Abstract
One of the major challenges of using genetic information in marker assisted selection (MAS) is the detection of multiple marker loci from a small biopsy sample of a preimplantation stage embryo. The objective of this study was to develop a fast, nested, multiplex preamplification, polymerase chain reaction (PCR) method for the determination of sex in bovine embryo blastomeres. For this aim, ZFX/ZFY sequences were preamplified simultaneously with other genomic regions. The preamplification product was used as a template in an allelic discrimination assay, with nested primers and sex specific fluorogenic probes for ZFX and ZFY. Fluorogenic probes were used to eliminate the need for time consuming electrophoresis. Compared to sexing with Bovy/κ-casein co-amplification method and other replicates from the same embryo, the accuracy of sexing with the use of fluorogenic probes after preamplification was 99% (112/113 blastomeres). The amplification efficiency was 96% (113/117 blastomeres).
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