杂交水稻2025，Vol.40Issue(5)：13-23,11.DOI:10.16267/j.cnki.1005-3956.20250124.015
高产优良食味类型杂交籼稻的籽粒灌浆特征分析
Grain-filling Characteristics of Indica Hybrid Rice Varieties with High Yield and Good Taste
摘要
Abstract
Field experiments were carried out for three types of indica hybrid rice varieties with high yield and good taste(HYGT),high yield but poor taste(HYPT),and low yield but good taste(LYGT)to investigate their differences in yield and its components,grain quality,and grain-filling characteristics and the correlations of the grain-filling characteristics to yield,yield components and grain quality traits.The results were summarized as follows.(1)Compared with HYPT varieties,HYGT varieties showed no significant difference in average grain yield but significant increases of 10.36％and 15.38％in cooked rice taste and comprehensive score,respectively.Compared with LYGT varieties,HYGT varieties showed a significant increase of 15.70％in average grain yield,but no significant difference in cooked rice taste and comprehensive score.(2)There were significant differences in grain-filling characteristics of superior and inferior grains among different types of indica hybrid rice varieties.HYPT varieties were the synchronous grain-filling type,while HYGT and LYGT varieties were the asynchronous grain-filling type.The final weights of both superior and inferior grains of different types of indica hybrid rice varieties showed the trend of HYPT varieties＞LYGT varieties＞HYGT varieties.(3)The superior and inferior grains of HYGT varieties had lower initial grain-filling potential(R0),lower maximum grain-filling rate(GRmax),lower grain weight at the time of maximum grain-filling rate(Wmax),lower mean grain-filling rate(GR),lower mean grain-filling rates at early,middle,and late grain-filling stages,shorter active grain-filling period(D)and effective grain-filling time(T99),higher proportion of Wmax in final weight,and longer time reaching the maximum grain-filling rate(Tmax)than those of HYPT varieties.(4)The superior and inferior grains of HYGT varieties had higher R0,lower GRmax,Wmax,proportion of Wmax in final weight,and GR,shorter D,and lower mean grain-filling rates at early,middle,and late grain-filling stages than those of LYGT varieties.The inferior grains of HYGT varieties had longer Tmax and T99 than those of LYGT varieties,whereas the superior grains of HYGT varieties had shorter Tmax and T99 than those of LYGT varieties.Correlation analysis showed that R0 of superior and inferior grains was positively correlated with yield,but negatively or significantly negatively correlated with tasting quality traits.In conclusion,HYGT varieties had lower final weights,moderate R0,lower GRmax and GR of superior and inferior grains,a smooth grain-filling process,and shorter T99 of superior grains but moderate T99 of inferior grains.The high yield and good quality were synergistically achieved by higher number of effective panicles,higher total grain number per panicle,and lower amylose content in grains.关键词
杂交籼稻/产量/食味品质/籽粒灌浆Key words
indica hybrid rice/yield/tasting quality/grain filling分类
农业科技引用本文复制引用
蒋明金,李立江,张佳凤,田晋钰,姬广梅,罗丹秋,李敏..高产优良食味类型杂交籼稻的籽粒灌浆特征分析[J].杂交水稻,2025,40(5):13-23,11.基金项目
国家自然科学基金项目(32160505) （32160505）
贵州省基础研究(自然科学)项目(黔科合基础-ZK[2023]一般176,黔科合基础-ZK[2024]重点080) （自然科学）
贵州省高层次创新型人才培养项目(黔科合平台人才-GCC[2023]065) （黔科合平台人才-GCC[2023]065）
贵州省农业科学院国基后补助项目(黔农科院[2022]04号) （黔农科院[2022]04号）
