Self incompatibility in cole crops is overcome by

Self-incompatibility in cole crops is overcome by Bud Pollination, CO2 Treatment and NaCl spray.
Self-incompatibility is a widespread mechanism in flowering plants that prevents inbreeding and promotes outcrossing.
Bud Pollination is the most successful method in both the gametophytic and sporophytic systems. The most advantageous stage for the buds to overcome self-incompatibility is two to seven days before anthesis.
To maintain inbred lines of the crop plant, a method in that high CO₂ gas is treated to the pistils to overcome the self-incompatibility.
It had been shown that self-incompatibility could be overcome by NaCl in the self-incompatible Chinese cabbage.