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Previous issue date: 2008-07-08 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior / Carcass characteristics of ? Guzer? + ? Nellore (F1) and ? Guzer? + ? Limousin + ?
Nellore (F2) were evaluated. Each experimental group was constituted by twelve
animals. The bovines presented respective average weights to F1 and F2 of 477,50 ?
18,54 and 468,89 ? 21,03 kg at the beginning of experimental period and 526,83 ?
18,77 kg and 516,08 ? 20,03 kg in the slaughter occasion. The steers were maintained
in Panicum maximum cv. Tanz?nia pastures and received feeding, in proportion of 1%
live weight, with 22,2% of crude protein and 72,5% of total digestible nutrients (TDN).
There was no significant difference (P>0,05) between genetic groups to the majority of
body measures, cold carcass, special hindquarter and forequarter weights, special
hindquarter percentage, cold carcass and special hindquarter yield, fat thickness, fat
thickness adjusted to 100 kg of cold carcass, conformation e the variables that express
the carcass physical composition. There was no significant correlation, positive or
negative, between carcass measures and economical interesting characteristics. The F1
animals were superior to F2 to side cut weight, percentage and yield. On the other hand,
the F2 animal presented higher values to spine-loin length, side cut percentage and
yield, loin eye area and loin eye area adjusted to 100 kg of cold carcass when compared
to F1 ones. To the correlations, there was significant and positive association between
thoracic perimeter (0,62), thoracic depth (0,35), rump length (0,40) and cold carcass
weight, as well as there was significant and positive correlations between spine-loin
length and loin eye area (0,61) and cushion thickness and special hindquarter yield
(0,43). Significant and negative correlation was detected between rump length and
muscle yield (-0,43). Considering the experimental condition and the evaluated genetic
groups, it is concluded that F2 animals are longer and present right proportions of
carcass commercial cuts and measures as loin eye area in relation to the F1. Thoracic
perimeter and depth, spine-loin and rump length and cushion thickness are positively
associated to the cold carcass weight, loin eye area and muscle and special hindquarter
yield. / As caracter?sticas da carca?a de novilhos ? Guzer? x ? Nelore (F1) e ? Guzer? x ?
Limousin x ? Nelore (F2) foram avaliadas. Cada grupo experimental era constitu?do
por doze animais. Os bovinos apresentaram pesos m?dios respectivos para F1 e F2 de
477, 50 ? 18,54 e 468,89 ? 21,03 kg no in?cio do per?odo experimental e 526,83 ?
18,77 kg e 516,08 ? 20,03 kg na ocasi?o do abate. Os novilhos foram mantidos em
pastagens de Panicum maximum cv. Tanz?nia e receberam alimenta??o, na propor??o
de 1% do peso vivo, com 22,2% de prote?na bruta e 72,5% de nutrientes digest?veis
totais (NDT). N?o houve diferen?a significativa (P>0,05) entre grupos gen?ticos para a
maioria das medidas corporais, peso da carca?a resfriada, corte serrote e dianteiro,
percentagem do corte serrote, rendimento da carca?a resfriada e do corte serrote,
espessura de gordura de cobertura, espessura de gordura de cobertura ajustada para 100
kg de carca?a resfriada, conforma??o e as vari?veis que expressam a composi??o f?sica
da carca?a. N?o houve correla??o significativa, positiva ou negativa, entre medidas
obtidas na carca?a e caracter?sticas de interesse econ?mico. Os animais F1 foram
superiores aos F2 para peso, percentagem e rendimento do corte costilhar. Por outro
lado, os animais F2 apresentaram valores mais elevados de comprimento dorso-lombo,
percentagem e rendimento do corte dianteiro, ?rea de olho de lombo e ?rea de olho de
lombo ajustada para 100 kg de carca?a resfriada quando comparados aos F1. Para as
correla??es, houve associa??o significativa e positiva entre per?metro tor?cico (0,62),
profundidade tor?cica (0,35), comprimento de garupa (0,40) e peso da carca?a
resfriada, assim como existiram correla??es positivas e significativas entre
comprimento dorso-lombo e ?rea de olho do lombo (0,61) e espessura de cox?o e
rendimento do corte serrote (0,43). Correla??o significativa e negativa foi detectada
entre o comprimento da garupa e rendimento de m?sculo (-0,43). Considerando as
condi??es experimentais e os grupos gen?ticos avaliados, conclui-se que animais F2 s?o
mais longil?neos e apresentam propor??es adequadas dos cortes comerciais da carca?a e
de medidas como a ?rea de olho do lombo em rela??o aos animais F1. O per?metro e a
profundidade tor?cica, o comprimento dorso-lombo e da garupa e a espessura do cox?o
s?o positivamente associados ao peso da carca?a resfriada, ?rea de olho do lombo, e
rendimentos de m?sculo e do corte serrote.
| Identifer | oai:union.ndltd.org:IBICT/oai:localhost:tede/581 |
| Date | 08 July 2008 |
| Creators | Camargo, Andr? Mantegazza |
| Contributors | Rodrigues, Victor Cruz, Morenz, Mirton Jos? Frota |
| Publisher | Universidade Federal Rural do Rio de Janeiro, Curso de P?s-Gradua??o em Zootecnia, UFRRJ, Brasil, Produ??o Animal |
| Source Sets | IBICT Brazilian ETDs |
| Language | Portuguese |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, info:eu-repo/semantics/masterThesis |
| Format | application/pdf |
| Source | reponame:Biblioteca Digital de Teses e Dissertações da UFRRJ, instname:Universidade Federal Rural do Rio de Janeiro, instacron:UFRRJ |
| Rights | info:eu-repo/semantics/openAccess |
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