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Sheep with enhanced resistance to parasites did not cause adaptation in Trichostrongylus colubriformis following long-term serial passage

Published online by Cambridge University Press:  23 November 2017

K.E. Kemper ,
R.R. Woolaston ,
R.L. Elwin ,
M.E. Goddard  and
S.C. Bishop
K.E. Kemper*
Affiliation:
University of Melbourne, Melbourne, Victoria, Australia
R.R. Woolaston
Affiliation:
CSIRO Livestock Industries, Armidale, New South Wales, Australia
R.L. Elwin
Affiliation:
CSIRO Livestock Industries, Armidale, New South Wales, Australia
M.E. Goddard
Affiliation:
University of Melbourne, Melbourne, Victoria, Australia
S.C. Bishop
Affiliation:
Roslin Institute, Roslin, Scotland, United Kingdom
*
Email:[email protected]
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Extract

Gastrointestinal parasitism is estimated to cost the British sheep industry £83M per annum and these losses could be reduced by breeding sheep with enhanced resistance to parasites (Nieuwhof and Bishop 2005). However, there is concern that parasites could adapt to more resistant hosts through the increased selection pressure placed on parasite populations. The aim of this study is to evaluate the potential of Trichostrongylus colubriformis to adapt to host genotype following long-term exposure. We hypothesised that T. colubriformis would adapt, as measured by egg output, differentially to hosts selected for either increased (IR) or decreased (DR) parasite resistance following long-term serial passage.

Type
Theatre Presentations
Information
Proceedings of the British Society of Animal Science , Volume 2008 , 2008 , pp. 26
Copyright
Copyright © The British Society of Animal Science 2008

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References

Gilmour, A.R., Gogel, B.J., Cullis, B.R. and Thompson, R. 2006. ASReml user guide 2.0. VSN International Ltd, UK.Google Scholar
Nieuwhof, G.J. and Bishop, S.C. 2005. Proceedings of British Society of Animal Science. 49.Google Scholar
Woolaston, R.R. and Piper, L.R. 1996. Animal Science 62, 451–460.CrossRefGoogle Scholar