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2008 (English)In: Nature Protocols, ISSN 1754-2189, E-ISSN 1750-2799, Vol. 3, no 11, p. 1751-1765Article in journal (Refereed) Published
Abstract [en]
Positional cloning of chemically induced mutations is the rate-limiting step in forward genetic screens in Drosophila. Single-nucleotide polymorphisms (SNPs) are useful markers to locate a mutated region in the genome. Here, we provide a protocol for high-throughput, high-resolution SNP mapping that enables rapid and cost-effective positional cloning in Drosophila. In stage 1 of the protocol, we use highly multiplexed tag-array mini-sequencing assays to map mutations to an interval of 1-2 Mb. In these assays, SNPs are genotyped by primer extension using fluorescently labeled dideoxy-nucleotides. Fluorescent primers are captured and detected on a microarray. In stage 2, we selectively isolate recombinants within the identified 1-2 Mb interval for fine mapping of mutations to about 50 kb. We have previously demonstrated the applicability of this protocol by mapping 14 muscle morphogenesis mutants within 4 months, which represents a significant acceleration compared with other commonly used mapping strategies that may take years.
National Category
Medical and Health Sciences
Identifiers
urn:nbn:se:uu:diva-98390 (URN)10.1038/nprot.2008.175 (DOI)000265781600008 ()18948975 (PubMedID)
2009-02-202009-02-202022-01-28Bibliographically approved