1. A method for identifying genetic mutations in a test genome of an organism relative to a reference genome of the an organism, the method comprising the steps of: a) hybridizing the reference genome and the test genome in separate hybridization reactions to a genomic tiling array that comprises a plurality of probes that tile the reference genome across a plurality of regions having a stagger of more than one nucleotide to produce a reference intensity pattern and a test intensity pattern; b) identifying in the plurality of regions a subset of regions of possible genetic mutation in the test genome in which the test intensity pattern differs from the reference intensity pattern; and c) resequencing the subset of regions of possible genetic mutation in the test genome on a resequencing array.