon Weitzman. La diversite d un ensemble d especes OU de races est definie par Weitzman de fa on recursive les données de depart sont les distances génétiques entre les elements de 1 ensemble pris deux à deux. L algorithme de calcul de la diversite fournit comme résultat intermediate un arbre de classement des espèces en presence qui est interprété comme une phylogénie du maximum de vraisemblance. La théorie est illustrée par un exemple d application à 19 races bovines européennes et les utilisations possibles de la methode pour definir des strategies optimales de conservation sont discutées brièvement. Inra Elsevier Paris diversité I taxonomie conservation phylogénie distance génétique 1. INTRODUCTION The question of preserving biological diversity is currently attracting a great deal of attention. Choices are necessary when it comes to deciding which endangered species must be protected and which not. Conserving breeds of farm animals or domestic animal diversity .

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