Comparative Performance of Hybrid and Elite Inbred Rice Varieties with respect to Their Source-Sink Relationship
Table 7
Source-sink relation and postheading crop growth rate of hybrid and inbred rice varieties at different dates of planting in dryseasons, 2008-200 and 2009-201.
Variety/planting dates
Ratio of spikelets number to LAa (cm−2)
Ratio of yield sink to LAa (mg cm−2)
Ratio of GDMCPn to LAb (mg cm−2)
Postheading CGR (gm−2 d−1)
2008-09
2009-10
2008-09
2009-10
2008-09
2009-10
2008-09
2009-10
Variety
BRRI hybrid dhan2
0.62a
0.68a
12.37ab
13.78a
10.03b
10.70b
15.05b
15.57
Heera2
0.65a
0.66a
13.05a
13.45a
10.30b
10.33b
16.21a
15.48
Inbred BRRI dhan45
0.56b
0.61b
12.03b
12.31b
11.56a
12.19a
14.42b
14.77
Planting date
20 December
0.63a
0.69a
13.33a
14.18a
10.75
11.40
15.91ab
16.15a
05 January
0.63a
0.66ab
12.71a
13.28a
10.70
10.93
16.09a
15.76a
20 January
0.61ab
0.65ab
12.57a
13.45a
10.75
11.23
15.10b
15.27ab
05 February
0.57b
0.61b
10.87b
11.82b
10.33
10.69
13.90c
13.90b
Interaction
Planting date × variety
NS
NS
NS
NS
NS
NS
NS
NS
CV (%)
9.90
8.83
8.31
7.97
9.36
7.09
8.27
10.26
Within a column, means followed by the same letter(s) are not significantly different at 5% level of probability by DMRT. site SAU, Dhaka. site BRRI, Gazipur. At heading. Average from heading to maturity. NS: nonsignificant at 5% level of significance. LA: leaf area. GDMCPn: grain dry matter from current photosynthate.
