| Recently, the outbreak of brown planthopper in irrigated paddy fields in the lower northern region was found frequently due to continuous rice growing resulting in low yield of rice production. RD49 is a non–glutinous rice which is insensitive to photoperiod. This line was obtained from 3–way cross, PSL00508-3-1-1-4 /IR66738-118-1-2//IR68544-29-2-1-3-1-2. The average yield is 733 kg/rai which is 26, 15 and 6% greater than those of Chai Nat 1, Phitsanulok 2 and RD47, respectively whereas the maximum yield potential reaches 939 kg/rai. The plant type shows moderately strong culm with about 95 cm height, 102-107 days to maturity for seed broadcasting and 116 days for transplanting. The line is moderately resistant to brown planthopper and resistant to rice... |
