Selection response in fecal worm egg counts in the Rylington Merino parasite resistant flock

Australian Journal of Experimental Agriculture

Volumn 46, Issue 6-7, 2006, Pages 809-811

  Karlsson, L J E ^a   Greeff, J C ^a  

^a Department of Agriculture and Food WA ^*  (Australia)

Author keywords

[No Author keywords available]

Indexed keywords

GENETIC VARIATION; LIVESTOCK FARMING; PARASITE RESISTANCE; REPRODUCTIVE STRATEGY; SELECTIVE BREEDING; SHEEP;

ANIMALIA;

EID: 33745419396     PISSN: 08161089     EISSN: None     Source Type: Journal    
DOI: 10.1071/EA05367     Document Type: Conference Paper

References (21)

1. Albers GAA, Gray GD, Piper LR, Barker JSF, Le Jambre LF, Barger IA (1987) The genetics of resistance and resilience to Haemonchus contortus infection in young Merino sheep. International Journal for Parasitology 17, 1355-1363. doi: 10.1016/0020-7519 (87)90103-2
2. Arnold GW, de Boer ES, Charlick AJ (1982) Natural selection in flocks of Merino and Dorset horn sheep. In 'Proceedings of the world congress on sheep and cattle breeding'. (Eds RA Barton, WC Smith) pp. 441-445. (The Dunmore Press Ltd: Palmerston North)
3. Edwards JR, Wroth R, De Chaneet GC, Besier RB, Karlsson J, Morcombe PW, Dalton-Morgan G, Roberts D (1986) Survey of anthelmintic resistance in Western Australian sheep flocks. 1. Prevalence. Australian Veterinary Journal 63, 135-138.
4. Greeff JC, Karlsson LJE (1998) The genetic relationship between faecal consistency, faecal worm egg count and wool traits in Merino sheep. In 'Proceedings of the 6th world congress on genetics applied to livestock production. Vol. 24'. pp. 63-66.
5. Greeff JC, Karlsson LJE, Harris JF (1995) Heritability of faecal worm egg count at different times of the year in a Mediterranean environment. In 'Proceedings of the 11th congress of the Australian Association of Animal Breeding', p. 117.
6. Greeff JC, Karlsson LJE, Besier B (1999) Breeding sheep for resistance to internal parasites. CRC for Premium Quality Wool Industry Symposium. In 'Proceedings of the Association of Advancement of Animal Breeding and Genetics. Vol. 13'. pp. 150-153.
7. Groeneveld E (1990) 'PEST User's manual.' (Institute of Animal Husbandry and Animal Behaviour, Federal Agricultural Research Centre: Neustadt, Germany)
8. Karlsson LJE (1999) Sustainable sheep ectoparasite control using IPM. In 'Proceedings of the Australian Sheep Veterinary Association conference'. (Ed. B Besier) pp. 128-133.
9. Karlsson LJE, Greeff JC (1996) Preliminary genetic parameters of fecal worm egg count and scouring traits in Merino sheep selected for low worm egg count in a Mediterranean environment. Proceedings of the Australian Society of Animal Production 21, 477.
10. Karlsson LJE, Greeff JC (1997) Selecting merino sheep for genetic resistance to gastro-intestinal nematodes in a Mediterranean environment. In 'Proceedings of the IV international sheep veterinary congress'. (Eds B Allworth, K Abbott) pp. 346-349.
11. Karlsson LJE, Greeff JC (2001) Response to selection for resistance to sheep nematodes. In 'Proceedings of the V international sheep veterinary congress'. pp. 170-171.
12. Karlsson LJE, Greeff JC (2005) Sustainable internal parasite control in Australian Merino sheep. In 'Proceedings of the 56th annual EAAP meeting'. p. 377.
13. Karlsson LJE, MacLeod IM, Leelawardana DH, Sissoev K, Simmons J (1991) Selection for nematode resistance in sheep in the Australian Mediterranean climatic zone. In 'Breeding for disease resistance in sheep'. (Eds GD Gray, RR Woollaston) pp. 131-138. (Australian Wool Corporation: Melbourne)
14. Karlsson LJE, Pollott GE, Eady SJ, Greeff JC (2004) Relationship between fecal worm egg count and scouring in Australian Merino sheep. Proceeding of the Australian Society of Animal Production 25, 100-103.
15. Karlsson LJE, Greeff JC, Eady SJ, Pollott GE (2005) Nematode resistance and hypersensitivity diarrhoea. In 'Proceedings of the VI international sheep veterinary congress'. pp. 203-204.
16. Palmer DP, Besier RB, Lyon J (2000) Anthelmintic resistance in Western Australia: a point of crisis? In 'Proceedings of the Australian Sheep Veterinary Society'. pp. 124-131.
17. Piper LR (1987) Genetic variation in resistance to internal parasites. In 'Merino improvement programs in Australia'. (Ed. BJ McGuirk) pp. 351-363. (Australian Wool Corporation: Melbourne)
18. Pollott GE, Karlsson LJE, Eady SJ, Greeff JC (2004) Genetic parameters for indicators of host resistance to parasites from weaning to hogget age in Merino sheep. Journal of Animal Science 82, 2852-2864.
19. Windon RG, Dineen JK (1981) The effect of selecting both sire and dam on the response of F1 generation lambs to vaccination with irradiated Trichostrongylus colubriformis larvae. International Journal for Parasitology 11, 11-18. doi: 10.1016/0020-7519(81)90020-5
20. Woolaston RR, Piper LP (1996) Selection of Merino sheep forresistance to Haemonchus contortus: genetic variation Animal Science 62, 451-460.
21. van Wyk J (2001) Refugia - overlooked as perhaps the most potent factor concerning the development of anthelmintic resistance. Onderstepoort Journal of Veterinary Research 68, 55-67.