| dc.description.abstract | A pot experiment was conducted at the Department of Genetics and Plant Breeding, Hajee
Mohammad Danesh Science and Technology University, Dinajpur, Bangladesh during the
period from November 2012 to April 2013 in order to study the genetic variability of 10
wheat genotypes in saline condition. The experiment was laid out in a Completely
Randomized Design (CRD) with three replications. In this experiment, the seeds of the 10
wheat genotypes were used viz. Aghrani, Sawrav, Shatabdi, BARI-25, BARI-27, PYT-12,
PYT-13, PYT-15, PYT-20 and BAW — 1135. Mean performance, mean separation,
variance, heritability, genetic advance and genetic advance of percent of mean were done
on yield and yield contributing characters namely days to heading, number of tillers, days
to maturity, plant height (cm), spike length (cm), spikelet per spike, grain per spike, root
length (cm), root volume (cm?), root weight (gm), root dry weight (gm) and grain yield per
plant. The highest grain yield per plant (3.297 gm) was recorded from BAW — 1135 again
the lowest (1.637 gm) was found from Aghrani. Analysis of variance reveals that, plant
height (23.03) is significant at 5% level of probability. On the other hand days to heading
(21.328), spike length (0.703) and grain per spike (67.470) are significant at 1 % level of
probability. Phenotypic variance (0.2433) was higher than genotypic (0.138) variance
which was supported by low difference between phenotypic (21.455%) coefficient of
variation and genotypic (16.158) coefficient of variation. Heritability estimates revealed
that characters like days to heading exhibited highest heritability followed by spike length
and grain per spike. Genetic Advance revealed that it was low in all the characters.
Genetic Advance as percent of mean revealed that it was high for grain per spike, yield per
plant, root volume and root weight and moderate estimates were exhibited by root dry
weight and number of tillers per plant and low genetic advance as percent of mean was
observed for days to heading, days to maturity, plant height, spike length, spikelet per
spike and root length. Moderate heritability (56.72%) was supported by high genetic
advance over mean (25.068). Characters like grain per spike showed high heritability
coupled with high genetic advance as percent of mean therefore, this character should be
given top priority during selection breeding in wheat in saline condition. | en_US |
