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Position: Home > Articles > Genetic analysis and gene mapping of a dwarf and liguleless mutation inbarley The Crop Journal 2022,10 (4)

Genetic analysis and gene mapping of a dwarf and liguleless mutation inbarley

作者：

Guo, Baojian;Qi, Jiang;Li, Dongfang;Sun, Hongwei;Lyu, Chao;Wang, Feifei;Zhu, Juan;Guo, Ganggang;Xu, Ruge

单位：

Lyu, Chao;Yangzhou Univ, Jiangsu Co Innovat Ctr Modern Prod Technol Grain C, Jiangsu Key Lab Crop Genom & Mol Breeding, Key Lab Plant Funct Genom,Minist Educ,Jiangsu Key, Yangzhou 225009, Jiangsu, Peoples R China.; Sun, Hongwei; Xu, Rugen] Yangzhou Univ, Joint Int Res Lab Agr & Agri Prod Safety, Minist Educ China, Yangzhou 225009, Jiangsu, Peoples R China.; Li, Dongfang; Wang, Feifei;[Guo, Ganggang] Chinese Acad Agr Sci, Inst Crop Sci, Key Lab Crop Germplasm Resources & Utilizat MOA, Natl Key Facil Crop Gene Resources & Genet Improve, Beijing 100081, Peoples R China; Qi, Jiang;[Guo, Baojian; Zhu, Juan

关键词：

Barley;EMS;Liguleless;ALOG;Shoot architectur

摘要：

Leaf development underlies crop growth and productivity and has been a major target of crop domesti-cation and improvement. However, most genes controlling leaf development in barley remain unknown. We identified a dwarf and liguleless (dl) mutant derived by ethylmethane sulfonate mutagenesis. The dl mutant showed dramatic changes in shoot architecture compared with wild-type (Yangnongpi 5) plants. Besides lacking ligules, the dl mutant showed much shorter plant height (28 cm) than Yangnongpi 5 (78 cm). By map-based cloning, the dl gene was localized to a 56.58-kb genomic interval on the long arm of chromosome 7. A C-to-T single-nucleotide substitution was identified at exon position 790, and is a functional mutation resulting in a proline-to-serine substitution at the 264th amino acid residue of HORVU7Hr1G106960. Consequently, HORVU7Hr1G106960 was identified as the DL gene, encoding 269 amino acids and containing the Arabidopsis LSH1 and Oryza G1 (ALOG) domain. DL is highly similar to rice OsG1-LIKE 1/2 (OsG1L1/2) and sorghum AWN1/AWN1-10 at the amino acid level. Although the dl mutant allele showed no expression changes in selected tissues by real-time PCR, we propose HORVU7Hr1G106960 as a candidate gene conferring the dwarf and liguleless phenotype in barley. (c) 2022 Crop Science Society of China and Institute of Crop Science, CAAS. Production and hosting by Elsevier B.V. on behalf of KeAi Communications Co., Ltd. This is an open access article under the CC BY-NC -ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).

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Genetic analysis and gene mapping of a dwarf and liguleless mutation inbarley

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