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Huang L, Gan M, Zhao W, Hu Y, Du L, Li Y, Zeng K, Wu D, Hao M, Ning S, Yuan Z, Feng L, Zhang L, Wu B, Liu D. Characterization and Mapping of a Rolling Leaf Mutant Allele rlT73 on Chromosome 1BL of Wheat. Int J Mol Sci 2024; 25:4103. [PMID: 38612912 PMCID: PMC11012251 DOI: 10.3390/ijms25074103] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2024] [Revised: 04/02/2024] [Accepted: 04/05/2024] [Indexed: 04/14/2024] Open
Abstract
Leaf rolling is regarded as an important morphological trait in wheat breeding. Moderate leaf rolling is helpful to keep leaves upright and improve the photosynthesis of plants, leading to increased yield. However, studies on the identification of genomic regions/genes associated with rolling leaf have been reported less frequently in wheat. In this study, a rolling leaf mutant, T73, which has paired spikelets, dwarfism, and delayed heading traits, was obtained from a common wheat landrace through ethyl methanesulfonate mutagenesis. The rlT73 mutation caused an increase in the number of epidermal cells on the abaxial side and the shrinkage of bulliform cells on the adaxial side, leading to an adaxially rolling leaf phenotype. Genetic analysis showed that the rolling leaf phenotype was controlled by a single recessive gene. Further Wheat55K single nucleotide polymorphism array-based bulked segregant analysis and molecular marker mapping delimited rlT73 to a physical interval of 300.29-318.33 Mb on the chromosome arm 1BL in the Chinese Spring genome. We show that a point mutation at the miRNA165/166 binding site of the HD zipper class III transcription factor on 1BL altered its transcriptional level, which may be responsible for the rolling leaf phenotype. Our results suggest the important role of rlT73 in regulating wheat leaf development and the potential of miRNA-based gene regulation for crop trait improvement.
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Affiliation(s)
- Lin Huang
- State Key Laboratory of Crop Gene Exploration and Utilization in Southwest China, Sichuan Agricultural University, Chengdu 611130, China
| | - Meijuan Gan
- Triticeae Research Institute, Sichuan Agricultural University, Chengdu 611130, China
| | - Wenzhuo Zhao
- Triticeae Research Institute, Sichuan Agricultural University, Chengdu 611130, China
| | - Yanling Hu
- Triticeae Research Institute, Sichuan Agricultural University, Chengdu 611130, China
| | - Lilin Du
- Triticeae Research Institute, Sichuan Agricultural University, Chengdu 611130, China
| | - Yuqin Li
- Triticeae Research Institute, Sichuan Agricultural University, Chengdu 611130, China
| | - Kanghui Zeng
- Triticeae Research Institute, Sichuan Agricultural University, Chengdu 611130, China
| | - Dandan Wu
- Triticeae Research Institute, Sichuan Agricultural University, Chengdu 611130, China
| | - Ming Hao
- Triticeae Research Institute, Sichuan Agricultural University, Chengdu 611130, China
| | - Shunzong Ning
- Triticeae Research Institute, Sichuan Agricultural University, Chengdu 611130, China
| | - Zhongwei Yuan
- Triticeae Research Institute, Sichuan Agricultural University, Chengdu 611130, China
| | - Lihua Feng
- State Key Laboratory of Crop Gene Exploration and Utilization in Southwest China, Sichuan Agricultural University, Chengdu 611130, China
| | - Lianquan Zhang
- State Key Laboratory of Crop Gene Exploration and Utilization in Southwest China, Sichuan Agricultural University, Chengdu 611130, China
| | - Bihua Wu
- Triticeae Research Institute, Sichuan Agricultural University, Chengdu 611130, China
| | - Dengcai Liu
- Triticeae Research Institute, Sichuan Agricultural University, Chengdu 611130, China
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