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Titolo:
SELECTION FOR CARCASS AND FEEDLOT TRAITS CONSIDERING ALTERNATIVE SLAUGHTER END-POINTS AND OPTIMIZED MANAGEMENT
Autore:
WILTON JW; GODDARD ME;
Indirizzi:
VICTORIAN INST ANIM SCI,DEPT AGR MELBOURNE VIC AUSTRALIA
Titolo Testata:
Journal of animal science
fascicolo: 1, volume: 74, anno: 1996,
pagine: 37 - 45
SICI:
0021-8812(1996)74:1<37:SFCAFT>2.0.ZU;2-D
Fonte:
ISI
Lingua:
ENG
Soggetto:
ECONOMIC WEIGHTS; GENETIC-IMPROVEMENT; BREEDING OBJECTIVES; BEEF-PRODUCTION; COW WEIGHT; CATTLE; SYSTEM; DERIVATION; VARIABLES; STATION;
Keywords:
BEEF CATTLE; GENETIC IMPROVEMENT; SELECTION INDEX;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
24
Recensione:
Indirizzi per estratti:
Citazione:
J.W. Wilton e M.E. Goddard, "SELECTION FOR CARCASS AND FEEDLOT TRAITS CONSIDERING ALTERNATIVE SLAUGHTER END-POINTS AND OPTIMIZED MANAGEMENT", Journal of animal science, 74(1), 1996, pp. 37-45

Abstract

Profit was defined as a function of the genotype of animals and variables controlled by management. Alternative parameterizations of management variables were examined to compare the effect of controlling age at slaughter, weight at slaughter, or fat depth at slaughter. The various parameterizations are shown to result in equivalent economic weights for genetic variables, provided management variables are optimized for the current genotype. The implication is that economic weights andselection indexes can be conveniently calculated for age constant endpoints even though commercial production may involve weight or backfat depth constant slaughter points. An example of selection for profit in the feedlot phase of beef production is presented. Three genotype-management combinations were considered. Economic weights and subsequent selection index weights were shown to depend on both average genotypic means and management (feeding and marketing program) factors.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 22/09/20 alle ore 16:49:43