Using the percentage of gaping glume (PGG) as an index, thirteen accessions of high resistance and high susceptible PGG rice resources were selected from 1017 varieties preserved by the Insititute of Rice Research, Anhui Academy of Agricultural Sciences. With the selected varieties(lines), the broad heretability (h 2) was estimated to be 94 8%. The results of pure line selection, different sowing dates and different fertilizer experiments indicated that the character of glume gaping resistance in rice varieties is stable and heritable, and the environmental factors have no effects on its expression.