Estimation of genetic parameters for growth, carcass and overfeeding traits in a white geese strain

Genetics Selection Evolution

Gérard Guy¹  Daniel Rousselot-Pailley¹  Roger Rouvier²  Catherine Larzul² 

[1] Station expérimentale sur les palmipèdes à foie gras, Institut national de la recherche agronomique, Artiguères, 40280 Benquet, France;Station d'amélioration génétique des animaux, Institut national de la recherche agronomique, BP 27, 31326 Castanet-Tolosan, France

关键词: genetic parameters;    hepatic steatosis;    carcass composition;    growth;    geese;   

Others  :  1094785
DOI  :  10.1186/1297-9686-32-4-415

 received in 1999-11-25, accepted in 2000-03-02,  发布年份 2000

【 摘 要 】

In an experimental strain of white plumage geese created in 1989, two experiments were carried out from 1993 to 1995 in order to estimate genetic parameters for growth, and carcass composition traits in non-overfed animals, and genetic parameters for growth and fatty liver formation in overfed animals. Four hundred and thirty-one non-overfed animals were bred and slaughtered at 11 weeks of age; they were measured for forearm length, keel bone length, chest circumference and breast depth before and after slaughtering. The carcasses were partly dissected in order weigh breast, breast muscle and skin + fat, and abdominal fat. Four hundred and seventy-seven overfed animals were slaughtered at 20 weeks of age; they were measured for "paletot" (breast meat, bone and meat from wings, bone and meat from thigh and legs) weight and liver weight. In these two experiments, the weights had moderate to high heritability values. Breast depth measured on live animals showed a low heritability value. In overfed animals, liver weight showed a high heritability value. Liver weight could be increased by selection without a great effect on "paletot" weight. Thus, obtaining a white plumage geese strain for fatty liver production by selection would be difficult because only 20% of overfed animals had fatty liver. The results did not allow to conclude on the influence of selection on liver weight on carcass traits such as muscle or fatty tissue weight.

【 授权许可】

   
2000 INRA, EDP Sciences