Abstract:
A pot experiment was conducted to study the growth, physiology and yield
performance of different wheat genotypes under various water deficit conditions at
Sher-e-Bangla Agricultural University, Dhaka during the period from October 2019 to
March 2020. The experiment consisted of two factors, and followed Completely
Random Design (CRD) with four replications. Factor A: Wheat genotypes (4) viz;
V
1
: BARI Gom-29, V
2
: BARI Gom-30,V
3
: BARI Gom-32 and V
: BARI Gom-33
and and Factor B:Drought level (4) viz; D
0
4
: Control-3 times irrigation: crown root
initiation (CRI) stage (17-21 DAS), flowering stage (50-55 DAS) and maturity stage
(70-80 DAS); D
: 2 times irrigation: crown root initiation (CRI) stage (17-21 DAS)
and flowering stage (50-55 DAS); D
1
: 1 time irrigation: crown root initiation (CRI)
stage (17-21 DAS); D
3
2
: no irrigation. Among different wheat genotypes BARI Gom32
(V
) performed better and recorded the highest 1000 grain weight (37.38 g) and
grain yield plant
3
-1
(32.28 g). In case of different drought levels increasing drought
levels significantly reduced relative water content, membrane stability index and
chlorophyll content comparable to control treatment and the lowest grain yield (23.35
g plant
-1
) was recorded in D
3
treatment. The highest grain yield (36.18 g plant
)
stover yield (20.80 g plant
-1
) and biological yield (56.99 g plant
-1
) was found in D
control treatment. In case of harvest index the highest was found in D
(69.35 %)
treatment. In case of Interaction cultivation of BARI Gom-32 (V
) and in absence of
drought stress condition recorded the maximum grain yield plant
3
(38.50 g)
comparable to other treatment Interactions. Increasing drought condition disrupted
plant growth and development and the lowest grain yield (23.35 g plant
) was
recorded inV
1
D
Therefore, the growth and yield of wheat decreased with the
increasing drought level, and cultivation of drought tolerance wheat genotype can be a
suitable approach to tolerate drought stress condition in drought prone areas.
3.
-1
3
-1
-1
0
Description:
A Thesis
Submitted to the Department of Agricultural Botany,
Sher-e-Bangla Agricultural University, Dhaka,
in partial fulfillment of the requirements for the degree of
MASTER OF SCIENCE
IN
AGRICULTURAL BOTANY
SEMESTER: JANUARY-JUNE, 2021
