The control of parasites is mainly based on the use of acaricides. Resistance to acaricides is a major problem associated with parasite control. Host genetic resistance to parasites has been increasingly used as a complementary control strategy and it has been documented in the tropics for both small and large ruminants. Results from several quantitative trait loci studies on parasite resistance have not always been consistent, mainly due to the different factors such as parasites studied, parasite loads, breeds, ages, climates, natural infections versus artificial challenges and infection level at sampling periods, among others. The use of genetic markers in genome-wide studies offers the potential to identify loci or regions associated with nematode resistance, as well as understand the mechanisms underlying resistance. This can be incorporated in breeding schemes and has the potential of reducing levels of infection and improving livestock productivity. Keywords: parasite resistance, genetic markers, goats, sheep, cattle

Plaxedis Ivy Zvinorova, Nick Jonsson, Kennedy Dzama

Proceedings of the World Congress on Genetics Applied to Livestock Production, Volume Electronic Poster Session - Biology - Disease Resistance 2, , 420, 2018
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