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Division Seminar: PB

Wednesday, November 23, 2016, 02:00pm - 03:00pm


QTL identification for reproductive-stage salinity tolerance in rice using high-density SNP linkage map

Mostafa Ahmadizadeh
PhD Student, Plant Breeding: Sari Agricultural Sciences and Natural Resources University (SANRU), Iran & PB Division, IRRI


Rice is one of the major food crops but its productivity is adversely affected by salinity stress. Reproductive stage salinity tolerance is most important as it is translated into grain yield. Due to the complexity of the trait and the lack of reliable stage-specific phenotyping techniques, mechanisms pertains to physiological and genetic complexity of reproductive stage salinity tolerance traits are not studied in details, thus, significantly slow down the progress of developing stress-tolerant cultivars. In the current research, 188 RILs derived from a cross between CSR28 and Sadri were used to identify quantitative trait loci for reproductive stage salinity tolerance, based on agro-morphological and physiological traits. Salt stress equivalent to EC 10 dSm-1 was imposed to rice plants. For genotyping and construction a linkage map 6K SNP chips was used. Quantitative trait loci (QTLs) with LOD values ranging from 2.98 to 4.46 were identified on chromosomes 1, 2, 3, 5, 7, 8 and 11, explaining 5.9–10.54 % of the phenotypic variation. The study reports the novel QTLs for reproductive-stage salt tolerance in rice using leaf clipping phenotyping approach and high density SNPs markers that could be useful in rice breeding programs for salt-tolerance.


PBGB Conference Room 1, NCBL