Carcass characteristics of progeny from ram lambs selected for high or low ultrasonic backfat thickness

References

• Bennett , G. L. and Clarke , J. N. Expected selection responses in lamb carcass composition and weight . Proceedings of the New Zealand Society of Animal Production . Vol. 42 , pp. 243 – 247 .
   Google Scholar
• Bennett , G. L. , Meyer , H. H. and Kirton , A. H. 1988 . Effects of selection for divergent ultrasonic fat depth in Tarns on progeny fatness . Animal production , 47 : 379 – 386 .
   Google Scholar
• Black , J. L. Manipulation of body composition through nutrition . Proceedings of the Australian Society of Animal Production . Vol. 10 , pp. 211 – 218 .
   Google Scholar
• Botkin , M. P. , Field , R. A. , Riley , M. L. , Nolan , J. C. and Roehrkasse , G. P. 1969 . Heritability of carcass traits in lambs . Journal of animal science , 29 : 251 – 255 .
   Web of Science ®Google Scholar
• Botkin , M. P. , Riley , M. L. , Field , R. A. , Johnson , C. L. and Roehrkasse , G. P. 1971 . Relationship between productive traits and carcass traits in lambs . Journal of animal science , 32 : 1057 – 1061 .
   Web of Science ®Google Scholar
• Bowman , J. C. and Hendy , C. R. C. 1972 . A study of retail requirements and genetic parameters of carcass quality in Polled Dorset Horn sheep . Animal production , 14 : 189 – 198 .
   Google Scholar
• Bradford , G. E. and Spurlock , G. M. 1972 . Selection for meat production in sheep: results of a progeny test . Journal of animal science , 34 : 737 – 745 .
   Web of Science ®Google Scholar
• Butler-Hogg , B. W. and Cruickshank , G. J. 1989 . “ The effect of environmental factors on growth and development ” . In Meat production and processing , Edited by: Purchas , R. W. , Butler-Hogg , B. W. and Davies , A. S. Vol. 11 , 87 – 101 . New Zealand Society of Animal Production occasional publication . in
   Google Scholar
• Clarke , J. N. , Parratt , A. C. , Malthus , I. C. , Amyes , N. C. , Uljee , A. E. and Woods , E. G. Carcass composition of exotic sheep breeds . Proceedings of the New Zealand Society of Animal Production . Vol. 48 , pp. 53 – 56 .
   Google Scholar
• Cotterill , P. P. and Roberts , E. M. Preliminary heritability estimates of some lamb carcass traits . Proceedings of the Australian Society of Animal Production . Vol. 11 , pp. 53 – 56 .
   Google Scholar
• Fennessy , P. F. , Greer , G. J. and Bain , W. E. Selection to change carcass fatness in sheep . Proceedings of the 4th AAAP Animal Science Congress . pp. 382 – 382 .
   Google Scholar
• Fennessy , P. F. , Greer , G. J. and Bass , J. J. Progeny test of selected lean and fat rams . Proceedings of the New Zealand Society of Animal Production . Vol. 42 , pp. 137 – 140 .
   Google Scholar
• Gooden , J. M. , Beach , A. D. and Purchas , R. W. 1980 . Measurement of subcutaneous backfat depth in live lambs with an ultrasonic probe . New Zealand journal of agricultural research , 23 : 161 – 165 .
   Web of Science ®Google Scholar
• Hill , W. G. 1970 . Design of experiments to estimate heritability by regression of offspring on selected parents . Biometrics , 26 : 566 – 571 .
   PubMed Web of Science ®Google Scholar
• Kadim , I. T. , Purchas , R. W. , Rae , A. L. and Barton , R. A. 1989 . Carcass characteristics of Southdown rams from high and low backfat selection lines . New Zealand journal of agricultural research , 32 : 181 – 191 .
   Web of Science ®Google Scholar
• Kirton , A. H. 1989 . “ Principles of classification and grading ” . In Meat production and processing , Edited by: Purchas , R. W. , Butler-Hogg , B. W. and Davies , A. S. Vol. 11 , 143 – 157 . New Zealand Society of Animal Production occasional publication . in
   Google Scholar
• Kirton , A. H. , Clare , J. N. and Carter , A. H. 1967 . Effect of pre-slaughter fasting on liveweight, carcass weight, and carcass composition of Southdown ram lambs . New Zealand journal of agricultural research , 10 : 43 – 55 .
   Web of Science ®Google Scholar
• Kirton , A. H. and Jury , K. E. Grading of lamb and mutton carcasses . Proceedings of the New Zealand Society of Animal Production . Vol. 30 , pp. 130 – 143 .
   Google Scholar
• Palsson , H. 1939 . Meat qualities in the sheep with special reference to Scottish breeds and crosses . Journal of agricultural science, Cambridge , 29 : 544 – 574 .
   Web of Science ®Google Scholar
• Parratt , A. C. , Burt , C. M. , Bennett , G. L. , Clarke , J. N. , Kirton , A. H. and Rae , A. L. Heritabilities, genetic and phenotypic correlations for carcass traits and ultrasonic fat depth of sheep . Proceedings of the Australian Association of Animal Breeding and Genetics . Vol. 6 , pp. 76 – 78 .
   Google Scholar
• Purchas , R. W. , Rae , A. L. , Barton , R. A. and Beach , A. D. The repeatability of ultrasonic fat-depth measurements made on sheep up to 18 months of age . Proceedings of the New Zealand Society of Animal Production . Vol. 41 , pp. 133 – 139 .
   Google Scholar
• Snedecor , G. W. and Cochran , W. G. 1967 . Statistical methods , 6th ed. , Ames, Iowa : Iowa State University Press. .
   Google Scholar
• Thorsteinsson , S. S. and Bjornsson , H. 1982 . Genetic studies on carcass traits in Iceland twin ram lambs. 1. Estimates of genetic parameters on carcass traits, live weight at weaning and carcass weight . Livestock production science , 8 : 489 – 505 .
   Google Scholar
• Wolf , B. T. , Smith , C. , King , J. W. B. and Nicholson , D. 1981 . Genetic parameters of growth and carcass composition in crossbred lambs . Animal production , 32 : 1 – 7 .
   Google Scholar