Single plant selection in F2
progeny was effective when the performance of the selected F2
single plant families were
compared with the respective bulk progenies. The mean first infestation scores for aphids of all the families were
significantly lower than the respective bulk progenies. Selected single plant progenies also recorded higher mean values for
important traits related to aphid infestation. Seed yield per plant showed significantly positive genotypic correlation with
height up to first branch, number of siliqua on branches, total number of siliqua per plant and 100 seed weight. First
infestation score for aphids showed significantly negative correlations with length of main raceme, number of primary and
secondary branches. Second infestation score showed significantly negative correlation with length of main raceme and
number of primary branches but showed significantly positive correlation with first aphid infestation score. The result
suggested that lines with higher aphid resistance and higher seed yield could be selected from the progenies, if selection is
practiced for shorter plant height, more number of primary branches, higher number of seeds per siliqua and 100 seed weight
along with lower infestation scores.