The Search for New Rice Genotypes with Resistance to Deep-Sea Flooding

The resistance of rice plants to deep-water flooding in Rostov oblast can be used as a “natural herbicide” to control weeds that reduce the yield of rice varieties up to 50%. A study of rice genotypes with different levels of resistance to deep-water flooding was carried out. Using molecular markers, we identified new genetic resources of tolerance to anaerobic stress factors in hybrid rice samples. Hybrid lines were analyzed for the most important breeding traits, and after crossing resistant donors with domestic high-yielding varieties, the SNORKEL1 (SK1) gene allele was detected in selected rice samples. The resistance of hybrids and parental varieties to flooding was tested by germination under hypoxic conditions. Promising genotypes of special interest for breeding, which can be used in programs for the introduction of herbicide-free farming technologies, were identified.