Research advances on the low phytic acid rice breeding and their genetic physiological regulation and environmental adaptability

提高或维持水稻产量的同时，提高稻米品质已成为目前水稻育种的首要目标之一。其中，通过降低籽粒 中植酸等抗营养因子，增加锌、铁生物有效性以提升水稻营养品质，是目前水稻品质改良的一个重要方向。本文 主要综述了水稻籽粒中植酸合成的代谢路径、低植酸水稻的筛选及相关功能基因的遗传特点、植酸生理代谢的调 控网络、低植酸水稻农艺性状劣变和生态适应性降低的生理原因、籽粒植酸合成的环境调控效应等相关研究进展。 可为低植酸水稻品质改良以及栽培调优提供借鉴。. Breeding variety with improved quality while maintaining or improving yields is one of the primary objectives in rice breeding. Among which, reducing the anti-nutritional factors, such as grain phytic acid content, is an effective strategy to cope with hidden hunger and increase grain bioavailabilities of zinc and iron. In this paper, we reviewed the biosynthesis of phytic acid and the genetic characteristics of related functional genes, the co-regulatory networks of phytic acid synthesis and other physiological metabolism, breeding of low phytic acid (lpa) germplasm resource and their genetic characteristics, agronomic performance and environmental ecological adaptability of lpa mutants, the possible reasons for their agronomic deterioration and ecological adaptation change, and the environmental regulation of grain phytic acid accumulation. Those contents could provide reference for production of lpa rice with suitable agronomic cultivation practices. © Chinese Journal of Rice Science.