Sensitivity of response of multi-trait index selection to changes in genetic correlations between production traits in sheep

Australian Journal of Experimental Agriculture

Volumn 46, Issue 3, 2006, Pages 283-290

  Safari, E ^a   Fogarty, N M ^a   Gilmour, A R ^a  

^a NSW DEPARTMENT OF PRIMARY INDUSTRIES   (Australia)

Author keywords

Breeding objectives; Dual purpose; Genetic correlations; Meat; Wool

Indexed keywords

GENETIC VARIATION; MEAT; SELECTIVE BREEDING; SENSITIVITY ANALYSIS; SHEEP; WOOL;

OVIS ARIES;

EID: 33745664261     PISSN: 08161089     EISSN: None     Source Type: Journal    
DOI: 10.1071/EA04232     Document Type: Article

References (21)

1. Atkins KD (1997) Genetic improvement of wool production. In 'The genetics of sheep'. (Eds LR Piper, A Ruvinsky) pp. 471-504. (CAB International: Wallingford)
2. Banks R (2002) Enhancing the value of meat from wool sheep: Is there a need for specialisation? Wool Technology and Sheep Breeding 50, 584-595.
3. Brown DJ, Ball A, Mortimer R, Oppenheimer M (2002) Incorporating subjectively assessed sheep and wool traits into genetic evaluations for Merino sheep 2: Phenotypic and genetic correlations. Wool Technology and Sheep Breeding 50, 378-382.
4. Eady SJ, Woolaston RR, Barger IA (2003) Comparison of genetic and nongenetic strategies for control of gastrointestinal nematodes of sheep. Livestock Production Science 81, 11-23. doi: 10.1016/S0301-6226(02)00197-5
5. Fogarty NM, Gilmour AR (1993) Sensitivity of breeding objectives to prices and genetic parameters in Australian Corriedale and Polwarth dual-purpose sheep. Australian Journal of Experimental Agriculture 33, 259-268. doi: 10.1071/EA9930259
6. Fogarty NM, McLeod L, Morgan JE (2003a) Variation among crossbred ewes in lamb productivity and profit on a feed unit basis. Proceedings of the Association for the Advancement of Animal Breeding and Genetics 15, 314-317.
7. Fogarty NM, Safari E, Taylor PJ, Murray W (2003b) Genetic parameters for meat quality and carcass traits and their correlation with wool traits in Australian Merino sheep. Australian Journal of Agricultural Research 54, 715-722. doi: 10.1071/AR03047
8. Harris DL (1964) Expected and predicted progress from index selection involving estimates of population parameters. Biometrics 20, 46-72.
9. Hayes JF, Hill WG (1980) A reparameterization of a genetic selection index to locate its sampling properties. Biometrics 36, 237-248.
10. Ihaka RI, Gerileman R (1996) A language for data analysis and graphics. Journal of Comparative Graphical Statistics 5, 299-314.
11. LAMBPLAN (2005) LAMBPLAN. Available at http://www.mla.com.au/lambplan/ (verified 21 February 2006).
12. Mortimer SI, Atkins KD (1993) Genetic evaluation of production traits between and within flocks of Merino sheep 2. Component traits of the hogget fleece. Australian Journal of Agricultural Research 44, 1523-1539. doi: 10.1071/AR9931523
13. Safari A, Fogarty NM (2003) Genetic parameters for sheep production traits: estimates from the literature. NSW Department of Agriculture, Technical Bulletin 49, Orange, NSW
14. Safari E, Fogarty NM, Gilmour AR (2005) A review of genetic parameter estimates for wool, growth, meat and reproduction traits in sheep. Livestock Production Science 92, 271-289. doi: 10.1016/j.livprodsci.2004.09.003
15. Sales J, Hill WG (1976a) Effects of sampling errors on efficiency of selection indexes. 1. Use of information from relatives for single trait improvement. Animal Production 22, 1-7.
16. Sales J, Hill WG (1976b) Effects of sampling errors on efficiency of selection indexes. 2. Use of information on associated traits for improvement of a single important trait. Animal Production 23, 1-14.
17. Semple SJ, Atkins KD, Casey AE (1999) OBJECT Personalised breeding objectives for Merino ram breeders. NSW Agriculture, Orange.
18. Smith C (1983) Effects on changes in economic weights on the efficiency of index selection. Journal of Animal Science 56, 1057-1064.
19. Smith WB, Hocking RR (1972) Algorithm AS53, Wishart variate generator. Applied Statistics 21, 341-345.
20. Williams JS (1962a) The evaluation of a selection index. Biometrics 18, 375-393.
21. Williams JS (1962b) Some statistical properties of a genetic selection index. Biometrika 49, 325-337. 2006