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Natural variations in the promoter of Awn Length Inhibitor 1 (ALI‐1) are associated with awn elongation and grain length in common wheat

Wang, Dongzhi ; Yu, Kang ; Jin, Di ; Sun, Linhe ; Chu, Jinfang ; Wu, Wenying ; Xin, Peiyong ; Gregová, Edita ; Li, Xin ; Sun, Jiazhu ; Yang, Wenlong ; Zhan, Kehui ; Zhang, Aimin ; Liu, Dongcheng

The Plant journal : for cell and molecular biology, 2020-03, Vol.101 (5), p.1075-1090 [Periódico revisado por pares]

England: Blackwell Publishing Ltd

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Título:
Natural variations in the promoter of Awn Length Inhibitor 1 (ALI‐1) are associated with awn elongation and grain length in common wheat
Autor: Wang, Dongzhi ; Yu, Kang ; Jin, Di ; Sun, Linhe ; Chu, Jinfang ; Wu, Wenying ; Xin, Peiyong ; Gregová, Edita ; Li, Xin ; Sun, Jiazhu ; Yang, Wenlong ; Zhan, Kehui ; Zhang, Aimin ; Liu, Dongcheng
Assuntos: Alleles ; awn ; C2H2 zinc finger ; Cell proliferation ; Climate change ; Cloning ; Crop yield ; CYS2-HIS2 Zinc Fingers - genetics ; cytokinin ; Cytokinins ; Cytokinins - analysis ; Diagnostic systems ; Drought resistance ; Edible Grain ; Elongation ; Genes ; Genetic Variation ; Genome-wide association studies ; Genome-Wide Association Study ; Genomes ; Genotype ; Genotypes ; Grain ; grain length ; GWAS ; Homology ; Inhibitors ; Loci ; Nucleotides ; Photosynthesis ; Plant Proteins - genetics ; Promoter Regions, Genetic - genetics ; Signal transduction ; Single-nucleotide polymorphism ; Transcription ; Triticum - genetics ; Triticum - growth & development ; Triticum aestivum L ; Weight ; Wheat ; Zinc finger proteins
É parte de: The Plant journal : for cell and molecular biology, 2020-03, Vol.101 (5), p.1075-1090
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SourceType-Scholarly Journals-1
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Descrição: Summary Wheat awn plays a vital role in photosynthesis, grain production, and drought tolerance. However, the systematic identification or cloning of genes controlling wheat awn development is seldom reported. Here, we conducted a genome‐wide association study (GWAS) with 364 wheat accessions and identified 26 loci involved in awn length development, including previously characterized B1, B2, Hd, and several rice homologs. The dominant awn suppressor B1 was fine mapped to a 125‐kb physical interval, and a C2H2 zinc finger protein Awn Length Inhibitor 1 (ALI‐1) was confirmed to be the underlying gene of the B1 locus through the functional complimentary test with native awnless allele. ALI‐1 expresses predominantly in the developing spike of awnless individuals, transcriptionally suppressing downstream genes. ALI‐1 reduces cytokinin content and simultaneously restrains cytokinin signal transduction, leading to a stagnation of cell proliferation and reduction of cell numbers during awn development. Polymorphisms of four single nucleotide polymorphisms (SNPs) located in ALI‐1 promoter region are diagnostic for the B1/b1 genotypes, and these SNPs are associated with awn length (AL), grain length (GL) and thousand‐grain weight (TGW). More importantly, ali‐1 was observed to increase grain length in wheat, which is a valuable attribute of awn on grain weight, aside from photosynthesis. Therefore, ALI‐1 pleiotropically regulates awn and grain development, providing an alternative for grain yield improvement and addressing future climate changes. Significance Statement We systematically identified the loci controlling wheat awn length at genome level, and cloned the ALI‐1 underlying major awn inhibitor B1. Natural variations in the promoter of ALI‐1 are associated with awn elongation and grain length in common wheat, providing explanations for the effects of wheat awn on grain production. This work provides an alternative to achieve improved grain yield and address future extreme climates.
Editor: England: Blackwell Publishing Ltd
Idioma: Inglês

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Natural variations in the promoter of Awn Length Inhibitor 1 (ALI‐1) are associated with awn elongation and grain length in common wheat

Wang, Dongzhi ; Yu, Kang ; Jin, Di ; Sun, Linhe ; Chu, Jinfang ; Wu, Wenying ; Xin, Peiyong ; Gregová, Edita ; Li, Xin ; Sun, Jiazhu ; Yang, Wenlong ; Zhan, Kehui ; Zhang, Aimin ; Liu, Dongcheng

England: Blackwell Publishing Ltd

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