@conference {41036,
	title = {New Zealand beef industry structure and opportunities to improve income},
	booktitle = {Proceedings of the New Zealand Society of Animal Production},
	volume = {58},
	year = {1998},
	month = {Jan},
	pages = {228-230},
	publisher = {New Zealand Society of Animal Production},
	organization = {New Zealand Society of Animal Production},
	abstract = {As a product, beef can be classified as suiting table or processing requirements. The aim of this study is to quantify the volume and value of table and processing beef arising from herds of beef or dairy origin to identify opportunities for increasing industry revenue from improving table beef harvest relative to processing products. A deterministic model was developed to calculate product flows and income from processing and table beef derived from beef and dairy herds over a 20 year horizon. The dairy herd contributed 52\% of beef, 60\% of processing grade beef and 45\% of total beef income. Processing grade beef comprised 58\% of total product by weight. Beef-breed steers and Holstein-Friesian (F) bulls were the largest contributors of any cattle class to table and processing grade beef and total industry revenue. Improving the harvest of table beef by 1\% from F bulls would increase beef industry revenue by 0.7\%, a similar increase in revenue that could be achieved from beef-breed steers. The relative contribution of beef and dairy origin cattle to beef revenue is insensitive to table beef premiums over processing beef. Any improvement strategy within the beef industry should be considered with dairy-origin beef animals in mind. },
	issn = {1176-5283},
	author = {Charteris PL and Garrick DJ and Morris ST}
}
@conference {40925,
	title = {Sire by finishing environment interactions for carcass and meat quality traits in beef cattle.},
	booktitle = {Proceedings of the New Zealand Society of Animal Production},
	volume = {57},
	year = {1997},
	month = {Jan},
	pages = {192-195},
	publisher = {New Zealand Society of Animal Production},
	organization = {New Zealand Society of Animal Production},
	abstract = {Genotype by environment interactions can result in bulls having different genetic merits applicable to different environments. Beef cattle have traditionally been finished on pasture in New Zealand. The desire to meet perceived market requirements for meat quality has encouraged progeny testing and led to feedlotting. The objectives of this study were to evaluate sires on the basis of performance of their pasture-finished steer progeny, their feedlot-finished steer progeny and to compare the assessments of these sires from offspring in each environment. Fourteen Angus sires had progeny in both environments comprising 54 pasture-finished steers and 148 feedlot-finished steers. Estimated Breeding Values (EBVs) of each sire were obtained separately for eight traits that were measured for both pasture and feedlot progeny. Product-moment correlations between sire EBVs based on pasture-finished progeny and EBVs based on feedlot-finished progeny averaged 0.11 (range -0.16 meat colour to 0.50 subcutaneous fat depth). The expected distributions of these correlations between EBVs were obtained by simulation for a range of null hypotheses determined by the true genetic correlation between performance in the two environments using Monte Carlo simulation. The expected distributions of correlations between environments were determined for differing numbers of progeny per sire and for the effect of preselecting prior to entering the progeny test. The distributions of correlations were used to determine whether the low observed correlations between EBVs estimated from each environment were likely to have arisen from chance sampling or were truly indicative of genotype by environment interaction. Based on actual progeny numbers per sire in each environment there were significant (P=0.05) sire by finishing environment interactions for most traits analysed. Increasing the number of progeny per sire would increase the chance of detecting such interactions, in that case separate progeny testing programmes for each environment may be necessary. },
	issn = {1176-5283},
	author = {Charteris PL and Garrick DJ and Morris ST}
}
@conference {40866,
	title = {Characterisation of beef cattle breeding industry structure},
	booktitle = {Proceedings of the New Zealand Society of Animal Production},
	volume = {56},
	year = {1996},
	month = {Jan},
	pages = {386-389},
	publisher = {New Zealand Society of Animal Production},
	organization = {New Zealand Society of Animal Production},
	abstract = {The structure of the beef cattle industry, from a breeding viewpoint is  characterised by registered herds from which bulls are sold to: other  registered breeders, commercial beef cattle farmers and dairy farmers. This  project characterised New Zealand},
	issn = {1176-5283},
	author = {Charteris PL and Garrick DJ}
}
@conference {40734,
	title = {Selection for beef quality traits},
	booktitle = {Proceedings of the New Zealand Society of Animal Production},
	volume = {55},
	year = {1995},
	month = {Jan},
	pages = {275-277},
	publisher = {New Zealand Society of Animal Production},
	organization = {New Zealand Society of Animal Production},
	abstract = {Records on 24 146 Angus and 5 632 Hereford carcasses processed at  Manawatu Beef Packers between March 1993 and August 1994 which had  been evaluated for beef marbling standard (BMS), beef fat standard (BFS)  and beef colour standard (BCS) were used to derive overall meat quality  score. Overall meat quality score in the Japanese grading system is  determined by the lowest grade from: semi-objective assessment for BMS,  BFS and BCS; and subjective assessment for meat brightness, firmness and  texture, fat lustre and quality. Subjective measures of meat and fat quality  are not routinely recorded at this plant and therefore overall meat quality  score could only account for the three recorded items. The majority of  Angus and Hereford carcasses (84.0 and 82.9\%) had an overall meat quality  score of 1 (inferior) and no carcasses had score 5 (excellent). This study  reports the effects of selection to improve Japanese overall meat quality  score by single trait improvement of the three meat quality attributes. A  change of one grade in BMS (or BFS) for Angus carcasses decreased the  proportion of score 1 carcasses to 12.8\% (or 74.7\%) and improved overall  meat quality score from an average of 1.17 to 1.96 (or 1.29). A change of  one grade in BMS (or BFS) for Hereford carcasses decreased the proportion  of score 1 carcasses to 16.1\% (or 66.8\%) and changed overall meat quality  score from an average of 1.18 to 1.90 (or 1.35).   Selection based on a well-designed progeny test would take 5 (or 9) years to  improve BMS (or BFS) by one grade. Biological factors introduce a lag of at  least six years from the start of test matings until there can be widespread  harvest of beef animals with improved meat quality. Selection for BMS can  improve overall meat quality score more effectively and more rapidly than  selection for other meat quality traits.  },
	issn = {1176-5283},
	author = {Charteris PL and Garrick DJ and Morris ST and Wright LA}
}
