TITLE:
Characteristics of Grain Filling and Starch Accumulation of Brewing Functional Indica Rice in Southern Sichuan Eco-Region
AUTHORS:
Hui Wu, Congying Zeng, Zhongyun Zhang, Daju Wu, Wei Dai, Hongyu Liu, Haifang Dai
KEYWORDS:
Brewing Function, Indica Rice, Yield, Ecological Adaptability, Grain-Filling, Starch
JOURNAL NAME:
Open Access Library Journal,
Vol.9 No.5,
May
24,
2022
ABSTRACT: In order to study the ecological adaptability of brewing functional Indica rice varieties in the ecological area of southern Sichuan, six Indica hybrid rice varieties were used as experimental materials to analyze the differences in the rice growth period, yield and yield components, grain filling characteristics, starch and soluble sugar accumulation dynamics under the ecological conditions of southern Sichuan. The results showed that there were significant differences in yield formation, grain filling and starch accumulation among varieties under the same ecological conditions. Affected by the climate in the ecological area of southern Sichuan, the time when CGY6684, GY900 and FY1 reached the maximum grain filling rate moved forward, while GY188, CY6203 and YXY2115 moved backward. At the same time, the high peak value of YXY2115 and GY900 grain filling rate was the highest, while the peak value of CY6203 grain filling rate was the lowest. The peak value of grain starch accumulation of YXY2115 was much higher than that of other varieties, with an increase of 44.07% - 109.71%. At maturity, the order of grain starch content from high to low was YXY2115 > CY6203 > FY1 > GY900 > GY188 > CGY6684. The 1000 grain weight of YXY2115 was significantly higher than that of other varieties, but its grains per panicle and panicles per unit area were lower, resulting in a slightly lower yield than other varieties. On the premise that the number of grains per panicle is genetically determined, in order to improve its yield, we can further improve the number of panicles per unit area through cultivation measures.