福建农业学报2025，Vol.40Issue(3)：262-270,9.DOI:10.19303/j.issn.1008-0384.2025.03.006
不同直链淀粉含量水稻品种籽粒灌浆过程中直链淀粉积累特性
Amylose Accumulation in Grain Filling Stage of Rice Varied on Amylose Content
摘要
Abstract
[Objective]Amylose accumulation during grain filling stage of rice varieties with varied amylose content was studied to decipher the starch synthesis mechanism for improved eating quality or processing performance by breeding.[Method]Waxy and two varieties of rice with high or medium amylose content were selected to monitor the changes on the dry matter,amylose accumulation and content in the grains during filling stage.The Logistic equation was used to fit and analyze the amylose accumulation.[Results]As rice grains developed and maturing,dry matter and amylose increased in a slow-fast-slow pattern.The 3 different varieties accumulated dry matter similarly in the manner of gradual incline,steep increase,then slow rise to reach a stabilized level.However,the time required to reach the maximum level varied from 15 d to 27 d.The Logistic equation could significantly predict the amylose accumulation of all 3 varieties at fitting coefficients(R2)of 0.967-0.998.The accumulation rate peaked at 7-9 d after anthesis which meant a shortened grain filling duration and an early arrival of maximum filling.It took 14-22 d after anthesis for a gain to arrive at the peak accumulation on amylose and 15-27 d on dry matter.Both rate and amount directly related to the amylose content in a grain.The high amylose rice variety had greater amylose synthesis ability with higher accumulation rate from the early filling stage than the low amylose varieties.[Conclusion]The model of Logistic function satisfactorily predicted the amylose accumulation of a rice grain.High amylose content tended to require longer time for the accumulation,unless the rice variety was highly efficient in amylose synthesis.关键词
水稻/籽粒灌浆/直链淀粉含量/直链淀粉/积累特性Key words
rice/grain filling/amylose content/amylose/accumulation characteristics分类
农业科学引用本文复制引用
黄建鸿,肖长春,曾跃辉,杨尚霖,韦新宇..不同直链淀粉含量水稻品种籽粒灌浆过程中直链淀粉积累特性[J].福建农业学报,2025,40(3):262-270,9.基金项目
国家现代农业产业技术体系建设专项(CARS-01) （CARS-01）
福建省科技计划农业引导性项目(2022N0040) （2022N0040）
三明市科技计划项目(2022-N-7、2024-N-3) （2022-N-7、2024-N-3）
