These new breeding and selection strategies
rely on the availability of cheap and reliable
marker systems. A serious limitation in marker
application for some species has been the paucity
of useful markers. However, the new sequencing
platforms have allowed large-scale discovery of
single-nucleotide polymorphisms (SNPs) for spe-
cies where few markers were previously available.
The new marker systems combined with the new
marker-based selection and screening strategies provide a base for a revolution in crop breeding
and genetics.