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The ‘Technical’ Context for Seed
Supply Systems Development
Anne Mbora
Training Workshop on Improving Strategies for Germplasm Supply
Nairobi, 29th Oct. to 2nd Nov.2007
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Introduction
• Most of the information in all chapters of the technical guidelines is not new but a brief summary in simple, clear language
• The success of germplasm supply strategies depends on quality of sources of the reproductive material, the way germplasm is collected, handled and distributed
• These technical guidelines were thus developed to improve germplasm supply
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Seed Source• Germplasm sources are important for
seed strategies as the genetic quality of seed is determined by the quality of the seed source
• Site matching reduces adaptability concerns
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Seed Collection
• This chapter was developed to avail simple basic principals of seed collection
• This ensures the physical, physiological & genetic quality of seed is maintained
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Seed Processing
• Seed processing is carried out to safeguard physiological and physical quality of the seed
• Seed processing involves; sorting fruit,
removing seed from fruit (extraction), cleaning and grading seed and drying
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Seed Storage
• This chapter describes good ways of keeping seed viable and proper seed storage, both modern and traditional methods are covered
• Farmers could store seed (orthodox) in gourds or clay pots for more then two years (with good aeration)
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Seed Dormancy and Pre-sowing Treatments
• Poor germination is experienced by various organization in tree production
• This chapter was developed to speed up seed germination and ensure efficient use of the available seeds.
• Pre-sowing treatments are often applied to overcome seed dormancy and accelerate uniform germination of seed
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Seed Quality - Physiological and Genetic
• Seed quality refers to the value of the seed; The quality of seed is therefore important to all actors involved in the tree seed systems
• This chapter was thus developed to help in evaluating seed quality and promote the use of quality germplasm
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Seed Distribution
• Germplasm supply can be improved with an efficient flow of seed/seedlings and information on availability of these species and varieties
• Seed packaging and documentation are very important factors in seed distribution process
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Seed Documentation
• Documentation is important in germpasm supply strategies since it gives seed or plant material an identity
• Documentation provide quality assurance for the client and removes the burden of memorizing details during all the stages of seed production and distribution
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Additional materials• Video clips on seed handling• DANIDA guide to handling of tropical and subtropical seed (511 pages!)• LONGMAN tropical trees: propagation and planting manuals (Volumes 1-
4)• Tree Seed Management (Winrock, ICRAF and IFSP)• 8 IFSP demo room posters (collection, cleaning, storage, extraction,
drying, testing, …)• IFSP flip-over (visual extension material)• ICRAF nursery and vegetative propagation manuals, seed collection,
ordering and production guidelines, Agroforestry Seed database and scaling-up document
• Robbins materials (images) and resource (lecture notes) for tree seeds• CIAT handbook on business approaches for small-scale seed producers• Flora Bank guideline series for seed collection and storage (10
guidelines)
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