Genetic progress in grain yield and associated changes in spikelet and grain traits in historical set of Pannonian wheat cultivars

Mirosavljević, Milan; Momčilović, Vojislava; Dražić, Tanja; Aćin, Vladimir; Jocković, Bojan; Mikić, Sanja; Brbaklić, Ljiljana; Živančev, Dragan; Zorić, Miroslav; Pržulj, Novo

doi:10.1007/s10681-023-03262-6

Euphytica

2023

DOI: 10.1007/s10681-023-03262-6

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Genetic progress in grain yield and associated changes in spikelet and grain traits in historical set of Pannonian wheat cultivars

Milan Mirosavljević,

Vojislava Momčilović,

Tanja Dražić

et al.

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2024

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Cited by 1 publication

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TaMIR397-6A and -6B Homoeologs Encode Active miR397 Contributing to the Regulation of Grain Size in Hexaploid Wheat

Wang,

Wu,

Zhang

et al. 2024

IJMS

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Wheat is one of the most important food crops globally, and understanding the regulation of grain size is crucial for wheat breeding to achieve a higher grain yield. MicroRNAs (miRNAs) play vital roles in plant growth and development. However, the miRNA-mediated mechanism underlying grain size regulation remains largely elusive in wheat. Here, we report the characterization and functional validation of a miRNA, TamiR397a, associated with grain size regulation in wheat. The function of three TaMIR397 homoeologs was determined through histochemical β-glucuronidase-dependent assay. MiRNA expression was detected using quantitative reverse transcription polymerase chain reaction (qRT-PCR), and the function of TamiR397a was validated through its transgenic overexpression and repression in wheat. It was found that TaMIR397-6A and TaMIR397-6B encode active TamiR397a. The expression profiling indicated that TamiR397a was differentially expressed in various tissues and gradually up-regulated during grain filling. The inhibition of TamiR397a perturbed grain development, leading to a decrease in grain size and weight. Conversely, the overexpression of TamiR397a resulted in increased grain size and weight by accelerating the grain filling process. Transcriptome analysis revealed that TamiR397a regulates a set of genes involved in hormone response, desiccation tolerance, regulation of cellular senescence, seed dormancy, and seed maturation biological processes, which are important for grain development. Among the down-regulated genes in the grains of the TamiR397a-overexpressing transgenic plants, 11 putative targets of the miRNA were identified. Taken together, our results demonstrate that TamiR397a is a positive regulator of grain size and weight, offering potential targets for breeding wheat with an increased grain yield.

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TaMIR397-6A and -6B Homoeologs Encode Active miR397 Contributing to the Regulation of Grain Size in Hexaploid Wheat

Wang,

Wu,

Zhang

et al. 2024

IJMS

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show abstract

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Genetic progress in grain yield and associated changes in spikelet and grain traits in historical set of Pannonian wheat cultivars

Cited by 1 publication

References 36 publications

TaMIR397-6A and -6B Homoeologs Encode Active miR397 Contributing to the Regulation of Grain Size in Hexaploid Wheat

TaMIR397-6A and -6B Homoeologs Encode Active miR397 Contributing to the Regulation of Grain Size in Hexaploid Wheat

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