Please use this identifier to cite or link to this item: https://hdl.handle.net/2440/85517
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Type: Journal article
Title: A major locus for chloride accumulation on chromosome 5A in bread wheat
Author: Genc, Y.
Taylor, J.
Rongala, J.
Oldach, K.
Citation: PLoS One, 2014; 9(6):e98845-1-e98845-12
Publisher: Public Library of Science
Issue Date: 2014
ISSN: 1932-6203
1932-6203
Statement of
Responsibility: 
Yusuf Genc, Julian Taylor, Jay Rongala, Klaus Oldach
Abstract: Chloride (Cl−) is an essential micronutrient for plant growth, but can be toxic at high concentrations resulting in reduced growth and yield. Although saline soils are generally dominated by both sodium (Na+) and Cl− ions, compared to Na+ toxicity, very little is known about physiological and genetic control mechanisms of tolerance to Cl− toxicity. In hydroponics and field studies, a bread wheat mapping population was tested to examine the relationships between physiological traits [Na+, potassium (K+) and Cl− concentration] involved in salinity tolerance (ST) and seedling growth or grain yield, and to elucidate the genetic control mechanism of plant Cl− accumulation using a quantitative trait loci (QTL) analysis approach. Plant Na+ or Cl− concentration were moderately correlated (genetically) with seedling biomass in hydroponics, but showed no correlations with grain yield in the field, indicating little value in selecting for ion concentration to improve ST. In accordance with phenotypic responses, QTL controlling Cl− accumulation differed entirely between hydroponics and field locations, and few were detected in two or more environments, demonstrating substantial QTL-by-environment interactions. The presence of several QTL for Cl− concentration indicated that uptake and accumulation was a polygenic trait. A major Cl− concentration QTL (5A; barc56/gwm186) was identified in three field environments, and accounted for 27–32% of the total genetic variance. Alignment between the 5A QTL interval and its corresponding physical genome regions in wheat and other grasses has enabled the search for candidate genes involved in Cl− transport, which is discussed.
Keywords: Chromosomes, Plant
Triticum
Chlorides
Ions
Chromosome Mapping
Biomass
Quantitative Trait, Heritable
Phenotype
Quantitative Trait Loci
Sodium Chloride Symporters
Salinity
Stress, Physiological
Genetic Linkage
Rights: © 2014 Genc et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
DOI: 10.1371/journal.pone.0098845
Appears in Collections:Aurora harvest 7
Molecular and Biomedical Science publications

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