Total RNA from the rice during pathogen infection was extracted with Trizol Reagent according to the manufacturer’s recommended instructions (Invitrogen, Brazil). Total RNA was reversely transcribed using M-MLV Reverse Transcriptase (Invitrogen, Brazil) according to the manufacturer’s instructions. First-strand cDNA was generated using an oligo(dT)15 primer, and used as a template in subsequent cDNA-RAPD technique [18]. Polymorphism bands of cDNA-RAPD fingerprints which presented differences in the rice mutant samples from that of the control KDML 105 were subcloned into pGEM-T easy vector (Promega,USA) and transformed into competent Escherichia coli (E. coli) DH5-a cells. These fragments were then sequenced (at The First BASE Laboratories, Malaysia) and the encoded protein sequences were
aligned to all sequences available in the GenBank database using BLASTp algorithms (http://www.ncbi.nlm.mih.gov/blast).