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GrainGenes Gene Report: Iw1 (Triticum)

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Gene	Iw1 (Triticum)
Gene Class	Glaucousness
Allele	W1^I^ (Triticum)
Reference	Huang D et al. (2017) Long noncoding miRNA gene represses wheat B-diketone waxes. Proceedings of the National Academy of Sciences, USA 114:E3149-E3158. Xu Z et al. (2015) Mapping the glaucousness suppressor Iw1 from wild emmer wheat 'PI 481521'. The Crop Journal 3:37-45. Wu H et al. (2013) Comparative High-Resolution Mapping of the Wax Inhibitors Iw1 and Iw2 in Hexaploid Wheat. PLoS ONE 8:e84691. Adamski NM et al. (2013) The Inhibitor of wax 1 locus (Iw1) prevents formation of B- and OH-B-diketones in wheat cuticular waxes and maps to a sub-cM interval on chromosome arm 2BS. The Plant Journal 74:989-1002.
URL	Iw1 gene at Komugi: Catalogue of Gene Symbols for Wheat
Chromosome Arm	2BS Tsunewaki K and Ebana K (1999) Production of near-isogenic lines of common wheat for glaucousness and genetic basis of this trait clarified by their use. Genes & Genetic Systems 74:33-41.
Germplasm	Alien chromosome substitution line Tetraploid stock LDNDIC521-2B Xu Z et al. (2015) Mapping the glaucousness suppressor Iw1 from wild emmer wheat 'PI 481521'. The Crop Journal 3:37-45. Hexaploid stock Shamrock Adamski NM et al. (2013) The Inhibitor of wax 1 locus (Iw1) prevents formation of B- and OH-B-diketones in wheat cuticular waxes and maps to a sub-cM interval on chromosome arm 2BS. The Plant Journal 74:989-1002. WE74 Wu H et al. (2013) Comparative High-Resolution Mapping of the Wax Inhibitors Iw1 and Iw2 in Hexaploid Wheat. PLoS ONE 8:e84691. Near isogenic stock S615/Cornell 5075//10*S615 Tsunewaki K and Ebana K (1999) Production of near-isogenic lines of common wheat for glaucousness and genetic basis of this trait clarified by their use. Genes & Genetic Systems 74:33-41. Tetraploid stock T. turgidum subsp. dicoccoides PI 481521 Xu Z et al. (2015) Mapping the glaucousness suppressor Iw1 from wild emmer wheat 'PI 481521'. The Crop Journal 3:37-45.
Comment	Mapping information: JIC007 - 1.47 cM- Iw1 -0.18 cM -JIC010/JIC011 (Adamski et al., 2013). Co-segregation with BF474014, CJ876545 and CD927782 and flanked by BE498358 and CA499581 within a 0.96 cM interval (Wu et al., 2013). Maps to bin 2BS3-0.84-1.00. Mapping information: Xgwm614-2B - Iw1/Xbarc35-2B/CD893659/CD927782/BQ788707/CD938589 - Be498111 (Xu et al., 2015). IW1 encodes a long non-coding RNA (LncRNA) that putatively arose from an inverted repeat of a carboxylesterase gene (80% homology) in the W1 cluster that consists of WI-COE (non-annotated carboxylesterase), WI-PKS (Traes_2BS_9E10D26DB, polykedide synthase), and WI-CYP (Traes_2BS_163390FC4, cytochrome P450-type hydroxylase). GenBank C-DNA sequence, KX823910. The IR region has >94% identity to an IR region in Ae. tauschii chromosome 2 that also produces MiRNA and a marker-based location similar to that of Iw2 (Huang et al., 2017).
Info Source	McIntosh RA et al. (2013) Catalogue of Gene Symbols for Wheat- 2013 Edition Catalogue of Gene Symbols for Wheat. McIntosh RA et al. (2016) Catalogue of Gene Symbols for Wheat- 2015-2016 Supplement Catalogue of Gene Symbols for Wheat. McIntosh RA et al. (2018) Catalogue of Gene Symbols for Wheat- 2018 Supplement Catalogue of Gene Symbols for Wheat. McIntosh RA et al. (2020) Catalogue of Gene Symbols for Wheat- 2020 Supplement Catalogue of Gene Symbols for Wheat.
Data Curator	Cooper, Laurel June-2021

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