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Identification and Characterization of Salt Tolerance of Wheat Germplasm Using a Multivariable Screening Approach

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Title Identification and Characterization of Salt Tolerance of Wheat Germplasm Using a Multivariable Screening Approach
 
Creator Oyiga, Benedict Chijioke
 
Contributor Sharma, Ram
Shen, J.
Baum, Michael
Ogbonnaya, Francis Chuks
Leon, Jens
Ballvora, Agim
 
Subject electrolyte leakage
growth stage
 
Description Salinity is one of the major limitations to wheat production worldwide. This study was designed to evaluate the level of genetic variation among 150 internationally derived wheat genotypes for salinity tolerance at germination, seedling and adult plant stages, with the aim of identifying new genetic resources with desirable adaptation characteristics for breeding programmes and further genetic studies. In all the growth stages, genotype and salt treatment effects were observed. Salt stress caused 33 %, 51 % and 82 % reductions in germination vigor, seedling shoot dry matter and seed grain yield, respectively. The rate of root and shoot water loss due to salt stress exhibited significant negative correlation with shoot K+, but not with shoot Na+ and shoot K+/Na+ ratio. The genotypes showed a wide spectrum of response to salt stress across the growth stages; however, four genotypes, Altay2000, 14IWWYTIR-19 and UZ-11CWA-8 (tolerant) and Bobur (sensitive), exhibited consistent responses to salinity across the three growth stages. The tolerant genotypes possessed better ability to maintain stable osmotic potential, low Na+ accumulation, higher shoot K+ concentrations, higher rates of PSII activity, maximal photochemical efficiency and lower nonphotochemical quenching (NPQ), resulting in the significantly higher dry matter production observed under salt stress. The identified genotypes could be used as parents in breeding for new varieties with improved salt tolerance as well as in further genetic studies to uncover the genetic mechanisms governing salt stress response in wheat.
 
Date 2016-06-01
2017-02-23T13:45:49Z
2017-02-23T13:45:49Z
 
Type Journal Article
 
Identifier https://onlinelibrary.wiley.com/doi/abs/10.1111/jac.12178
https://mel.cgiar.org/reporting/download/hash/7e3OI3yo
Benedict Chijioke Oyiga, Ram Sharma, J. Shen, Michael Baum, Francis Chuks Ogbonnaya, Jens Leon, Agim Ballvora. (1/6/2016). Identification and Characterization of Salt Tolerance of Wheat Germplasm Using a Multivariable Screening Approach. Journal of Agronomy and Crop Science, 202 (6), pp. 472-485.
https://hdl.handle.net/20.500.11766/5936
Open access
 
Language en
 
Rights CC-BY-NC-4.0
 
Format PDF
 
Publisher Wiley
 
Source journal of agronomy and crop science;202,(2016) Pagination 472-485