Nucleic Acids Research, 2002, Vol. 30, No. 6 e27
© 2002 Oxford University Press
Hierarchical high-throughput SNP genotyping of the human Y chromosome using MALDI-TOF mass spectrometry
1CRC Chromosome Molecular Biology Group, Department of Biochemistry, University of Oxford, South Parks Road, Oxford OX1 3QU, UK and 2Immunohematology Laboratory, Istituto di Medicina Legale, Università Cattolica del S. Cuore, Roma, largo F. Vito 1, Italy
We have established the use of a primer extension/mass spectrometry method (the PinPoint assay) for high-throughput SNP genotyping of the human Y chromosome. 118 markers were used to define 116 haplogroups and typing was organised in a hierarchical fashion. Twenty multiplex PCR/primer extension reactions were set up and each sample could be assigned to a haplogroup with only two to five of these multiplex analyses. A single aliquot of one enzyme was found to be sufficient for both PCR and primer extension. We observed 100% accuracy in blind validation tests. The technique thus provides a reliable, cost-effective and automated method for Y genotyping, and the advantages of using a hierarchical strategy can be applied to any DNA segment lacking recombination.
* To whom correspondence should be addressed. Tel: +44 1865 275222; Fax: +44 1865 275259; Email: chris{at}bioch.ox.ac.uk Present address:Rod Chalk, Oxford GlycoSciences (UK) Ltd, 86 Milton Park, Abingdon, Oxon OX14 4RY, UK
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