Nucleic Acids Research, Vol 25, Issue 24 5130-5131, Copyright © 1997 by Oxford University Press
W Dioh, D Tharreau and MH Lebrun
RAPD markers are frequently used for positional cloning. However, RAPD
markers often contain repeated sequences which prevent genomic library
screening by hybridisation. We have developed a simple RAPD analysis of
genomic libraries based on the identification of cosmid pools and clones
amplifying the RAPD marker of interest. Our method does not require the
cloning or characterisation of the RAPD marker as it relies on the analysis
of cosmid pools or clones using a simple RAPD protocol. We applied this
strategy using four RAPD markers composed of single copy or repeated
sequences linked to avirulence genes of the rice blast fungus Magnaporthe
grisea . Cosmids containing these RAPD markers were easily and rapidly
identified allowing the construction of physical contigs at these loci.
ARTICLES
RAPD-based screening of genomic libraries for positional cloning
Genetique Moleculaire des Champignons Phytopathogenes, Institut de Genetique et Microbiologie, CNRS-URA 2255, Batiment 400, Universite Paris-Sud, 91405 Orsay, France.
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