Breeding method for heat-resistant germplasm in booting stage of rice

The invention discloses a rice booting stage heat-resistant germplasm breeding method. The method comprises the following steps: selecting a heat-resistant rice variety and a drought-resistant rice variety; hybridizing heat-resistant rice and drought-resistant rice to obtain F1 bags; the F1-generation seeds and heat-resistant rice seeds are sown at the same time, and seedling cultivation is conducted under the appropriate growth condition of rice to obtain an F2-generation; carrying out selfing on the F2 generation twice; and carrying out heat-resistant treatment on a part of strains by setting heat-resistant conditions before the booting stage and in the booting stage, and the like. According to the scheme, a heat-resistant rice variety and a drought-resistant rice variety are selected to be hybridized, then an F1 generation and the heat-resistant rice variety are hybridized to obtain an F2 generation, then the F2 generation rice is subjected to selfing, meanwhile, high-temperature intervention is conducted