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Differential coupling of gibberellin responses by Rht-B1c suppressor alleles and Rht-B1b in wheat highlights a unique role for the DELLA N-terminus in dormancy

Karel Van De Velde UGent, Peter Michael Chandler, Dominique Van Der Straeten UGent and Antje Rohde (2017) JOURNAL OF EXPERIMENTAL BOTANY. 68(3). p.443-455
abstract
During the Green Revolution, substantial increases in wheat (Triticum aestivum) yields were realized, at least in part, through the introduction of the Reduced height (Rht)-B1b and Rht-D1b semi-dwarfing alleles. In contrast to Rht-B1b and Rht-D1b, the Rht-B1c allele is characterized by extreme dwarfism and exceptionally strong dormancy. Recently, 35 intragenic Rht-B1c suppressor alleles were created in the spring wheat cultivar Maringa, and termed overgrowth (ovg) alleles. Here, 14 ovg alleles with agronomically relevant plant heights were reproducibly classified into nine tall and five semi-dwarf alleles. These alleles differentially affected grain dormancy, internode elongation rate, and coleoptile and leaf lengths. The stability of these ovg effects was demonstrated for three ovg alleles in different genetic backgrounds and environments. Importantly, two semi-dwarf ovg alleles increased dormancy, which correlated with improved pre-harvest sprouting (PHS) resistance. Since no negative effects on grain yield or quality were observed, these semi-dwarf ovg alleles are valuable for breeding to achieve adequate height reduction and protection of grain quality in regions prone to PHS. Furthermore, this research highlights a unique role for the first 70 amino acids of the DELLA protein, encoded by the Rht-1 genes, in grain dormancy.
Please use this url to cite or link to this publication:
author
organization
year
type
journalArticle (original)
publication status
published
subject
keyword
DELLA, dormancy, gibberellin (GA), pre-harvest sprouting, suppressor alleles, wheat, MATURITY ALPHA-AMYLASE, GREEN-REVOLUTION, DWARFING GENES, FALLING NUMBER, GRAIN-YIELD, ARABIDOPSIS-THALIANA, ISOGENIC LINES, SEED DORMANCY, PLANT-GROWTH, RHT
journal title
JOURNAL OF EXPERIMENTAL BOTANY
J. Exp. Bot.
volume
68
issue
3
pages
443 - 455
Web of Science type
Article
Web of Science id
000397158100011
ISSN
0022-0957
DOI
10.1093/jxb/erw471
language
English
UGent publication?
yes
classification
A1
copyright statement
Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)
id
8516822
handle
http://hdl.handle.net/1854/LU-8516822
date created
2017-04-04 08:23:41
date last changed
2017-09-20 11:13:38
@article{8516822,
  abstract     = {During the Green Revolution, substantial increases in wheat (Triticum aestivum) yields were realized, at least in part, through the introduction of the Reduced height (Rht)-B1b and Rht-D1b semi-dwarfing alleles. In contrast to Rht-B1b and Rht-D1b, the Rht-B1c allele is characterized by extreme dwarfism and exceptionally strong dormancy. Recently, 35 intragenic Rht-B1c suppressor alleles were created in the spring wheat cultivar Maringa, and termed overgrowth (ovg) alleles. Here, 14 ovg alleles with agronomically relevant plant heights were reproducibly classified into nine tall and five semi-dwarf alleles. These alleles differentially affected grain dormancy, internode elongation rate, and coleoptile and leaf lengths. The stability of these ovg effects was demonstrated for three ovg alleles in different genetic backgrounds and environments. Importantly, two semi-dwarf ovg alleles increased dormancy, which correlated with improved pre-harvest sprouting (PHS) resistance. Since no negative effects on grain yield or quality were observed, these semi-dwarf ovg alleles are valuable for breeding to achieve adequate height reduction and protection of grain quality in regions prone to PHS. Furthermore, this research highlights a unique role for the first 70 amino acids of the DELLA protein, encoded by the Rht-1 genes, in grain dormancy.},
  author       = {Van De Velde, Karel and Chandler, Peter Michael and Van Der Straeten, Dominique and Rohde, Antje},
  issn         = {0022-0957},
  journal      = {JOURNAL OF EXPERIMENTAL BOTANY},
  keyword      = {DELLA,dormancy,gibberellin (GA),pre-harvest sprouting,suppressor alleles,wheat,MATURITY ALPHA-AMYLASE,GREEN-REVOLUTION,DWARFING GENES,FALLING NUMBER,GRAIN-YIELD,ARABIDOPSIS-THALIANA,ISOGENIC LINES,SEED DORMANCY,PLANT-GROWTH,RHT},
  language     = {eng},
  number       = {3},
  pages        = {443--455},
  title        = {Differential coupling of gibberellin responses by Rht-B1c suppressor alleles and Rht-B1b in wheat highlights a unique role for the DELLA N-terminus in dormancy},
  url          = {http://dx.doi.org/10.1093/jxb/erw471},
  volume       = {68},
  year         = {2017},
}

Chicago
Van De Velde, Karel, Peter Michael Chandler, Dominique Van Der Straeten, and Antje Rohde. 2017. “Differential Coupling of Gibberellin Responses by Rht-B1c Suppressor Alleles and Rht-B1b in Wheat Highlights a Unique Role for the DELLA N-terminus in Dormancy.” Journal of Experimental Botany 68 (3): 443–455.
APA
Van De Velde, K., Chandler, P. M., Van Der Straeten, D., & Rohde, A. (2017). Differential coupling of gibberellin responses by Rht-B1c suppressor alleles and Rht-B1b in wheat highlights a unique role for the DELLA N-terminus in dormancy. JOURNAL OF EXPERIMENTAL BOTANY, 68(3), 443–455.
Vancouver
1.
Van De Velde K, Chandler PM, Van Der Straeten D, Rohde A. Differential coupling of gibberellin responses by Rht-B1c suppressor alleles and Rht-B1b in wheat highlights a unique role for the DELLA N-terminus in dormancy. JOURNAL OF EXPERIMENTAL BOTANY. 2017;68(3):443–55.
MLA
Van De Velde, Karel, Peter Michael Chandler, Dominique Van Der Straeten, et al. “Differential Coupling of Gibberellin Responses by Rht-B1c Suppressor Alleles and Rht-B1b in Wheat Highlights a Unique Role for the DELLA N-terminus in Dormancy.” JOURNAL OF EXPERIMENTAL BOTANY 68.3 (2017): 443–455. Print.