Genotyping method for use in cattle traceability and means thereof
The invention discloses means and methods for genotyping an individual head of cattle. Individual\'s DNA is genotyped utilizing the herein defined PCR SNaP-shot protocol. The protocol comprises two PCR steps where the first step (PCR1) includes adding primers (SEQ ID No. 1-30) and/or primers extended at their 5\' end with a common 10 base motif (ACGTTGGATG) to the PCR1 reaction. The second step (PCR2) includes adding extension primers (SEQ ID No. 31-45), and/or primers adjacent to corresponding specific SNPs. Further steps include producing amplicons from a PCR1 mixture comprising template DNA and the first primer set to yield PCR1 products, using PCR1 products as templates to a set of extension primers to yield PCR2 products. Size and color separation is achieved by adding tails of different lengths to the PCR2 primers. PCR2 products are separated and the results compared with SNP profiles from the databank to obtain matching.
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