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A single nucleotide substitution in the MATE transporter gene regulates plastochron and the many noded dwarf phenotype in barley(Hordeum vulgare L.)

引用

Journal of Integrative Agriculture 2023年第8期22卷 2295-2305页

作者： GUO Bao-jian SUN Hong-wei QI Jiang HUANG Xin-yu HONG Yi HOU Jian Lü Chao WANG Yu-lin WANG Fei-fei ZHU Juan GUO Gang-gang XU Ru-gen Jiangsu Key Laboratory of Crop Genomics and Molecular Breeding/Key Laboratory of Plant Functional Genomics Ministry of Education/Jiangsu Key Laboratory of Crop Genetics and Physiology/Jiangsu Co-Innovation Center for Modern Production Technology of Grain CropsYangzhou UniversityYangzhou 225009P.R.China State Key Laboratory of Barley and Yak Germplasm Resources and Genetic Improvement/Tibet Academy of Agricultural and Animal Husbandry Sciences(TAAAS) Lhasa 850002P.R.China Key Laboratory of Crop Germplasm Resources and Utilization Ministry of Agriculture/National Key Facility for Crop Gene Resources and Genetic Improvement/Institute of Crop SciencesChinese Academy of Agricultural SciencesBeijing 100081P.R.China

In higher plants,the shoot apical meristem produces lateral organs in a regular spacing(phyllotaxy)and timing(plastochron).The molecular analysis of mutants associated with phyllotaxy and plastochron would increase our understanding of the mechanism of shoot architecture *** this study,we identified mutant mnd8ynp5 that shows an increased rate of leaf emergence and a larger number of nodes in combination with a dwarfed growth habit from an EMS-treated population of the elite barley cultivar Yangnongpi *** a map-based cloning strategy,the mnd8 gene was narrowed down to a 6.7-kb genomic interval on the long arm of chromosome *** analysis revealed that a C to T single-nucleotide mutation occurred at the first exon(position 953)of HORVU5Hr1G118820,leading to an alanine(Ala)to valine(Val)substitution at the 318th amino acid ***,HORVU5Hr1G118820 was defined as the candidate gene of MND8 encoding 514 amino acids and containing two multidrug and toxic compound extrusion(MATE)*** is highly homologous to maize Bige1and has a conserved function in the regulation of plant development by controlling the leaf initiation *** of modern barely varieties showed that Hap-1 was the dominant haplotype and was selected in barley breeding around the ***,our results indicated that mnd8ynp5 is a novel allele of the HORVU5Hr1G118820 gene that is possibly responsible for the shortened plastochron and many noded dwarf phenotype in barley.

关键词： barley EMS plastochron many noded dwarf MATE transporter shoot architecture

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