Genetic Approaches to Develop Salt Tolerant Germplasm

Handle URI:
http://hdl.handle.net/10754/575516
Title:
Genetic Approaches to Develop Salt Tolerant Germplasm
Authors:
Tester, Mark A. ( 0000-0002-5085-8801 )
Abstract:
Forty percent of the world's food is produced under irrigation, and this is directly threatened by over-exploitation and changes in the global environment. One way to address this threat is to develop systems for increasing our ability to use lower quality water, in particular saline water. Low cost partial desalination of brackish water, use of saline water for cooling and increases in the salinity tolerance of crops can all contribute to the development of this new agricultural system. In this talk, the focus will be on the use of forward genetic approaches for discovery of genes related to salinity tolerance in barley and tomatoes. Rather than studying salinity tolerance as a trait in itself, we dissect salinity tolerance into a series of components that are hypothesised to contribute to overall salinity tolerance (following the paradigm of Munns & Tester, 2008). For example, one significant component of tolerance of most crop plants to moderate soil salinity is due to the ability to maintain low concentrations of Na+ in the leaves, and much analysis of this aspect has been done (e.g. Roy et al., 2013, 2014). A major site for the control of shoot Na+ accumulation is at the plasma membrane of the mature stele of the root. Alleles of HKT, a major gene underlying this transport process have been characterized and, in work led by Dr Rana Munns (CSIRO), have now been introgressed into commercial durum wheat and led to significantly increased yields in saline field conditions (Munns et al., 2012). The genotyping of mapping populations is now highly efficient. However, the ability to quantitatively phenotype these populations is now commonly limiting forward progress in plant science. The increasing power of digital imaging and computational technologies offers the opportunity to relieve this phenotyping bottleneck. The Plant Accelerator is a 4500m2 growth facility that provides non-destructive phenotyping of large populations of plants (http://www.plantphenomics.org.au/). New genetic loci for previously under-studied components of salinity tolerance discovered using this new approach will be presented. The application of these technologies provides opportunities to significantly increase abiotic stress tolerance of crops, and thus contribute to increasing agricultural production in many regions, especially in the face of global environmental change. However, this needs to be tested in the field, such as done by Munns et al (2012) and Schilling et al. (2014). To this end, work will be described where mapping populations are grown in the field, and also grown in the Accelerator, and loci for traits are being compared with loci for tolerance in the field.
KAUST Department:
Biological and Environmental Sciences and Engineering (BESE) Division
Citation:
Genetic Approaches to Develop Salt Tolerant Germplasm 2015, 29:300 Procedia Environmental Sciences
Publisher:
Elsevier BV
Journal:
Procedia Environmental Sciences
Conference/Event name:
Agriculture and Climate Change - Adapting Crops to Increased Uncertainty (AGRI 2015).
Issue Date:
19-Aug-2015
DOI:
10.1016/j.proenv.2015.07.273
Type:
Presentation
ISSN:
18780296
Additional Links:
http://linkinghub.elsevier.com/retrieve/pii/S1878029615005502
Appears in Collections:
Presentations; Biological and Environmental Sciences and Engineering (BESE) Division

Full metadata record

DC FieldValue Language
dc.contributor.authorTester, Mark A.en
dc.date.accessioned2015-08-23T07:55:40Zen
dc.date.available2015-08-23T07:55:40Zen
dc.date.issued2015-08-19en
dc.identifier.citationGenetic Approaches to Develop Salt Tolerant Germplasm 2015, 29:300 Procedia Environmental Sciencesen
dc.identifier.issn18780296en
dc.identifier.doi10.1016/j.proenv.2015.07.273en
dc.identifier.urihttp://hdl.handle.net/10754/575516en
dc.description.abstractForty percent of the world's food is produced under irrigation, and this is directly threatened by over-exploitation and changes in the global environment. One way to address this threat is to develop systems for increasing our ability to use lower quality water, in particular saline water. Low cost partial desalination of brackish water, use of saline water for cooling and increases in the salinity tolerance of crops can all contribute to the development of this new agricultural system. In this talk, the focus will be on the use of forward genetic approaches for discovery of genes related to salinity tolerance in barley and tomatoes. Rather than studying salinity tolerance as a trait in itself, we dissect salinity tolerance into a series of components that are hypothesised to contribute to overall salinity tolerance (following the paradigm of Munns & Tester, 2008). For example, one significant component of tolerance of most crop plants to moderate soil salinity is due to the ability to maintain low concentrations of Na+ in the leaves, and much analysis of this aspect has been done (e.g. Roy et al., 2013, 2014). A major site for the control of shoot Na+ accumulation is at the plasma membrane of the mature stele of the root. Alleles of HKT, a major gene underlying this transport process have been characterized and, in work led by Dr Rana Munns (CSIRO), have now been introgressed into commercial durum wheat and led to significantly increased yields in saline field conditions (Munns et al., 2012). The genotyping of mapping populations is now highly efficient. However, the ability to quantitatively phenotype these populations is now commonly limiting forward progress in plant science. The increasing power of digital imaging and computational technologies offers the opportunity to relieve this phenotyping bottleneck. The Plant Accelerator is a 4500m2 growth facility that provides non-destructive phenotyping of large populations of plants (http://www.plantphenomics.org.au/). New genetic loci for previously under-studied components of salinity tolerance discovered using this new approach will be presented. The application of these technologies provides opportunities to significantly increase abiotic stress tolerance of crops, and thus contribute to increasing agricultural production in many regions, especially in the face of global environmental change. However, this needs to be tested in the field, such as done by Munns et al (2012) and Schilling et al. (2014). To this end, work will be described where mapping populations are grown in the field, and also grown in the Accelerator, and loci for traits are being compared with loci for tolerance in the field.en
dc.language.isoenen
dc.publisherElsevier BVen
dc.relation.urlhttp://linkinghub.elsevier.com/retrieve/pii/S1878029615005502en
dc.rightsArchived with thanks to Procedia Environmental Sciences. This is an open access article under the CC BY-NC-ND license ( http://creativecommons.org/licenses/by-nc-nd/4.0/ ).en
dc.subjectsalinity toleranceen
dc.subjectabiotic stressen
dc.subjectirrigationen
dc.subjection transporten
dc.titleGenetic Approaches to Develop Salt Tolerant Germplasmen
dc.typePresentationen
dc.contributor.departmentBiological and Environmental Sciences and Engineering (BESE) Divisionen
dc.identifier.journalProcedia Environmental Sciencesen
dc.conference.date15 - 17 February 2015en
dc.conference.nameAgriculture and Climate Change - Adapting Crops to Increased Uncertainty (AGRI 2015).en
dc.conference.locationAmsterdam, The Netherlandsen
dc.eprint.versionPublisher's Version/PDFen
dc.contributor.affiliationKing Abdullah University of Science and Technology (KAUST)en
kaust.authorTester, Mark A.en
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