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Dockter, Christoph; Gruszka, Damian; Braumann, Ilka; Druka, Arnis; Druka, Ilze; Franckowiak, Jerome; Gough, Simon P.; Janeczko, Anna; Kurowska, Marzena; Lundqvist, Joakim; Lundqvist, Udda; Marzec, Marek; Matyszczak, Izabela; Müller, André H.; Oklestkova, Jana; Schulz, Burkhard; Zakhrabekova, Shakhira; Hansson, Mats

Induced Variations in Brassinosteroid Genes Define Barley Height and Sturdiness, and Expand the Green Revolution Genetic Toolkit

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  • Media type: E-Article
  • Title: Induced Variations in Brassinosteroid Genes Define Barley Height and Sturdiness, and Expand the Green Revolution Genetic Toolkit
  • Contributor: Dockter, Christoph; Gruszka, Damian; Braumann, Ilka; Druka, Arnis; Druka, Ilze; Franckowiak, Jerome; Gough, Simon P.; Janeczko, Anna; Kurowska, Marzena; Lundqvist, Joakim; Lundqvist, Udda; Marzec, Marek; Matyszczak, Izabela; Müller, André H.; Oklestkova, Jana; Schulz, Burkhard; Zakhrabekova, Shakhira; Hansson, Mats
  • Published: American Society of Plant Biologists, 2014
  • Published in: Plant Physiology, 166 (2014) 4, Seite 1912-1927
  • Language: English
  • DOI: 10.1104/pp.114.250738
  • ISSN: 0032-0889; 1532-2548
  • Keywords: ECOPHYSIOLOGY AND SUSTAINABILITY
  • Origination:
  • Footnote:
  • Description: Reduced plant height and culm robustness are quantitative characteristics important for assuring cereal crop yield and quality under adverse weather conditions. A very limited number of short-culm mutant alíeles were introduced into commercial crop cultivais during the Green Revolution. We identified phenotypic traits, including sturdy culm, specific for deficiencies in brassinosteroid biosynthesis and signaling in semidwarf mutants of barley (Hordeum vulgare). This set of characteristic traits was explored to perform a phenotypic screen of near-isogenic short-culm mutant lines from the brachytic, breviaristatum, dense spike, erectoides, semibmchytic, semidwarf, and slender dwarf mutant groups. In silico mapping of brassinosteroid-related genes in the barley genome in combination with sequencing of barley mutant lines assigned more than 20 historic mutants to three brassinosteroid-biosynthesis genes (BRAS SINOSTEROID-6-OXID ASE, CONSTITUTIVE PHOTOMORPHOGENIC DWARF, and DIMINUTO) and one brassinosteroid-signaling gene (BRASSINOSTEROID-INSENSJTIVE1 [HvBRI1]). Analyses of F2 and M2 populations, allelic crosses, and modeling of nonsynonymous amino acid exchanges in protein crystal structures gave a further understanding of the control of barley plant architecture and sturdiness by brassinosteroidrelated genes. Alternatives to the widely used but highly temperature-sensitive uzu1 a allele of HvBRI1 represent potential genetic building blocks for breeding strategies with sturdy and climate-tolerant barley cultivais.
  • Access State: Open Access