Scrapie - Advisory Notes for Farmers (PB9446)

NSP genotypes table

Genotype result

NSP Type Degree of resistance/susceptibility
ARR / ARR

1

Sheep that are genetically most resistant to scrapie.

ARR / AHQ
ARR / ARH
ARR / ARQ

2

Sheep that are genetically resistant to scrapie, but will need careful selection when used for  further breeding.
AHQ / AHQ
AHQ / ARH
AHQ / ARQ

3

Sheep that genetically have little resistance to scrapie.
Sale and breeding restrictions apply in NSP flocks, ARH / ARH which are breed specific.
ARR / VRQ

4

Sheep that are genetically susceptible to scrapie and should not be used for breeding unless in the context of an approved and controlled breeding programme.
AHQ / VRQ
ARH / VRQ
ARQ / VRQ
VRQ / VRQ

5

Sheep that are highly susceptible to scrapie and should not be used for breeding.

Current science indicates that as a result of the NSP we should, in due course, see a very significant reduction in the incidence of scrapie and eventually its disappearance from the national flock. It is hoped that as many eligible breeders as possible will want to play their part in the NSP.

All genotyping, electronic identification and certification are free in NSP flocks. For the foreseeable future it is likely that NSP certified resistant rams may realise higher prices at some breed sales.

European Commission Decision 2003/100 EC requires Member States to introduce genotype based sheep breeding programmes for resistance to Transmissible Spongiform Encephalopathies (TSEs), including scrapie, on a compulsory basis from 1 April 2005.

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