Abstract:
The efficiency of a breeding
program depends mainly on the direction of
the correlation between yield and its
components and the relative importance of
each component involved in contributing to
seed yield.Twenty one rapeseed genotypes
were evaluated based on randomized
complete block design with three
replications. Significant genotypes effects
were exhibited for phenological traits, plant
height, yield components except pod length
and seed yield, indicating significant genetic
differences among the genotypes. High
broad sense heritability were determined for
phenological traits, plant height and seed
yield demonstrating selection gain for
improving these traits will be high. Pods on
main axis and pods per plant had high value
of genetic coefficient of variation and also
were significant correlated with seed yield.
The results of factor analysis exhibited three
factors including first yield components
(plant height, pods on main axis and seed
yield), second yield components (pods per
plant, seeds per pod and 1000-seed weight)
and fixed capital factor (phenological traits).
On the basis of cluster analysis, the
genotypes were classified in three groups
and the group with high seed yield had high
mean values of plant height, days to
maturity and pods per plant.
