@conference {39927,
	title = {Expected selection responses in lamb carcass composition and weight},
	booktitle = {Proceedings of the New Zealand Society of Animal Production},
	volume = {44},
	year = {1984},
	month = {Jan},
	pages = {243-248},
	publisher = {New Zealand Society of Animal Production},
	organization = {New Zealand Society of Animal Production},
	abstract = {Twenty eight Border Leicester 2-tooth rams (mean live weight 70 kg) were scored for fatness on a 10-point scale by 6 drafters and back fat thickness was measured by ultrasonic probe (UFD). Chemical fat percentage (mean 33.9\%) was determined on a half-carcass of each ram. Mean carcass weight, measurement C and GR were 38.0 kg, 12 mm and 28 mm respectively. Mean drafters{\textquoteright} fat score was more highly correlated with \% carcass fat (+0.83) than UFD (+0.67). The prediction of fat-free carcass weight (FFCW) from live weight plus UFD (R2=0.72, RDS 1.24 kg) or drafters{\textquoteright} fat score (R2=0.76, RSD 1.14 kg) was superior to prediction from live weight alone (R@=0.59, RSD 1.49 kg). The inclusion of UFD o9r drafters{\textquoteright} fat score increased the efficiency with which rams were ranked for fat-free carcass weight. Selection of the top 10\% of rams ranked on the prediction of FFCW from live weight achieved 75\% of the potential selection differential. Inclusion of either UFD or drafters{\textquoteright} score improved the potential to 95\%.},
	issn = {1176-5283},
	author = {Bennett GL and Clarke JN}
}
