Abstract
The photoperiodic control of flowering is one of the important responses of plants because it is directly related to success of reproduction of its progeny.
We have isolated a mutant that exhibited late flowering phenotype under natural light conditions by the screening of T-DNA inserted plants. T-DNA was integrated into the K-region (4th intron) of OsMADS50, which is homolog of Arabidopsis SOC1/AGL20. Under short day conditions (10h / 14h day / night), the mutant shows heading at the same time as wild type (around 80 days after sowing), but heading is very late (50 days later than wild type) under long day (14h / 10h day / night) compared to wild type. We are investigating expression of key genes involved in flowering in rice at several developing stages to understand the role of the OsMADS50/OsSOC1 in the photoperiodic control of flowering in rice.
