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GrainGenes Gene Report: Rht18 (Triticum)

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Gene
Rht18 (Triticum)
Gene Class
Reduced height
Reference
ReferenceFord BA et al. (2018) Rht18 Semidwarfism in Wheat Is Due to Increased GA 2-oxidaseA9 Expression and Reduced GA Content. Plant Physiology 177:168-180.
[ Show all 6 ]
URL
Rht18 gene at Komugi: Catalogue of Gene Symbols for Wheat
Chromosome Arm
6AS
ReferenceWatanabe N (2008) Genetic collection and development of near-isogenic lines in durum wheat. Vestnik VOGiS 12:636-643.
Germplasm
Tetraploid stockIcaro
ReferenceKonzak CF (1987) Mutations and mutation breeding. Wheat and Wheat Improvement 428-443.
Comment
Allelic with XRht14 and Rht16 (Watanabe, 2008; Haque et al., 2011).
Mapping information: Rht18 - 25.1 cM - Xbarc3-6A (Watanabe, 2008).
Mapping information: Xbarc118-6A - 1.4 cM - Rht18/TdGA2Ox-A9/S470865SSR4/Xbarc37-6A - 0.4 cM - IWA4371 - 0.4 cM - Xgwm82.1-6A (Vikhe et al., 2017).
Hexaploid derivatives in the backgrounds of Fengchan 3, Jinmai 47 Rht8, and Xifeng 20 are reported in (Yang et al., 2015).
Independent 'overgrowth' mutants isolated from Icaris contained changes in the GA2oxA9 coding region, this gene is predicted to encode GA 2-oxidase that metabolizes GA biosynthetic intermediates into inactive products thus reducing bioactive GA1 (Ford et al., 2018).
Info Source
ReferenceMcIntosh RA et al. (1995) Catalogue of gene symbols for wheat. Proceedings of the 8th International Wheat Genetics Symposium 1333-1500.
ReferenceMcIntosh RA et al. (2013) Catalogue of Gene Symbols for Wheat- 2013 Edition Catalogue of Gene Symbols for Wheat.
ReferenceMcIntosh RA et al. (2018) Catalogue of Gene Symbols for Wheat- 2018 Supplement Catalogue of Gene Symbols for Wheat.
ReferenceMcIntosh RA et al. (2016) Catalogue of Gene Symbols for Wheat- 2015-2016 Supplement Catalogue of Gene Symbols for Wheat.
Data Curator
Cooper, LaurelMay-2021
Hart, Gary E.95.08.24

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