*Corresponding author, Email address: jafarullahsau@gmail.com
Abstract
An experiment was conducted at the Sher-e-Bangla Agricultural
University during June through December 2014 to study the performance
of local and modern transplanted rainy season rice varieties under
drought stress condition. The experiment comprised 16 varieties; four
modern (BRRI dhan34, BRRI dhan33, BRRI dhan62 and BU dhan1) and
twelve local varieties (Kartik Shail, Doodh Kalam, Nakhuchi Mota,
Kartik Balam, Lal Mota, Kalo Khaia, Changshai, Basmati Shakkar
Khanna, Dholi Chikon, Ghashful Chikon, Moulata). Two experiments were
set; one in pot (stressed condition) in completely randomized design,
while another in a field following a randomized completely block
design under non-stressed condition. Stress condition was imposed
providing water in the pot when soil of the pots dried and plants
showed wilting symptoms. Each treatment was replicated three times.
In stressed condition, significantly longest plants (139.50 cm) were
found in Kartik Balam and Basmati Shakkar Khanna while highest number
of tillers hill-1 (20.33). In non-stressed condition, Rani Salute
showed the highest number of leaves hill−1 at 45 DAT (10.67 and
71.67, respectively). On the other hand, in stressed condition, at 45
DAT, Moulata produced maximum leaves hill−1(70.00), which was
statistically similar with DholiChikon, KaloKhaia and Changshai
(69.33, 66.67 and 66.33, respectively). Highest straw dry weight
(20.98 t ha-1) was found in Moulata. In non-stressed condition, the
longest plants (184.83 cm) were found in Kalo Khaia and highest
number of total tillers hill-1 (17.67) in BU Dhan 1. On and average,
the local varieties under stressed and nonstressed condition had
straw dry matter per hill of 66.01 and 82.37 g, respectively. The
corresponding values for the improved varieties were 32.96 and 46.93
g, respectively. The modern ones showed more reductions (29.76%) than
the local varieties (19.86%) due to the stress condition.
Key
words: Local rice, modern rice, T. aman rice and drought stress.
J. Expt. Biosci.9(2) July 2018
