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- W4289519726 abstract "Abstract Soil salinity is one of the major abiotic stresses affecting crop yield. Developing salinity-tolerant varieties is critical for minimizing economic penalties caused by salinity and providing solutions for global food security. Many genes/QTL for salt tolerance have been reported in barley but only a few of them have been map-cloned. In this study, a total of 163 doubled haploid lines from a cross between a cultivated barley variety Franklin and the wild barley accession Tam407227 were used to map QTL for salinity tolerance. Two major QTL for salinity tolerance were identified on chromosomes 5H ( qS5.1 ) and 7H ( qS7.1 ), accounting for 11.7% and 27.8% of the phenotypic variation, respectively. Two QTL for Na + content in leaves under salinity stress were detected on chromosomes 1H ( qNa1.1 ) and 7H( qNa7.1 ). qS7.1 was fine-mapped to a 2.46 Mb physical interval using F 4 recombinant inbred lines (RILs). This region contains 23 high-confidence genes, with HvNCX which encodes a sodium/calcium exchanger being most likely the candidate gene. The HvNCX was highly induced by salinity stress and showed a greater expression level in a sensitive variety. cDNA sequencing of the HvNCX revealed that the difference between the two parents is conferred by a single Ala77Pro amino acid substitution, which is located on the transmembrane domain. These findings open new prospects for improving salinity tolerance in barley by targeting a previously unexplored trait." @default.
- W4289519726 created "2022-08-03" @default.
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- W4289519726 date "2022-08-02" @default.
- W4289519726 modified "2023-10-18" @default.
- W4289519726 title "HvNCX, a prime candidate gene for the novel qualitative locus qS7.1 controlling salinity tolerance and Na+ exclusion in wild barley" @default.
- W4289519726 doi "https://doi.org/10.21203/rs.3.rs-1817680/v1" @default.
- W4289519726 hasPublicationYear "2022" @default.
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