The mapping population consists of 106 of the 135 doubled haploid lines derived via anther culture from an inter-subspecific cross between indica cultivar IR64 and tropical japonica cultivar Azucena (Guiderdoni et al, 1992). Compared to the initial map from Huang et al (1995), it includes 349 markers distributed as follow: 233 markers from a previous map based on data obtained at IRRI, IRD and CIRAD, 131 markers mapped by Cirad and IRD in the framework of the EGRAM programme (European Comparative Gramineae Mapping Programme), and 7 RGA mapped by Cirad. The repartition of the markers by species is as follow: 214 rice markers, 14 rice isozymes, 16 rice RAPDs, 35 maize markers, 38 sorghum markers, 25 oat markers, 6 barley markers, 4 wheat markers, 3 sugarcane markers, and 3 from unknown origin. The EGRAM marker and map data for this population are kindly provided by O. Garsmeur (Cirad), L. Grivet (Cirad) and M. Lorieux (IRD). The RGA markers were added by O. Garsmeur, C. Sallaud, R. Berruyer D. and Tharreau (Cirad). This dataset was kindly provided by Dr. D. Tharreau.