Introduction: Major fibre crop. China, India being the major cotton producers. Pakistan is 5th largest cotton producing country. 10% GDP 4 cultivated species. Large scale cultivation of hybrids in India and China. Need for cotton hybrids: 50% higher productivity. Wider adaptability. High stress resistance. Better fibre quality. Less time required for hybrid development. Types of hybrid: Conventional hybrids Non-conventional hybrids STEPS IN HYBRID SEED PRODUCTION Conclusion AND FUTURE PROSPECTS

1. HYBRID COTTON
DEVELOPMENT
MUHAMMAD
ARIF
16-ARID-3086
BSc(hons)

2. INTRODUCTION:
• Major fibre crop.
• China, India being the major cotton producers.
• Pakistan is 5th largest cotton producing country.
• 10% GDP
• 4 cultivated species.
• Large scale cultivation of hybrids in India and China.

3. NEED FOR COTTON HYBRIDS:
• 50% higher productivity.
• Wider adaptability.
• High stress resistance.
• Better fibre quality.
• Less time required for hybrid development.

4. TYPES OF HYBRID:
• Conventional hybrids
• Non-conventional hybrids.

5. 1) CONVENTIONAL HYBRIDS:
Hybrid development is done by hand emasculation which
involves 3 steps;
i. Identification of parents.
ii. Emasculation
iii. Pollination

6. STEPS IN HYBRID SEED
PRODUCTION(CONVENTIONAL):
• Emasculation of female parent.
• Crossing of parents.

7. A) DOAK METHOD OR THUMBNAIL
METHOD:

8. B) PINCHING OFF OF TOP OF COROLLA:

9. C) COPPER STRAW METHOD:

10. CROSSING OF PARENTS:

11. 2) MALE-STERILITY BASED HYBRIDS:
• Eliminates the process of emasculation.
• Thus less costly.
• Pollination is necessary.
• Cytoplasmic genetic male sterility.

12. USE OF CYTOPLASMIC GENETIC MALE
STERILITY:
• Combination of nuclear and cytoplasmic genes is involved.
• ABR system.
• The A, B and R lines are planted separately.
• Availability of a limited number of restorers.
• Transfer of undesirable characters.

14. CONCLUSION AND FUTURE PROSPECTS:
• Hybrid seed production should be increased.
• Use of approved hybrid seeds should be promoted.
• Need to develop CGMS based hybrids.

15. QUESTIONS?