Abstract:
The investigation was carried out under field conditions to characterize eight F
8
boro rice lines and to study the variability among these lines during the period
of boro season (2016-2017) at the experimental field of Sher-e-Bangla
Agricultural University, Dhaka. The eight lines of boro rice were characterized
for 10 quantitative and 31 qualitative traits for following the release procedure.
Variability study was carried out on fifteen parameters to select the best lines
for further trial. The lines were characterized and categorized as per the
descriptors developed by Biodiversity International, IRRI and WARDA-2007
for DUS test of inbred rice. Among the qualitative characteristics variation was
observed in- leaf color, penultimate leaf: pubescence of blade, panicle
curvature, panicle: exertion, leaf senescence, decorticated grain: shape and
decorticated unpolished grain: color. Among the quantitative characteristics-
time of heading, stem: culm diameter, days to maturity, grain length, sterile
lemma length, decorticated grain length showed difference for all the lines. In
case of variability study plant height (cm), spikelets/panicle, filled grains/plant,
unfilled grains/plant, yield/plant (g), stem length (cm), days to maturity and
yield (t/ha) showed significant result. Minimum days to maturity were
observed in L2 (133.66) followed by L8 (134.33), L7 (135.66), L3 (137), L1
(138) and L5 (139) comparing with the checks L9 (141) and L10 (145).
Yield/plant (g) was highest for L7 (34.92 g) followed by L2 (33.16g), L3
(32.62g) and L5 (32.4g) comparing with the checks L9 (30.99g) and L10
(31.50g). The highest yield was obtained in L7 (8.79 t/ha), L2 (8.42 t/ha), L3
(8.1 t/ha) and L5 (7.85 t/ha) comparing with the checks L9 (7.69 t/ha) and L10
(7.75 t/ha). So, the most promising lines in respect of yield and time of
maturity were L2, L3, L5 and L7 which could be used for further trial in future
to follow the release procedure.
Description:
A Thesis
submitted to the Institute of Seed Technology,
Sher-e-Bangla Agricultural University, Dhaka,
in partial fulfillment of the requirements
for the degree of
MASTER OF SCIENCE
IN
SEED TECHNOLOGY
SEMESTER: JANUARY-JUNE, 2017