Genomics and Applied Biology 2016, Vol.7, No.1, 1-9
3
08FAN10 and Khumal-4 were common in 2013 and 2014. Soil of the experimental plot was silty-clay loam with
pH 6.5 to 6.7 tested before transplanting. Recommended dose of fertilizers @80:30:30 kg/ha NPK were applied.
Full dose of phosphorus and potassium and half dose of nitrogen were applied as basal. 1/4
th
part of nitrogen was
applied at 30 days i.e. at tillering stage after 1
st
weeding and the remaining 1/4
th
part at booting stage after 2
nd
manual weeding. A total of 4m x 3m net plot area with a plant spacing of 20cm x 15cm was used for transplanting.
One seedling per hill was transplanted in both early and delayed transplanting. Rice early transplanting was done
in last week of June when seedlings were 25-28 days old but delayed transplanting was done at 1
st
week of July
when seedlings became 38-40 days old in all years of 2011, 2012, 2013 and 2014.
2.3 Data collection and analysis
Observations and data records of all the traits were made based on Standard Evaluation System for Rice (IRRI,
2002). Rice different parameters such as days to heading, days to maturity, panicle length, plant height, fertile
grain number per panicle and grain yield per hectare were taken. Days to heading and days to maturity were taken
when each plot was 80% flowered and matured respectively. Average plant height and panicle length were taken
from five plant of each plot before grain full physiological maturity. Grain yield per hectare were taken at 12%
moisture content. Statistical analysis was done by using MSTAT and GenStat program.
3 Result
3.1 Days to heading
Statistically significant difference in days to heading were found for both early and delayed transplanting in 2011
to 2013 and non significant in 2014 (p<0.05)(Figure 1). The average days to 80% rice heading was 84 and 111
days for early and delayed transplanting in 2011, 107 and 121 days in 2012, 113 and 121 days in 2013, and 106
and 127 days in 2014 (Table 2; Table 3; Table 4; Table 5). Longest days to heading were obtained from NR
11050-B-B-B-B-17 (122 days) in 2013 and shortest from Khumal 4 (78 days) in 2011 in early transplanting.
Similarly, longest days to heading were obtained from NR 11011-B-B-B-B-29 and 08FAN2 (132 days) in 2014
and shortest from NR 11082-B-B-16 and Khumal 11 (106 days) in 2011 in delayed transplanting.
Figure 1 Mean days to flowering and mean days to maturity of early and delayed transplanted rice from 2011 to 2014
3.2 Days to maturity
Statistically significant difference in days to maturity were found for both early and delayed transplanting in 2011,
2012, 2013 and non significant in 2014 (p<0.05). The average days to 80% rice maturity were 120 and 152 days in
2011, 144 and 158 days in 2012, 151 and 159 days in 2013, and 143 and 166 days in 2014 for early and delayed
transplanting (Table 2; Table 3; Table 4; Table 5). Longest days to maturity were recorded from NR
11050-B-B-B-B-17 (159 days) in 2013 and shortest from Khumal 4 (111 days) in 2011 in early transplanting.
Similarly, longest days to maturity were obtained from NR 11011-B-B-B-B-29 (178 days) in 2014 and shortest
from Khumal-4 (144 days) in 2011 in delayed transplanting (Table 2; Table 3; Table 4; Table 5).
