Abstract
Genotyping methods based on nonradioactive detection of PCR products and suitable for large-scale mapping projects are described. Two alternative techniques are proposed for the genotyping of polymorphic short tandem repeats or microsatellite markers. The first is designed for investigators who do not have access to automatic sequencing machines. This technique uses multiplex analysis of PCR products that are separated on sequencing gels, transferred to nylon membranes, and detected by hybridization with nonradioactive probes. The second technique uses automatic sequencing machines for the detection of fluorescently labeled PCR products. Another method describes the analysis of nonpolymorphic markers in whole-genome radiation hybrids. This method uses separation and detection of PCR products on agarose gels.
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