TAILIEUCHUNG - Báo cáo khoa hoc:" Genetic parameters of dairy traits in the Alpine and Saanen goat breeds"

Tuyển tập các báo cáo nghiên cứu về sinh học được đăng trên tạp chí sinh học thế giới đề tài: Genetic parameters of dairy traits in the Alpine and Saanen goat breeds | 529 Genet. Sei. Evol. 30 1998 529-534 Inra Elsevier Paris Note Genetic parameters of dairy traits in the Alpine and Saanen goat breeds Sophie Bélichona Eduardo Manfredi0 Agnès Piacèrec a Caprigène France. Agropole route de Chauvigny 86500 Mignaloux-Beauvoir France b Station d amelioration génétique des animaux Institut national de la recherche agronomique BP 27 31326 Castanet-Tolosan cedex France c Institut de 1 élevage 149 rue de Bercy 75595 Paris cedex 12 France Received 4 May 1999 accepted 16 August 1999 Abstract - Genetic parameters for milk fat and protein yields and fat and protein contents were estimated for the Alpine and Saanen goat breeds using an animal model. Edited data included first lactations of 33 431 Alpine and 20 700 Saanen goats kidding in 1996 and 1997. Heritability values ranged from to for yields and from to for solid contents. The main feature observed on genetic correlations was a low genetic opposition between milk yield and fat content about with a high genetic association between fat yields and fat contents up to . Although the differences between genetic parameters of both breeds were rather low the estimates suggest a higher potential for genetic progress in protein content and protein yield in the Alpine breed and a higher potential for joint genetic progress in milk yield and fat content in the Saanen breed. Inra Elsevier Paris goat dairy production genetic parameters Resume Paramètres génétiques de caractères laitiers des races Alpine et Saanen. Les paramètres génétiques des quantités de lait de protéines et de matière grasse et les taux protéique et butyreux sont estimés pour les races Alpine et Saanen en utilisant un modèle animal. Les données correspondent aux premieres lactations de 33 431 Alpine et 20 700 Saanen chèvres durant les campagnes 1996 et 1997. Les héritabilités varient de 0 32 à 0 40 pour les quantités et de 0 50 à 0 60 pour les taux. Les résultats marquants sont la correlation .

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