A conditional mutation in a wheat (Triticum aestivum L.) gene regulating root morphology

• DOI: 10.1007/s00122-024-04555-7
• Publication Date: 2024-02-12T07:02:02Z
• Authors: Deying Zeng; Brett Ford; Jaroslav Doležel; Miroslava Karafiá...; Mathew J. Hayden; Tina M. Rathjen; Timothy S. George; Lawrie K. Brown; Peter R. Ryan; Filomena A. Petto...; Ulrike Mathesius; Emmanuel Delhaize
• Keywords: TILLING; Root hair; Wild type

Abstract Key message Characterisation and genetic mapping of a key gene defining root morphology in bread wheat. Root is central to plants for the efficient uptake up soil water mineral nutrients. Here we describe conditional mutant hexaploid wheat ( Triticum aestivum L.) that when grown with high Ca 2+ develops larger rhizosheath accompanied shorter roots than wild type. In wheat, size reliable surrogate hair length this was verified which possessed longer hairs type soil. We named Stumpy showed it be due single semi-dominant mutation. The short phenotype at reduced cellular elongation might also explain long phenotype. Analysis cell walls polysaccharide composition remodelled non-permissive (high) concentrations. mutation mapped chromosome 7B sequencing chromosomes both identified candidate underlying As part process determine whether causative, lines Cadenza TILLING population large rhizosheaths but normal length. This finding illustrates potential manipulating disconnect from as means developing improved efficiency nutrient uptake. will valuable understanding mechanisms regulate