TAILIEUCHUNG - Báo cáo khoa hoc:" Estimation of the genetic parameters of sexual dimorphism of body weight in ’label’ chickens and Muscovy ducks"

Tuyển tập các báo cáo nghiên cứu về sinh học được đăng trên tạp chí sinh học thế giới đề tài: Estimation of the genetic parameters of sexual dimorphism of body weight in ’label’ chickens and Muscovy ducks | Genet. Sei. Evol. 30 1998 481-491 Inra Elsevier Paris 481 Original article Estimation of the genetic parameters of sexual dimorphism of body weight in label chickens and Muscovy ducks Sandrine Mignon-Grasteaua Catherine Beaumonta Jean-Paul Poiveyb Hubert de Rochambeaub a Station de recherches avicoles Institut national de la recherche agronomique domaine de I Orfrasiere 37380 Nouzilly France b Station d amelioration génétique des animaux Institut national de la recherche agronomique chemin de Borde-Rouge BP 27 Auzeville 31326 Castanet-Tolosan cedex France Received 12 August 1997 accepted 8 June 1998 Abstract - The genetic parameters of sexual dimorphism of body weight were estimated in samples of 16190 chickens and 11328 Muscovy ducks. A multivariate animal model was used and weights of males and females were treated as different traits. Heritabilities were estimated for males and females respectively at and for body weight at 8 weeks in chickens BW8 and in ducks at and for body weight at 6 weeks BW6 and and for weight gain between 6 weeks and slaughter VFG . The estimated genetic correlations between sexes were for BW8 in chickens and and for BW6 and WG in ducks respectively. Maternal heritabilities were generally higher in males than in females. Heritabilities of sexual dimorphism were estimated as for BW8 in chickens and at and for BW6 and WG in Muscovy ducks respectively. Sexual dimorphism in both species was highly and positively correlated with traits of males between and and slightly and positively correlated with growth potential of females between and . Inra Elsevier Paris sexual dimorphism Muscovy duck chicken body weight genetic parameters Resume Estimation des paramètres génétiques du dimorphisme sexuel du poids chez le poulet label et le canard de Barbarie. Les paramètres génétiques du dimorphisme sexuel du poids ont été estimés chez le poulet

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