Seven lines or varieties of faba beans were top crossed to each of the three different genetic base testers, Alfred,crystal and Sham. The 21 top crosses and ten parental
Unes were grown In a random ized complete block design
with three replicatfon.s . Four crosses cxceedecj
signijىcargly the mid parrent and two of them were
sign1fىcan higher than the better parent for number of
pods per maui stem. For total shedding percentage, the
three crosses exhibited sign ffcant negative heterotic
effects relative to mid-parent. WhiLe . the most desirabLe ,
hezero& effest relative to better parent was obtained by
the cross Shani x 61/1311166. The mean squares due to
males . females arid males by femaLes were signflcanfor
all the studied traits . The results showed that
non-additive type of gene action was the more imporcaru
part of the total genetic variability for all the studied
traits. The male tester Alfred gave the desirable ‘gi
effect for no. of set pods, no. of mature pods and shedding
percentage of pod setting. Females Giza 2and 61/131.j/
expressed sign ijicwit negative gi effec for shedding %
of flowers and total shedding percentage, respectively.
The desirable inter- and infra - alLelic interact ions were
represent by two, six, three ,flue, two top crossesfor
number of flowers, no. of mature pods / main stem.
shedding of flowers . shedding of pod setting and
shedding percentage, respectively.