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The RING-Type Domain-Containing Protein GNL44 Is Essential for Grain Size and Quality in Rice (Oryza sativa L.)

文献类型： 外文期刊

作者： He, Lei 1 ; Chen, Tao 1 ; Liang, Wenhua 1 ; Zhao, Chunfang 1 ; Zhao, Ling 1 ; Yao, Shu 1 ; Zhou, Lihui 1 ; Zhu, Zhen 1 ; Zhao, Qingyong 1 ; Lu, Kai 1 ; Wang, Cailin 1 ; Zhu, Li 3 ; Zhang, Yadong 1 ; Fajkus, Jiri 1 ;

作者机构： 1.Jiangsu Acad Agr Sci, Inst Food Crops, East China Branch Natl Ctr Technol Innovat Saline, Key Lab Jiangsu Prov Agrobiol, Nanjing 210014, Peoples R China

2.Zhongshan Biol Breeding Lab, Nanjing 210014, Peoples R China

3.China Natl Rice Res Inst, State Key Lab Rice Biol, Hangzhou 311400, Peoples R China

关键词： appearance quality; eating and cooking quality; grain yield; grain width; rice

期刊名称：INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES （ 影响因子：5.6； 五年影响因子：6.2 ）

ISSN： 1661-6596

年卷期： 2024 年 25 卷 1 期

页码：

收录情况： SCI

摘要： Grain size in rice (Oryza sativa L.) shapes yield and quality, but the underlying molecular mechanism is not fully understood. We functionally characterized GRAIN NUMBER AND LARGE GRAIN SIZE 44 (GNL44), encoding a RING-type protein that localizes to the cytoplasm. The gnl44 mutant has fewer but enlarged grains compared to the wild type. GNL44 is mainly expressed in panicles and developing grains. Grain chalkiness was higher in the gnl44 mutant than in the wild type, short-chain amylopectin content was lower, middle-chain amylopectin content was higher, and appearance quality was worse. The amylose content and gel consistency of gnl44 were lower, and protein content was higher compared to the wild type. Rapid Visco Analyzer results showed that the texture of cooked gnl44 rice changed, and that the taste value of gnl44 was lower, making the eating and cooking quality of gnl44 worse than that of the wild type. We used gnl44, qgl3, and gs3 monogenic and two-gene near-isogenic lines to study the effects of different combinations of genes affecting grain size on rice quality-related traits. Our results revealed additive effects for these three genes on grain quality. These findings enrich the genetic resources available for rice breeders.

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