Seasonal influence on flowering behaviour and plant growth characters in parental lines of hybrid rice

摘要

Monthly sowings of parental lines of hybrid rice were carried out from August 1994 to July 1995 to elucidate information of seasonal influence on flowering behaviour and plant growth characters. Among the entries tested, IR 10198-66-2R showed extreme fluctuation in biometrical parameters recorded. Among the seasons, summer (Feb-May), followed by the period Oct-Jan were found to have better expression of floral characters and agronomic traits. Correlation studies with weather parameters (Heat Unit Concepts) showed significant relationships with selected parameters like days to first flowering, duration of flowering in a panicle and panicle exsertion percentage.