Short interspersed elements (SINEs) are retrotransposons that make their copies by the retroposition of RNA made by RNA polymerase III (Motohashi et al 1997). These are generally found in animals and plants. Umeda et al (1991) and Mochizuki et al (1993) reported the existence of the p-SINE1 family in rice. Furthermore, Hirano et al (1994) reported that the p-SINE-r2, a member of the SINE family, is found only in two closely related species with the AA genome, Oryza sativa and O.rufipogon. This element is located in the 10th intron of the Waxy gene (Umeda et al 1991). Mochizuki et al (1993) suggested that p-SINE1-r2 could be useful for classifying various rice strains with the AA genome.