Host: The Japanese Society of Plant Physiologists
Pages 0255
Low-temperature is an important factor determinig germination of rice, but the underlying genetic mechanism of germination in low-temperature has not been well elucidated. We constructed a genetic map using recombinant inbred lines derived from two crosses Kakehashi x Dunghanshali and Iwatekko x Arroz da Terra in order to locate quantitative trait loci (QTLs) conferring low-temperature germination. Six QTLs were mapped. Three of six QTLs for low-temperature germination were contributed by Dunghanshali,and four of six were contributed by Arroz da Terra and two were shared between Dunghanhasli and Arroz da Terra. We mapped two of the most effective QTLs on chromosome 2 and chromosome 3, and are tying to isolate the causal genes by using F3 generation and BC2F2 of near isogenic lines. As a parallel effort, we performed screening of low-temperature germination mutants from EMS-treated rice mutant lines.
