Grain qualities between the compact panicle type Japonica rice (CPJR) and the loose panicle type Japonica rice (LPJR) were compared. The results showed that obvious differences of chalkiness among varieties in the two panicle types of rice. The average chalkiness of the two CPJR varieties (lines) was worse than the two LPJR varieties. The chalky grain rate of EA6 with CPJR was about 1/2 that of Xiushui 63 (same CPJR as EA6), similar to Xiushui 11 with LPJR, and about one time higher than Koshihikari (a Japanese variety with LPJR and excellent grain qualities). The chalkiness degree of EA6 was about 1/2 that of Xiushui 63 and Xiushui 11, respectively, and above one time higher than Koshihikari. The chalkiness traits of grains situated different part of panicle showed that actions of the chalkiness were more significant on the total chalkiness of varieties (lines) in the bottom grain than the top and the middle ones within panicle, and that the actions were stronger on CPJR than LPJR. In addition, EA6 also showed significantly or much significantly better all the testing characters except scent than Xiushui 11, and approximate majority testing characters compared with Koshihikari. However, Xiushui 63 with CPJR showed almost similar in all the testing characters to Xiushui 11, and significantly worse ones except scent than Koshihikari. The above results implicated that it was possible for CPJR to reach, even exceed LPJR in grain qualities.