Submergence is becoming a major problem in decreasing rice production. This study conducted a QTL analysis for submergence tolerance on germination stage using 165 recombinant inbred lines (RILs) derived from crosses between ‘Milyang 23’ and ‘Tong 88-7’. An integrated genetic linkage map consisting of 1,313 SNPs was constructed, which covered a total length of 1,254.59 cM, with an average distance of 0.96 cM between adjacent markers. Four QTLs were detected on chromosomes 1, 3, 4, and 7. In qSUB1 and qSUB3, the allele of ‘Tong88-7’ improved survival rates, while in qSUB4 and qSUB7 the allele of ‘Milyang 23’ improved the same. Phenotypic variance explanations for qSUB1, qSUB3, qSUB4, and qSUB7 were 9.44%, 14.62%, 9.74%, and 7.09%, respectively. The average survival rate of the lines with all four QTLs was 93.33±6.67%.

Citations

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• ‘Saebonghwang’: A High Grain Quality Mid-Late-Maturing Rice Cultivar Adaptable to Direct Seeding and Transplanting Cultivation
  Chang-Min Lee, Choon-Song Kim, Woon-Chul Shin, Man-Kee Baek, Hyun-Su Park, Jong-Cheol Ko, Jeong-Ju Kim, Jung-Pil Suh, O-Young Jeong, Keon-Mi Lee, Jeonghwan Seo, Song-Hee Park, Dongmin Back, Hyeonsoo Jang
  Korean Journal of Breeding Science.2024; 56(2): 147.     CrossRef
• Genome-Wide Association Study of Submergence Tolerance in Rice (Oryza sativa L.)
  Seong-Gyu Jang, Backki Kim, Yongchul Kim, Soon-Wook Kwon
  Plant Breeding and Biotechnology.2023; 11(1): 25.     CrossRef