| dc.description | Cotton, being the king of fibers in preparing human apparel has played a key role in the
Development of civilization. Due to its importance in agriculture as well as industrial
economy, it is also known as “white gold".
Cotton is one of the important cash crops in Bangladesh. It is the main raw materials of
textile industry. Annual requirement of raw cotton for textile industry of Bangladesh is
estimated around 2.5 million bales. Local production is only about 0.1 million bales.
Around 4-5% of the national requirement is fulfilled through the local production,
remaining 95-96% is fulfiiled by importing raw cotton from USA (40%), CIS (35%),
Australia, Pakistan, South Africa and other country producing countries (25%) (BTMA,
March, 2002). Though cotton is an important cash crop and an important raw material
but the relative weightage of cotton within the cropping systems scenario is rather
marginal. The area under cotton cultivation ranges only between 0.08 percent (1987-88)
and 0.27 percent (1996-97) of the total cropped area respectively (BBS, 2000Statistical
Year book of Bangladesh). | en_US |
| dc.description.abstract | The field experiment was conducted in the experimental field of Department of Genetics
and Plant Breeding, Hajee Mohammad Danesh Science and Technology University,
Dinajpur, Bangladesh during the period from August 2012 to April 2013 to study the
genetic diversity of cotton inbred lines. In this research work, the seeds of 20 cotton
genotypes were used viz. JAO8/A, JA08/B, JA08/C, JA08/D, JA08/E, JA08/9, JA054,
JA0510, JA0526, BC0188,JA0541, BC073, BC0303, BC0342, BC0406, BC051, BC088,
CB9, CB10, and CB11. The experiment was laid out in the Randomized Complete
Block Design (RCBD) with three replications. Mean performance and divergence
analysis were done on yield and yield contributing characters namely, days to 50%
flowering, days to 50% ball splitting, number of vegetative branch, number of primary
branch, number of secondary branch, node number of fruiting branch, ball number per
plant, plant height, ball weight and yield. Days to ball splitting were significantly
different ranging from 115.667 to 125.333 days. The lowest days (115.667) was needed
for ball splitting in T17 line, and the highest days (125.333) was required in T8 line. The
plant height was varied from 111.933 to 134.567. The tallest plant height (134.567) was
recorded in Tl line where the shortest plant height was recorded from T19 line.
Maximum branch number (20.333) was recorded in T6 line and the minimum branch
number (17.467) was recorded in T18 line. The number of secondary branch was varied
from 14.533 to 17.467. The maximum secondary branch number (17.467) was recorded
in T14 line and the minimum secondary branch numbers (14.533) were recorded in T3
line. The number of balls were varied from 19.833 to 134.567. The highest balls per
plant (134.567) found in T3 line and the lowest balls per plant (19.833) found in T18
line. The ball weight was varied from 4.333 to 6.867. The highest ball weight (6.867)
found in T8 line and the lowest ball weight (4.333) found in T2 line. The seed cotton
yield was varied from 2111 to 3740.667 kg/ha. The highest seed cotton yield (3740.667)
found in T3 line and the lowest seed cotton yield (2111) found in T18 line. The number
of vegetative branch was varied from 2.567 to 5.267. The maximum vegetative branch
number (5.267) was recorded in T20 line and the minimum vegetative branch number
(2.567) was recorded in T2 line. The number of node of fruiting branch was significantly
varied from 5.2 to 7.333. The highest number of node of fruiting branch (7.333) found in
T3 line and the lowest number of node of fruiting branch (5.2) found in T7 line. | en_US |
