Detection of QTL for High-Temperature Tolerance in Rice Using a High-Density Bin Map

Rice is sensitive to high-temperature stress during almost all stages of growth and development. High-temperature has become one the main factors restricting high yield superior quality rice. In this study, recombinant inbred lines (RILs) derived from an indica rice cross between two restorer were planted in years. One sowing date was applied 2019, four dates set 2020 according period local temperatures recent Two traits closely related tolerance, heading (HD), spikelet fertility (SF) measured. each trial, HD showed a bimodal distribution, whereas SF had continuous left-skewed distribution. QTL analysis performed using high-density bin map. For HD, total six detected. All them correspond position cloned genes, among which qHD8 DTH8/Ghd8 region largest genetic effect. SF, eight Five them, qSF1, qSF2, qSF3.1, qSF3.2, qSF8, tolerance important potential breeding.