Genetic mechanisms available in cauliflower, and cabbage:

Use of self-incompatible lines: The sporophytic system of self-incompatibility is used for hybrid seed production of cauliflower and cabbage. In general 3:1 self-incompatible and 1 self-compatible (pollinator) is followed to get sufficient amount of hybrid seeds.

Cytoplasmic Male Sterility: In recent times use of male sterility (CMS system) is getting more attention as an alternative to SI system due to its inherent advantage in the hybrid seed production of all cole crops.. Single cross hybrids are more uniform, while cost of the double cross hybrids is much cheaper than single cross hybrids.

Mechanism in solanaceous vegetables:

Male sterility:

Tomato: In hybrid seed production, male sterile lines can be used to cut done the expenditure incurred for emasculation operation. Stamenless and closed anther mutants can be used in hybrid seed production with success.

Chilli: Emasculation and hand pollination is most expensive method of hybrid seed production in chilli because of high labour cost and very low fruit set percentage. Therefore, genetic male sterility mechanism is more economical and can be exploited for hybrid seed production.

Sweet pepper: Both genic and cytoplasmic male sterility have been reported in Functional male sterility can be utilised in hybrid seed production.