![Maintenance of Genetic Purity of
Seed
• Importance, Methods, and Practices
• Presented by: [Your Name]
• Institution: [Your Institution]
• Date: [Your Date]](https://image.slidesharecdn.com/maintenanceofgeneticpurityofseed-250724202109-4e11d047/85/Maintenance_of_Genetic_Purity_of_Seed-pptx-1-320.jpg)
Maintenance_of_Genetic_Purity_of_Seed.pptx
- 1. Maintenance of Genetic Purity of Seed • Importance, Methods, and Practices • Presented by: [Your Name] • Institution: [Your Institution] • Date: [Your Date]
- 2. Introduction • • What is Genetic Purity? • • Importance of maintaining genetic purity in seed production • • Consequences of genetic deterioration
- 3. Factors Affecting Genetic Purity • • Natural crossing (cross-pollination) • • Mechanical mixtures • • Mutations • • Use of off-type plants • • Seed handling and storage errors
- 4. Importance of Genetic Purity • • Ensures uniform crop performance • • Maintains high yield potential • • Resistance to pests and diseases • • Market acceptability and certification standards
- 5. Stages of Seed Multiplication • • Nucleus seed • • Breeder seed • • Foundation seed • • Certified seed • (Genetic purity is crucial at each stage)
- 6. Methods of Maintaining Genetic Purity • • Field Standards: • - Isolation distance • - Roguing (removal of off-types) • - Border rows • • Seed Standards: • - Proper labeling and storage • - Use of approved seed sources
- 7. Isolation Techniques • • Spatial isolation • • Temporal isolation • • Physical barriers (e.g., netting, greenhouses)
- 8. Rouging • • Definition: Removal of undesirable plants • • When to rogue: Pre-flowering, flowering, post-flowering • • Benefits: Maintains varietal characteristics
- 9. Other Maintenance Practices • • Tagging and labeling of seed lots • • Regular inspection by seed certification agencies • • Controlled pollination in hybrid seed production
- 10. Seed Certification Standards • • Seed classes and their genetic purity requirements • • Minimum purity percentage: • - Breeder seed: 100% • - Foundation seed: 99.5% • - Certified seed: 99.0%
- 11. Role of Seed Grower and Agencies • • Trained seed producers • • Coordination with seed certification agencies • • Proper record maintenance
- 12. Conclusion • • Genetic purity is vital for seed quality • • Adopting best practices ensures crop success • • Farmer awareness is crucial
- 13. References • • ICAR manuals • • Seed Certification Guidelines • • Agricultural research papers