Effect of genomic DNA preparation methods on RAPD reproducibility. DNA was extracted by modified IMS-in vitro excystation (A) or the proteinase K-phenol method (B). Lanes: M, 1-kb DNA ladder, with arrowheads indicating bands (from top to bottom) of approximately 3.0, 1.6, 1.0, and 0.5 kb; 1 and 6, CP7265; 2 and 7, CP7278; 3 and 8, CP7284; 4 and 9, CP7375; 5 and 10, CP7380. Primers used were GPD62 (lanes 1 to 5) and GPD63 (lanes 6 to 10).