Out of twenty eight F2s, four
F2s expressed significant positive inbreeding
depression and ten F2s exhibited significant negative
inbreeding depression. Eight F2s registered nonsignificant
negative inbreeding depression.
F1 crosses showed significant positive heterosis over
mid-parent, better parent and standard parent in
desirable direction. The F1, ICGV-91114 x K-1375
recorded the highest relative heterosis (469.23%) and
heterobeltiosis (428.57%) coupled with high positive
inbreeding depression for number of secondary
branches per plant indicating the preponderance of
additive gene action in the inheritance of this trait.
Significant differences in heterotic effects
were observed. This indicates the influence
of cytoplasm and its interaction with nuclear
genes in the manifestation of heterosis (Dwivedi
et al., 1989).