A total of 288 accessions of rice were evaluated in the study. The results suggested that germplasm resources from upland showed relatively bigger volume of biomass in general. But some lowland rice also showed big volume of biomass in maturity stage. There were no significant differences between two rice germplasm resources in seed set rate of panicles in drought conditions. The correlation between biomass and seed set rate was 0.0578,which was not significant difference, indicating that the germplasm with big biomass may not possess high seed set.