Direct and correlated responses to selection for high or low faecal nematode egg count in Perendale sheep

New Zealand Journal of Agricultural Research

Volumn 48, Issue 1, 2005, Pages 1-10

  Morris, C A ^a   Wheeler, M ^a   Watson, T G ^a   Hosking, B C ^a   Leathwick, D M ^a  

^a RUAKURA RESEARCH CENTRE   (New Zealand)

Author keywords

Faecal egg count; Internal parasite; Selection; Sheep

Indexed keywords

FECES; HOST-PARASITE INTERACTION; NEMATODE; SHEEP;

ANIMALIA; HAEMONCHUS CONTORTUS; OVIS; OVIS ARIES;

EID: 18744391142     PISSN: 00288233     EISSN: 11758775     Source Type: Journal    
DOI: 10.1080/00288233.2005.9513625     Document Type: Article

References (26)

1. Bishop, SC, and Stear, MJ. 1999. Genetic and epidemiological relationships between productivity and disease resistance:gastro-intestinal parasite infection in growing lambs. Animal Science, 69:515–524.
2. Bisset, SA, Vlassoff, A, and West, CJ. 1997. Epidemiology of nematodosis in lambs selectively bred for genetic resistance or susceptibility to nematode infection. Veterinary Parasitology, 70:255–269.
3. Bisset, SA, Morris, CA, McEwan, JC, and Vlassoff, A. 2001a. Breeding sheep in New Zealand that are less reliant on anthelmintics to maintain health and productivity. New Zealand Veterinary Journal, 49:236–246.
4. Bisset, SA, van Wyk, JA, Bath, GF, Morris, CA, Stenson, MO, and Malan, FS. Phenotypic and genetic relationships amongst FAMACHA score, faecal egg count and performance data in Merino sheep exposed to Haemonchus contortus infection in South Africa. Proceedings of the 5th International Sheep Veterinary Congress. Capetown.
5. Eady, SJ, Woolaston, RR, Lewer, RP, Raadsma, HW, Swan, AA, and Ponzoni, RW. 1998. Resistance to nematode parasites in Merino sheep:correlation with production traits. Australian Journal of Agricultural Research, 49:1201–1211.
6. Gilmour, AR. 1997. ASREML for testing fixed effects and estimating multiple trait variance components. Proceedings of the Association for the Advancement of Animal Breeding and Genetics, 12:386–390.
7. Gruner, L, Cortet, J, Sauve, C, Limouzin, C, and Brunel, JC. 2002. Evolution of nematode community in grazing sheep selected for resistance and susceptibility to Teladorsagia circumcincta and Trichostrongylus colubriformis:a 4-year experiment. Veterinary Parasitology, 109:277–291.
8. Howse, SW, Blair, HT, Garrick, DJ, and Pomroy, WE. 1992. A comparison of internal parasitism in fleece weight-selected and control Romney sheep. Proceedings of the New Zealand Society of Animal Production, 52:57–60.
9. Karlsson, LJE, and Greef, 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 (Abstr.)
10. Leathwick, DM, Pomroy, WE, and Heath, ACG. 2001. Anthel-mintic resistance in New Zealand. New Zealand Veterinary Journal, 49:227–235.
11. McEwan, JC, Mason, P, Baker, RL, Clarke, JN, Hickey, SM, and Turner, K. 1992. Effects of selection for productive traits on internal parasite resistance in sheep. Proceedings of the New Zealand Society of Animal Production, 52:53–56.
12. McEwan, JC, Bisset, SA, and Morris, CA. The selection of sheep for natural resistance to internal parasites. Proceedings of an Animal Industries Workshop. June1997. Sustainable control of internal parasites in ruminants, Edited by:Barrell, G. K., pp. 161–182. New Zealand:Lincoln University.
13. Morris, CA, Watson, TG, Baker, RL, Hurford, AP, and Hosking, BC. 1993. Repeatability estimates and selection flock effects for faecal nematode egg counts in Romney breeding ewes. Proceedings of the New Zealand Society of Animal Production, 53:227–229.
14. Morris, CA, Clarke, JN, Watson, TG, Wrigglesworth, AL, and Dobbie, JL. 1996. Faecal egg count and food intake comparisons of Romney single-trait selection and control lines. New Zealand Journal of Agricultural Research, 39:371–378.
15. Morris, CA, Vlassoff, A, Bisset, SA, Baker, RL, West, CJ, and Hurford, AP. 1997a. Responses of Romney sheep to selection for resistance or susceptibility to nematode infection. Animal Science, 64:319–329.
16. Morris, CA, Bisset, SA, Vlassoff, A, Baker, RL, Watson, TG, and Wheeler, M. 1997b. Yearling and ewe fleece weights in Romney and Perendale flocks selected for divergence in faecal nematode egg count. Proceedings of the Association for the Advancement of Animal Breeding and Genetics, 12:50–53.
17. Morris, CA, Bisset, SA, Vlassoff, A, West, CJ, and Wheeler, M. 1998. Faecal nematode egg counts in lactating ewes from Romney flocks selectively bred for divergence in lamb faecal egg count. Animal Science, 67:283–288.
18. Morris, CA, Vlassoff, A, Bisset, SA, Baker, RL, Watson, TG, West, CJ, and Wheeler, M. 2000. Continued selection of Romney sheep for resistance or susceptibility to nematode infection:estimates of direct and correlated responses. Animal Science, 70:17–27.
19. Nieuwhof, GJ, and Evans, JL. Inclusions of selection for nematode resistance in British sheep reference schemes. Meeting of the Sub-Network on Genetic Resources of the FAO-CIHEAM Inter-Regional Cooperative Research and Development Network on Sheep and Goats. May9–112002, Sassari, Italy. Breeding programmes for improving the quality and safety of products. New traits, tools, rules and organization? Zaragoza:CIHEAM-IAMZ, (Options Méditerranéennes:Série A. Séminaires Méditerranéens; n. 55), Edited by:Gabiña, D, and Sanna, S. pp. 47–53.
20. SAS. 1995. JMP Version 3, Cary, NC, USA:SAS Institute.
21. Watson, TG, Hosking, BC, Hurford, AP, and Mather, BC. 1992. Developments in breeding Perendale sheep for resistance or susceptibility to internal nematode parasites. Proceedings of the New Zealand Society of Animal Production, 52:61–64.
22. Whitlock, HV. 1948. Some modifications of the McMaster helminth egg-counting technique and apparatus. Journal of the Council for Scientific and Industrial Research, 21:177–180.
23. Williamson, JF, Blair, HT, Garrick, DJ, Pomroy, WE, Douch, PGC, Green, RS, and Simpson, HV. 1995. Parasitism and production in fleece-weight-selected and control sheep. New Zealand Journal of Agricultural Research, 38:381–387.
24. Woolaston, RR. 1992. Selection of Merino sheep for increased or decreased resistance to Haemonchus contortus:peri-parturient effects on faecal egg counts. International Journal for Parasitology, 22:947–953.
25. Woolaston, RR, and Piper, LR. 1996. Selection of Merino sheep for resistance to Haemonchus contortus:genetic variation. Animal Science, 62:451–460.
26. Woolaston, RR, and Windon, RG. 2001. Selection of sheep for response to Trichostrongylus colubriformis larvae:genetic parameters. Animal Science, 73:41–48.