1. bookVolume 71 (2021): Issue 2 (June 2021)
Journal Details
License
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Journal
First Published
25 Mar 2014
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4 times per year
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English
access type Open Access

Scrapie Resistance Gene Identification using Optimized Taqman Test qPCR Method in Sheep on the Territory of the Republic of Serbia

Published Online: 12 Jul 2021
Page range: 189 - 197
Received: 27 Apr 2021
Accepted: 11 Jun 2021
Journal Details
License
Format
Journal
First Published
25 Mar 2014
Publication timeframe
4 times per year
Languages
English
Abstract

Scrapie is an infectious neurodegenerative disease affecting the central nervous system of sheep and goats that belongs to transmissible spongiform encephalopathies. The disease is caused by the accumulation of proteinase-resistant isoform of the prion protein. The sheep predisposition to scrapie is associated with polymorphisms of the PrP gene. Genetic susceptibility to scrapie is mainly related to codons 136, 154, and 171. ARR sheep are strongly scrapie resistant and VRQ genotype is the most susceptible. Many countries have scrapie eradication programs based on using rams with resistant genotype. The eradication program has not yet been implemented in the Republic of Serbia. To examine the genetic makeup of sheep in Serbia related to scrapie, we optimized TaqMan probes of real-time polymerase chain reaction (qPCR) technique for three codons. Blood samples from 100 sheep were analyzed by qPCR and the majority of the examined sheep were AA homozygous for the 136 codon. For codon 154 the most frequent genotype was RR and for codon 171 the most frequent genotype was QQ.

Keywords

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