Which characteristics are present in cotton varieties that do not attract bollworms?
$(i)$ Smooth leaves
$(ii)$ Hairy leaves
$(iii)$ Stem thorns
$(iv)$ Nectar-containing
$(v)$ Low aspartic acid
$(vi)$ Nectar-less

Hybrid vigour is induced by

Which widely grown variety of rice,developed by the International Rice Research Institute $(IRRI)$ in Manila,Philippines,helped solve the food crisis in Asia?

Clonal selection technique is not useful for

Select the option that represents the correct sequence of steps for breeding a genetically diverse crop variety:
$(i)$ Selection and testing of superior recombinants
$(ii)$ Evaluation and selection of parents
$(iii)$ Collection of variability
$(iv)$ Testing,release,and commercialization of new cultivars
$(v)$ Cross-hybridization among the selected parents

Improved method of grafting is: