Abstract: The invention discloses means and methods for genotyping an individual head of cattle. Individual's DNA is genotyped utilising the herein defined PCR SNaPshot 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 colour 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.

Abstract: 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.

Abstract: The invention discloses means and methods for genotyping an individual head of cattle. Individual's DNA is genotyped utilising 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 colour 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.

Abstract: A quantitative trait locus (QTL) affecting milk fat and protein concentration was localized to a 4cM confidence interval on chromosome 6 centered on the microsatellite BM143. The genes and sequence variation in this region were characterized, and common haplotypes spanning five polymorphic sites in the genes IBSP, SPP1, PKD2, and ABCG2 for two sires heterozygous for this QTL were localized. Expression of SPP1 and ABCG2 in the bovine mammary gland increased from parturition through lactation. SPP1 was sequenced, and all the coding exons of ABCG2 and PKD2 were sequenced for these two sires. The single nucleotide change capable of encoding a substitution of tyrosine-581 to serine (Y581S) in the ABCG2 transporter was the only polymorphism corresponding to the segregation status of all three heterozygous and 15 homozygous sires for the QTL in the Israeli and US Holstein populations.

Abstract: A quantitative trait locus (QTL) affecting milk fat and protein concentration was localized to a 4cM confidence interval on chromosome 6 centered on the microsatellite BM143. The genes and sequence variation in this region were characterized, and common haplotypes spanning five polymorphic sites in the genes IBSP, SPP1, PKD2, and ABCG2 for two sires heterozygous for this QTL were localized. Expression of SPP1 and ABCG2 in the bovine mammary gland increased from parturition through lactation. SPP1 was sequenced, and all the coding exons of ABCG2 and PKD2 were sequenced for these two sires. The single nucleotide change capable of encoding a substitution of tyrosine-581 to serine (Y581S) in the ABCG2 transporter was the only polymorphism corresponding to the segregation status of all three heterozygous and 15 homozygous sires for the QTL in the Israeli and US Holstein populations.