Please use this identifier to cite or link to this item: http://hdl.handle.net/2440/110367
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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
1471-2229
Statement of
Responsibility: 
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 (http://creativecommons.org/licenses/by/4.0/), 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 (http://creativecommons.org/publicdomain/zero/1.0/) 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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