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|Title:||Identification of salt tolerance QTL in a wheat RIL mapping population using destructive and non-destructive phenotyping|
|Citation:||Functional Plant Biology, 2020; OnlinePubl(2):1-10|
|Muhammad A. Asif, Melissa Garcia, Joanne Tilbrook, Chris Brien, Kate Dowling, Bettina Berger ... et al.|
|Abstract:||Bread wheat (Triticum aestivum L.) is one of the most important food crops, however it is only moderately tolerant to salinity stress. To improve wheat yield under saline conditions, breeding for improved salinity tolerance of wheat is needed. We have identified nine quantitative trail loci (QTL) for different salt tolerance sub-traits in a recombinant inbred line (RIL) population, derived from the bi-parental cross of Excalibur × Kukri. This population was screened for salinity tolerance subtraits using a combination of both destructive and non-destructive phenotyping. Genotyping by sequencing (GBS) was used to construct a high-density genetic linkage map, consisting of 3236 markers, and utilised for mapping QTL. Of the nine mapped QTL, six were detected under salt stress, including QTL for maintenance of shoot growth under salinity (QG(1-5).asl-5A, QG(1-5).asl-7B) sodium accumulation (QNa.asl-2A), chloride accumulation (QCl.asl-2A, QCl.asl-3A) and potassium:sodium ratio (QK:Na.asl-2DS2). Potential candidate genes within these QTL intervals were shortlisted using bioinformatics tools. These findings are expected to facilitate the breeding of new salt tolerant wheat cultivars.|
|Keywords:||Chloride; non-destructive phenotyping; potassium; salinity; shoot ion-independent tolerance; sodium; quantitative trait locus; wheat|
|Description:||Published online 24 August 2020|
|Rights:||Journal Compilation © CSIRO 2020 Open Access CC BY-NC-ND|
|Appears in Collections:||Agriculture, Food and Wine publications|
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