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Type: Journal article
Title: Genetics of Na⁺ exclusion and salinity tolerance in Afghani durum wheat landraces
Other Titles: Genetics of Na(+) exclusion and salinity tolerance in Afghani durum wheat landraces
Author: Shamaya, N.
Shavrukov, Y.
Langridge, P.
Roy, S.
Tester, M.
Citation: BMC Plant Biology, 2017; 17(1):209-1-209-8
Publisher: BioMed Central
Issue Date: 2017
ISSN: 1471-2229
Statement of
Nawar Jalal Shamaya, Yuri Shavrukov, Peter Langridge, Stuart John Roy and Mark Tester
Abstract: Bakground: Selecting for low concentration of Na⁺ in the shoot provides one approach for tackling salinity stress that adversely affects crop production. Novel alleles for Na⁺ exclusion can be identified and then introduced into elite crop cultivars. Results: We have identified loci associated with lower Na⁺ concentration in leaves of durum wheat landraces originating from Afghanistan. Seedlings of two F₂ populations derived from crossings between Australian durum wheat (Jandaroi) and two Afghani landraces (AUS-14740 and AUS-14752) were grown hydroponically and evaluated for Na⁺ and K⁺ concentration in the third leaf. High heritability was found for both third leaf Na⁺ concentration and the K⁺/Na⁺ ratio in both populations. Further work focussed on line AUS-14740. Bulk segregant analysis using 9 K SNP markers identified two loci significantly associated with third leaf Na⁺ concentration. Marker regression analysis showed a strong association between all traits studied and a favourable allele originating from AUS-14740 located on the long arm of chromosome 4B. Conclusions: The candidate gene in the relevant region of chromosome 4B is likely to be the high affinity K⁺ transporter B1 (HKT1;5-B1). A second locus associated with third leaf Na⁺ concentration was located on chromosome 3BL, with the favourable allele originating from Jandaroi; however, no candidate gene can be identified.
Keywords: Salinity tolerance; leaf Na⁺ concentration; K⁺/Na⁺ ratio; bulk segregant analysis; SNP markers; HKT1;5
Rights: © The Author(s). 2017 Open Access This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (, which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver ( applies to the data made available in this article, unless otherwise stated.
RMID: 0030077759
DOI: 10.1186/s12870-017-1164-6
Appears in Collections:Agriculture, Food and Wine publications

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