Abstract:
An experiment was conducted at Laboratory of Department of Agronomy, Sher-eBangla
Agricultural University (SAU), Sher-e-Bangla Nagar, Dhaka-1207 during the
period from October 2016 to December 2016. A set of experiment was conducted in
three different experiments. The experiment was laid out in a Completely
Randomized Design (CRD) with five replications. Four wheat genotypes namely-
ESWYT 5, ESWYT 6, ESWYT 7 and BARI gom 28 were used as test crop and
different priming chemicals such as PEG, salt (NaCl) and distilled water were utilized
for osmo and hydro priming. The data on germination parameters of wheat like
germination percentage and growth parameters like root length, shoot length, dry
weight and vigour index. Data were analyzed using a computer software MSTAT-C.
The significance of difference among the treatments means was estimated by the
Least Significance Difference (LSD) at 1% level of probability. The first experiment
was carried out to find the effect of different concentration of PEG on germination
and growth behavior of four wheat genotypes (ESWYT 5, ESWYT 6, ESWYT 7 and
BARI gom 28) without any stress condition. It was found that ESWYT 5 showed the
highest germination rate (95.30%), shoot length (168.20 mm), root length (158.30
mm), shoot dry weight (0.0522 mg), root dry weight (0.0432 mg), relative water
content (95.05%), water retention capacity (16.18) and vigour index (311.30) with
primed seeds with 10% PEG solution for 12 hours. The second experiment was
conducted to optimization of pre-sowing priming time on the germination and growth
behavior of wheat genotypes. It was observed that ESWYT 5 with 10% PEG primed
seeds for 9 hours gave the highest germination rate (83.33%), shoot length (181.1
mm), root length (145.0 mm), shoot dry weight (0.0536 mg), root dry weight (0.0432
mg), relative water content (91.45%), water retention capacity (19.94) and vigour
index (272.3). In the third experiment germination and growth behavior of primed
seeds of wheat genotypes (ESWYT 5, ESWYT 6 and BARI gom 28) under salt
(NaCl) stress condition were evaluated. It was observed that highest germination rate
(93.81%), shoot length (157.80 mm), root length (124.6 mm), shoot dry weight (0.037
mg), root dry weight (0.0414 mg), relative water content (89.13%), water retention
capacity (22.32) and vigour index (264.7) were obtained from ESWYT 5 under
primed seeds placed without salt. But under salinity stress, the highest germination
rate (87.62%), shoot length (154.20 mm), root length (118.50 mm), shoot dry weight
(0.0349 mm) and root dry weight (0.0393 mg), relative water content (85.61 %),
water retention capacity (21.40) and vigour index (238.9) were achieved from
ESWYT 5 under primed seeds placed with 5 dsm
Description:
A Thesis
Submitted to the Faculty of Agriculture,
Sher-e-Bangla Agricultural University, Dhaka,
in partial fulfilment of the requirements
for the degree of
MASTER OF SCIENCE (MS)
IN
AGRONOMY