%A LI Bo, ZHANG Chi, ZENG Yu-Ling, LI Qiu-Ping, REN Hong-Chao, LU Hui, YANG Fan, CEHN Hong, WANG Li, CHEN Yong, REN Wan-Jun, DENG Fei %T Effects of sowing date on eating quality of indica hybrid rice in Sichuan Basin %0 Journal Article %D 2021 %J Acta Agronomica Sinica %R 10.3724/SP.J.1006.2021.02053 %P 1360-1371 %V 47 %N 7 %U {https://zwxb.chinacrops.org/CN/abstract/article_7140.shtml} %8 2021-07-12 %X

In order to clarify the effects of sowing date on the eating quality of indica hybrid rice, field experiments were conducted in Dayi, Nanbu, and Shehong, Sichuan province, using indica hybrid rice Yixiangyou 2115, F you 498, and Chuanyou 6203 as experimental materials. The effects of sowing dates in different locations on the appearance, taste, comprehensive score, hardness and viscosity of indica hybrid rice were investigated using the rice taste analyzer and the hardness and viscosity analyzer. The results showed as follows: (1) Location, variety, sowing date, and their interaction had significant influences on eating quality of indica hybrid rice. (2) The appearance, taste, and comprehensive score of rice were ranked as Yixiangyou 2115 > Chuanyou 6203 > F you 498 at each sowing date, while F you 498 possessed the highest hardness value, which indicated that the eating quality of Yixiangyou 2115 was obviously greater than others. The appearance, taste and comprehensive score of rice could be improved with appropriate delaying of sowing date at different locations, and then the quality of rice can be improved. (3) The correlation analysis showed that the comprehensive score was significantly and positively associated with the accumulated temperature, but negatively related to the rainfall from sowing stage to heading stage. Comprehensive score also significantly and negatively correlated to the accumulated temperature, sunshine hours from heading stage to maturity stage, as well as the rainfall during the whole growth period. (4) According to GGE model, a higher comprehensive score and stability was observed in Dayi by ten days postponing at sowing date; Whereas, 10 to 20 days delay at sowing date could improve both comprehensive score and stability in Nanbu and Shehong. In conclusion, the delayed sowing date of 10-20 days leaded to a more reasonable temperature and light condition during the grain filling stage of rice in Sichuan basin, thus contributed to the improvement in eating quality of indica hybrid rice by increasing both comprehensive score and stability.