Genetics of Na+ exclusion and salinity tolerance in Afghani durum wheat landraces
Type
ArticleKAUST Department
Biological and Environmental Science and Engineering (BESE) DivisionCenter for Desert Agriculture
Plant Science
Plant Science Program
The Salt Lab
Date
2017-11-21Online Publication Date
2017-11-21Print Publication Date
2017-12Permanent link to this record
http://hdl.handle.net/10754/626200
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Show full item recordAbstract
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. 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. 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.Citation
Shamaya NJ, Shavrukov Y, Langridge P, Roy SJ, Tester M (2017) Genetics of Na+ exclusion and salinity tolerance in Afghani durum wheat landraces. BMC Plant Biology 17. Available: http://dx.doi.org/10.1186/s12870-017-1164-6.Sponsors
This study was primarily supported by the Australian Centre for Plant Functional Genomics within The University of Adelaide through grants from the Australian Research Council and the Grains Research and Development Corporation. Financial support from King Abdullah University of Science and Technology (KAUST) is also gratefully acknowledged. The funders have no role in the study design, data analysis and interpretation, and manuscript writing.Publisher
Springer NatureJournal
BMC Plant BiologyPubMed ID
29157217Additional Links
http://link.springer.com/article/10.1186/s12870-017-1164-6Relations
Is Supplemented By:- [Dataset]
Nawar Shamaya, Shavrukov, Y., Langridge, P., Roy, S., & Tester, M. (2017). Genetics of Na+ exclusion and salinity tolerance in Afghani durum wheat landraces. Figshare. https://doi.org/10.6084/M9.FIGSHARE.C.3935362.V1. DOI: 10.6084/m9.figshare.c.3935362.v1 Handle: 10754/663921
ae974a485f413a2113503eed53cd6c53
10.1186/s12870-017-1164-6
Scopus Count
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