Abstract:
A field experiment was carricd out at Agronomy Field of Shcr-e-Bangla
Agricultural University, Dhaka during the period from August to November
2006 to study the growth and yield of inbred and hybrid rice with clonal tillers
age. The trial was conducted with two levels of treatments
viz. A. Variety:
BRRI dhan 32
and Sonarbangla I; and B. Clonal tillers age 20, 25,
30, 35 and
40 days. Variety had significant effect on all the parameters like plant height,
number of tillers hilY', leaf area index (LAI), total thy weight, total grains
panicle',
filled grains panicle', unfilled grains panicle
-'.
1000-grain weight,
grain yield and straw yield except effective tillers hilt', panicle length, rachis
panicl&', and harvest index. The highest grain yield (5.58 t lia) was obtained
from
the hybrid variety and the inbred variety gave the lowest grain yield (3.88
hi'). The hybrid variety had the highest filled grains panicle" (156.84) and
1000 grain weight (27.40 g) as compared to BRR[ dhan 32 but the highest
number of total grains flowering duration was found in inbred variety
compared to hybrid variety. Clonal tiller age (days) did no significantly
influence the growth and yield attributes except panicle length, where yowgcr
tillers gave longer panicles. Tillers age ranging from 20 to 30 days showed the
best performance than other clonal tillers age. The highest grain yield (5.10 t
ha4
) was obtained from the clonal tiller separation at 25 days and the lowest
grain yield (4.31 t hi') was obtained from the clonal tillers of 40 days. Tillers
hilt' was not affected by clonal tillers age except 60 DAT, where younger
tillers produced higher number of tillers hill
1
as compared to aged tillers. Aged
clonal tiller extended the flowering duration. It was concluded that clonal tillers
age should be within 20 to 30 days because aged clonal tillers affected the
growth and yield of both hybrid and inbred rice
