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Titolo:
GENETIC-PARAMETERS FOR TERMINAL SIRES ESTIMATED USING DATA OF PROGENYFROM BORDER LEICESTER X MERINO EWES
Autore:
KENNEY PA; GODDARD ME; THATCHER LP;
Indirizzi:
RUTHERGLEN RES INST,DEPT AGR,RMB 1145 RUTHERGLEN VIC 3685 AUSTRALIA VICTORIAN INST ANIM SCI,DEPT AGR ATTWOOD VIC 3049 AUSTRALIA
Titolo Testata:
Australian Journal of Agricultural Research
fascicolo: 4, volume: 46, anno: 1995,
pagine: 703 - 719
SICI:
0004-9409(1995)46:4<703:GFTSEU>2.0.ZU;2-L
Fonte:
ISI
Lingua:
ENG
Soggetto:
CARCASS CHARACTERISTICS; ROMNEY LAMBS; LIVEWEIGHT; SELECTION; DEPTH; SHEEP; SEX;
Keywords:
BREED; SEX; GENETIC PARAMETERS; HERITABILITY; CARCASS COMPOSITION;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
20
Recensione:
Indirizzi per estratti:
Citazione:
P.A. Kenney et al., "GENETIC-PARAMETERS FOR TERMINAL SIRES ESTIMATED USING DATA OF PROGENYFROM BORDER LEICESTER X MERINO EWES", Australian Journal of Agricultural Research, 46(4), 1995, pp. 703-719

Abstract

Three and a half thousand lambs from Border Leicester x Merino ewes mated to 133 sires from five Poll Dorset, one White Suffolk, one Siromt, two Meridale and four Merino studs were slaughtered, their carcasseshalved and one side divided into six primals. Subcutaneous fat was dissected from all six primals, and bone from only the three rear primals. There were four slaughter groups: average slaughter weights of 30 and 35 kg for ewes and 35 and 45 kg for cryptorchids. Heritabilities and phenotypic and genetic correlations for all traits measured (>50) are published in an appendix. Where comparisons were available, estimates were similar to those for purebred animals. Genetic parameters for various assessments of fat were similar except for channel and omental fat. The GR fat depth was the best predictor for total subcutaneous fat, cannon bone length for total bone, and eye muscle area for total soft tissue. Carcass weight and GR appear to be the most important measurements for use in selection for breeding of sires for the prime lamb industry. Slaughter weight and fat depth at the C site could be used as suitable alternatives on live animals. Production of lean meat is not likely to be increased greatly by including measurements other than liveweight and GR in a selection index. Of the other measurements bonelength and eye muscle measurements showed most promise.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 27/09/20 alle ore 21:04:36