Steps suggested for maintaining genetic purity

• Providing adequate isolation to prevent contamination by natural crossing or mechanical mixtures
• Rouging of seed fields prior to the stage at which they could contaminate the seed crop.
• Periodic testing of varieties for genetic purity.
• Avoiding genetic shifts by growing crops in areas in their adaptation only.
• Certification of seed crops to maintain genetic purity and quality of seed.
• Adopting the generation system.
• Grow out tests.