FLOURY ENDOSPERM19 encoding a class I glutamine amidotransferase affects grain quality in rice
文献类型： 外文期刊
作者： Lou, Guangming 1 ; Chen, Pingli 3 ; Zhou, Hao 1 ; Li, Pingbo 1 ; Xiong, Jiawang 1 ; Wan, Shanshan 1 ; Zheng, Yuanyuan; 1 ;
作者机构： 1.Huazhong Agr Univ, Natl Key Lab Crop Genet Improvement, Wuhan, Peoples R China
2.Huazhong Agr Univ, Natl Ctr Plant Gene Res, Wuhan, Peoples R China
3.Guangdong Acad Agr Sci, Guangdong Key Lab New Technol Rice Breeding, Rice Res Inst, Guangzhou 510640, Peoples R China
关键词： GWAS; Oryza sativa; Floury endosperm; CEQ; Class I glutamine amidotransferase
期刊名称：MOLECULAR BREEDING （ 影响因子：2.589； 五年影响因子：2.75 ）
ISSN： 1380-3743
年卷期： 2021 年 41 卷 6 期
页码：
收录情况： SCI
摘要： As a staple food for more than half of the world's population, the importance of rice is self-evident. Compared with ordinary rice, rice cultivars with superior eating quality and appearance quality are more popular with consumers due to their unique taste and ornamental value, even if their price is much higher. Appearance quality and CEQ (cooking and eating quality) are two very important aspects in the evaluation of rice quality. Here, we performed a genome-wide association study on floury endosperm in a diverse panel of 533 cultivated rice accessions. We identified a batch of potential floury genes and prioritize one (LOC_Os03g48060) for functional analyses. Two floury outer endosperm mutants (flo19-1 and flo19-2) were generated through editing LOC_Os03g48060 (named as FLO19 in this study), which encodes a class I glutamine amidotransferase. The different performances of the two mutants in various storage substances directly led to completely different changes in CEQ. The mutation of FLO19 gene caused the damage of carbon and nitrogen metabolism in rice, which affected the normal growth and development of rice, including decreased plant height and yield loss by decreased grain filling rate. Through haplotype analysis, we identified a haplotype of FLO19 that can improve both CEQ and appearance quality of rice, Hap2, which provides a selection target for rice quality improvement, especially for high-yield indica rice varieties.
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