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Lin L, Qiu J, Zhang L, Wei C. Identification and analysis of nine new flo2 allelic mutants in rice. JOURNAL OF PLANT PHYSIOLOGY 2024; 301:154300. [PMID: 38964046 DOI: 10.1016/j.jplph.2024.154300] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/16/2024] [Revised: 06/23/2024] [Accepted: 06/24/2024] [Indexed: 07/06/2024]
Abstract
FLO2 is involved in grain development and storage substance synthesis in rice, and therefore can regulate grain size and quality. In this study, we identified 4 new flo2 allelic mutants with nonsense and frameshift mutation in the exon of 6, 10, 11 and 21 and 5 new flo2 allelic mutants with alternative splicing and frameshift mutation at the splicing site of intron 13, 14, 16 and 17. Compared with wild-type rice, the outer endosperm of flo2 mutants was transparent, and the inner endosperm was floury. Different mutation sites and types of FLO2 significantly decreased kernel width, thickness and weight to some extent. The contents of storage protein, starch, amylose and amylopectin showed significant decrease at different levels among 9 flo2 mutants. The expressions of most storage protein synthesis genes and starch synthesis-related genes were significantly down-regulated, and exhibited different ranges of variation among different flo2 mutants. This study could add helpful information for the roles of flo2 alleles in rice quality regulation and provide abundant germplasm resources for rice quality breeding.
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Affiliation(s)
- Lingshang Lin
- Key Laboratory of Crop Genetics and Physiology of Jiangsu Province, Jiangsu Key Laboratory of Crop Genomics and Molecular Breeding, Yangzhou University, Yangzhou, 225009, China; Co-Innovation Center for Modern Production Technology of Grain Crops of Jiangsu Province / Joint International Research Laboratory of Agriculture & Agri-Product Safety of the Ministry of Education, Yangzhou University, Yangzhou, 225009, China.
| | - Jiajing Qiu
- Key Laboratory of Crop Genetics and Physiology of Jiangsu Province, Jiangsu Key Laboratory of Crop Genomics and Molecular Breeding, Yangzhou University, Yangzhou, 225009, China; Co-Innovation Center for Modern Production Technology of Grain Crops of Jiangsu Province / Joint International Research Laboratory of Agriculture & Agri-Product Safety of the Ministry of Education, Yangzhou University, Yangzhou, 225009, China.
| | - Long Zhang
- Key Laboratory of Crop Genetics and Physiology of Jiangsu Province, Jiangsu Key Laboratory of Crop Genomics and Molecular Breeding, Yangzhou University, Yangzhou, 225009, China; Co-Innovation Center for Modern Production Technology of Grain Crops of Jiangsu Province / Joint International Research Laboratory of Agriculture & Agri-Product Safety of the Ministry of Education, Yangzhou University, Yangzhou, 225009, China.
| | - Cunxu Wei
- Key Laboratory of Crop Genetics and Physiology of Jiangsu Province, Jiangsu Key Laboratory of Crop Genomics and Molecular Breeding, Yangzhou University, Yangzhou, 225009, China; Co-Innovation Center for Modern Production Technology of Grain Crops of Jiangsu Province / Joint International Research Laboratory of Agriculture & Agri-Product Safety of the Ministry of Education, Yangzhou University, Yangzhou, 225009, China.
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Zhao J, Zhang Y, Zhang Y, Hu Y, Ying Y, Xu F, Bao J. Variation in starch physicochemical properties of rice with different genic allele combinations in two environments. J Cereal Sci 2022. [DOI: 10.1016/j.jcs.2022.103575] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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