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Random Amplified Polymorphic DNA markers use a single, short (usually around 10 bases) primer. This amplifies anonymous sequence(s) throughout the genome (Williams et al. 1990). 

Although they are simple to perform, inexpensive, and easy to analyze, their reproducibility is poor and the assay is not codominant (heterozygotes cannot be distinguished from homozygotes). Therefore, RAPDs per se are not well suited for MAB. However, if an informative RAPD marker is identified, it is possible to convert it (as for an AFLP) into a SCAR (see next slide).