Show simple item record

dc.contributor.authorDrennan, Michael J*
dc.contributor.authorMcGee, Mark*
dc.date.accessioned2014-07-24T13:27:24Z
dc.date.available2014-07-24T13:27:24Z
dc.date.issued2008
dc.identifier.citationM.J. Drennan and M. McGee. Effect of beef sire expected progeny difference for carcass conformation on live animal muscularity scores and ultrasonic muscle and fat depths, and on carcass classification and composition of their progeny. Irish Journal of Agricultural and Food Research 47: 161–170, 2008en_GB
dc.identifier.issn0791-6833
dc.identifier.urihttp://hdl.handle.net/11019/635
dc.descriptionpeer-revieweden_GB
dc.description.abstractThe objective was to examine the effect of sire expected progeny difference (EPD) for carcass conformation score on the live animal and carcass traits of their progeny. In each of 4 years a Charolais sire of high and one of average EPD for carcass conformation score were mated to spring-calving suckler cows and the bull and heifer progeny were taken to slaughter at 455 (s.d. 25.2) and 607 (s.d. 29.5) days of age in 4 and 3 years, respectively. The difference in EPD between the sire EPD groups for carcass conformation and fat scores (scale 1 to 15), and carcass weight were, 0.45 units, −0.53 units and 9.7 kg, respectively. Muscularity scores were recorded at weaning (7 to 9 months of age) and pre-slaughter, and ultrasound measurements were recorded pre-slaughter. Carcass weight, and conformation and fat scores were recorded at slaughter and an 8-rib pistola from the right side of each carcass was dissected into lean, fat and bone. There was no significant effect of sire EPD group on live weight or carcass weight, but kill-out proportion, ultrasound muscle depth and the Irish Cattle Breeding Federation muscularity scores were greater (P < 0.001) for progeny of the high than the average EPD group. Bull progeny of high EPD sires had better (P < 0.001) Signet muscularity scores and carcass conformation scores than bull progeny from average EPD sires, whereas there was no effect of sire EPD group on heifer progeny. Compared to progeny of the average EPD sire group, those from the high EPD group had a lower weight of kidney and channel fat (P 0.06) and carcass fat score (P < 0.05), lower proportions of fat (P < 0.001) and bone (P < 0.01) in the pistola, and higher weight of pistola, both absolutely (P < 0.01) and relative to carcass weight (P < 0.05), higher proportions of lean and high-value cuts in the pistola and higher carcass value (P < 0.001). Linear regression analysis showed that a 1 unit increase in sire EPD for carcass conformation score increased (P < 0.01) carcass lean proportion by 19.4 g/kg. In conclusion, although sire EPD for carcass conformation score was reflected in the conformation score of intensively-reared bull progeny and not in extensively-reared heifer progeny, carcass lean proportion and carcass value were higher for both genders.en_GB
dc.languageEnglish
dc.language.isoenen_GB
dc.publisherTeagasc, Oak Park, Carlow, Irelanden_GB
dc.relation.ispartofseriesIrish Journal of Agricultural and Food Research;vol 47
dc.subjectBeef sireen_GB
dc.subjectCarcass conformationen_GB
dc.subjectCarcass traitsen_GB
dc.subjectExpected progeny differenceen_GB
dc.titleEffect of beef sire expected progeny difference for carcass conformation on live animal muscularity scores and ultrasonic muscle and fat depths, and on carcass classification and composition of their progenyen_GB
dc.typeArticleen_GB
dc.identifier.rmisGEBE-0201-4936
refterms.dateFOA2018-01-12T08:03:21Z


Files in this item

Thumbnail
Name:
effect of beef sire.pdf
Size:
60.41Kb
Format:
PDF

This item appears in the following Collection(s)

  • IJAFR volume 47, 2008 [18]
    Irish Journal of Agricultural and Food Research, volume 47, 2008
  • Livestock Systems [315]
    Teagasc LIvestock Systems Department includes Dairy, Cattle and Sheep research.

Show simple item record