Data/hora: 15/06/2024 12:48:56

Biblioteca(s): | Embrapa Caprinos e Ovinos.
Data corrente: | 20/09/2007
Data da última atualização: | 20/09/2007
Autoria: | MARTINS, R. R. C.; OLIVEIRA, N. M. de; OSÓRIO, J. C. da S.; OSÓRIO, M. T. M.
Título: | Study of the effect of the genotype-nutrition interaction on liveweight and carcass component in Corriedale and polwarth lambs.
Ano de publicação: | 2006
Fonte/Imprenta: | In: WORLD CONGRESS ON GENETICS APPLIED TO LIVESTOCK PRODUCTION, 8., 2006, Belo Horizonte, MG. Proceedings... Belo Horizonte: Instituto Prociência, 2006. 4 f. 1 CD-ROM.
Idioma: | Inglês

Conteúdo:

With the objective of evaluating the isolated effects of genotype and of nutritional system, as well as the effect of the interaction between genotype and nutrition on liveweight and carcass component, sixty Polwarth male lambs and 51 Corriedale male lamb, born at the end of August and September, raised in three different nutritional systems: 1) native pasture (mainly Paspalum notatum Flügge and Axonopus affinis Chase); 2) improved pasture (Trifolium repens L., Lolium multiflorum Lam. and Lotus corniculatus L.) and 3) confinement receiving a commercial concentrate (17% of crude protein and 75% of energy) and slaughtered with 122 days of age, were examined. The animals were weighed before slaughtering and, after slaughtering, the following traits were measured: hot and cold carcass weights, pelvic fat, conformation, carcass length, loin eye area. Commercial and true carcass yield, carcass losses and compacity were obtained by calculation. The experimental design was a totally randomized in a 3x2 factors (nutritional systems and genotypes). The effect of the nutrition showed equally between the two breeds studied for almost all the analyzed parameters. However, the genotype-nutrition interaction was significant (P<0,05) for pelvic and renal fat and for thickness of covering fat, presenting the breed Ideal larger values for both parameters. When raised on the lower nutritional systems, the breeds Ideal and Corriedale have morphology similar and could be marketed your carcasses in a same specific denomination of meat quality. However, when they are submitted at a higher nutritional level, lambs of the Ideal
breed tends to deposit more fat than Corriedale lambs.

Palavras-Chave: | Peso vivo; Predição de carcaça.
Thesagro: | Cordeiro; Genótipo; Melhoramento Genético Animal; Ovino.
Categoria do assunto: | --
Registro original: | Embrapa Caprinos e Ovinos (CNPC)
Exemplares: | CNPC - (20308-1) - ADD - PL - -- - CD 0171 -  -  - DIS