@conference {40385,
	title = {A comparison of grain and pasture finishing of heavyweight cattle},
	booktitle = {Proceedings of the New Zealand Society of Animal Production},
	volume = {52},
	year = {1992},
	month = {Jan},
	pages = {93-96},
	publisher = {New Zealand Society of Animal Production},
	organization = {New Zealand Society of Animal Production},
	abstract = {Data for the years 1986 to 1990 from the "Kamo" out-of-season  lambing flock were subjected to analyses to determine the genetic  variation for lambing date. The response variate was date of lambing  (provided the ewe had a chance to mate for an autumn lambing) and this  was transformed to an underlying normal scale by treating it as an  ordered categorical response. Restricted maximum likelihood (REML)  analyses were performed using an animal model. Year of record and age  of ewe were included as fixed effects. There were 870 ewes having a  total of 1967 lambing records. The estimate of heritability for  standardised lambing data was 0.23 and repeatability 0.36 while the  heritability for litter size was 0.03. Preliminary multivariate  analysis indicated that the genetic correlation between standardised  lambing date and litter size to be 0.09.   At the time of disbanding of the flock samples of ewes selected on the  phenotypic response (i.e. number of times lambed in autumn) of the ewe  or of her dam, were brought to Ruakura. In 1991 following a best linear  unbiased prediction (BLUP) analyses these were assigned to Autumn and  Spring lambing flocks on the basis of their breeding value (BV) for  standardised date of lambing. The average BV for the Autumn flock was -  0.13 while that for spring was +0.07 and there was a 26 day difference  in mean lambing date (167 vs 193).  },
	issn = {1176-5283},
	author = {Muir PD and Cruickshank GJ and Smith NB and MacLean KS and Wallace GJ}
}
