生物
水稻
农学
直链淀粉
粮食品质
作物
氮气循环
氮气
基因
生物技术
食品科学
淀粉
遗传学
化学
有机化学
作者
Xiaolan Liu,Yunlu Tian,Wenchao Chi,Hanzhi Zhang,Jun Yu,Gaoming Chen,Wei Wu,Xueyuan Jiang,Saisai Wang,Lin Zhixi,Wei Xuan,Jian Ye,Baoxiang Wang,Yan Liu,Zilong Sun,Dongdong Xu,C. M. Wang,Jianmin Wan
出处
期刊:Plant Journal
[Wiley]
日期:2022-04-28
卷期号:110 (6): 1751-1762
被引量:19
摘要
Excessive nitrogen fertilizer application is harmful to the environment and reduces the quality of cereal crops. Maintaining crop yields under low nitrogen (LN) conditions and improving quality are important goals for cereal crop breeding. Although the effects of nitrogen assimilation on crop nitrogen-use efficiency (NUE) have been intensively studied, natural variations of the key assimilation genes underlying grain development and quality are largely unclear. Here, we identified an NUE-associated gene, OsGS1;1, encoding glutamine synthase, through genome-wide association analysis, followed by validation experiments and functional analysis. Fifteen single-nucleotide polymorphisms in the OsGS1;1 region led to alternative splicing that generated two functional transcripts: OsGS1;1a and OsGS1;1b. The elite haplotype of OsGS1;1 showed high OsGS1;1b activity, which improved NUE, affected grain development, and reduced amylose content. The results show that OsGS1;1, which is induced under LN conditions, affects grain formation by regulating sugar metabolism and may provide a new avenue for the breeding of high-yield and high-quality rice (Oryza sativa).
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