Mapping of novel salt tolerance QTL in an Excalibur × Kukri doubled haploid wheat population
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Type
ArticleAuthors
Asif, Muhammad A.Schilling, Rhiannon K.
Tilbrook, Joanne
Brien, Chris
Dowling, Kate
Rabie, Huwaida
Short, Laura
Trittermann, Christine
Garcia, Alexandre
Barrett-Lennard, Edward G.
Berger, Bettina
Mather, Diane E.
Gilliham, Matthew
Fleury, Delphine
Tester, Mark A.

Roy, Stuart J.
Pearson, Allison S.
KAUST Department
Biological and Environmental Science and Engineering (BESE) DivisionCenter for Desert Agriculture
Plant Science
The Salt Lab
Date
2018-07-30Online Publication Date
2018-07-30Print Publication Date
2018-10Permanent link to this record
http://hdl.handle.net/10754/628782
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Show full item recordAbstract
Key messageNovel QTL for salinity tolerance traits have been detected using non-destructive and destructive phenotyping in bread wheat and were shown to be linked to improvements in yield in saline fields.AbstractSoil salinity is a major limitation to cereal production. Breeding new salt-tolerant cultivars has the potential to improve cereal crop yields. In this study, a doubled haploid bread wheat mapping population, derived from the bi-parental cross of Excalibur × Kukri, was grown in a glasshouse under control and salinity treatments and evaluated using high-throughput non-destructive imaging technology. Quantitative trait locus (QTL) analysis of this population detected multiple QTL under salt and control treatments. Of these, six QTL were detected in the salt treatment including one for maintenance of shoot growth under salinity (QG(1–5).asl-7A), one for leaf Na+ exclusion (QNa.asl-7A) and four for leaf K+ accumulation (QK.asl-2B.1, QK.asl-2B.2, QK.asl-5A and QK:Na.asl-6A). The beneficial allele for QG(1–5).asl-7A (the maintenance of shoot growth under salinity) was present in six out of 44 mainly Australian bread and durum wheat cultivars. The effect of each QTL allele on grain yield was tested in a range of salinity concentrations at three field sites across 2 years. In six out of nine field trials with different levels of salinity stress, lines with alleles for Na+ exclusion and/or K+ maintenance at three QTL (QNa.asl-7A, QK.asl-2B.2 and QK:Na.asl-6A) excluded more Na+ or accumulated more K+ compared to lines without these alleles. Importantly, the QK.asl-2B.2 allele for higher K+ accumulation was found to be associated with higher grain yield at all field sites. Several alleles at other QTL were associated with higher grain yields at selected field sites.Citation
Asif MA, Schilling RK, Tilbrook J, Brien C, Dowling K, et al. (2018) Mapping of novel salt tolerance QTL in an Excalibur × Kukri doubled haploid wheat population. Theoretical and Applied Genetics 131: 2179–2196. Available: http://dx.doi.org/10.1007/s00122-018-3146-y.Sponsors
This project was funded by the Grains Research and Development Corporation (GRDC): Project UA00118 to MT, SJR; UA00145 to SJR, BB, MG and EGB-L; and UA00159 to SJR and MG. We also acknowledge the South Australian growers and Cunderdin Agricultural College, Western Australia who provided land for field trials, South Australian Research and Development Institute (SARDI) new varieties agronomy team, Kalyx Australia and Mr. David Farleigh (DPIRD), Mr. Rob Jeffrey (UWA), Dr. Louis Mayer (UWA), Dr. Victoria Marchesini (UWA), Dr. Christa Niemietz (UofA), Dr. Jiaen Qiu (UofA) and Mr. Nigel Schilling (UofA) for field trial assistance, and The Plant Accelerator® staff who assisted with the glasshouse experiments. The Plant Accelerator®, Australian Plant Phenomics Facility, is funded under the National Collaborative Research Infrastructure Strategy (NCRIS). The bread wheat genome assembly was accessed through the International Wheat Genome Sequencing Consortium at https://wheat-urgi.versailles.inra.fr/Seq-Repository/Assemblies. MAA thanks the University of Adelaide for Adelaide Scholarships International (ASI) and the Australian Centre for Plant Functional Genomics for his PhD stipend, also acknowledged the financial support from the Australian Society of Plant Scientists (ASPS), the Crop Science Society of South Australia Incorporated and the Plant Nutrition Trust to attend conferences. MT thanks King Abdullah University of Science and Technology (KAUST) for financial support.Publisher
Springer NatureJournal
Theoretical and Applied GeneticsAdditional Links
http://link.springer.com/article/10.1007/s00122-018-3146-yae974a485f413a2113503eed53cd6c53
10.1007/s00122-018-3146-y
Scopus Count
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