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Isolation Techniques for Seed Saving
 

Isolation Techniques for Seed Saving

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Isolation techniques for seed saving and preserving the characteristics of varieties in subsequent generations, including hand-pollination, mesh barriers and isolation by distance. Video is here: ...

Isolation techniques for seed saving and preserving the characteristics of varieties in subsequent generations, including hand-pollination, mesh barriers and isolation by distance. Video is here: http://www.youtube.com/watch?v=Bb5uoPzY5EU&

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  • this is a simplified illustration of cross-pollination.
  • despite having perfect flowers, several crops are potential outcrossers – pollen often moves between flowers and between plants
  • despite having perfect flowers, several crops are potential outcrossers – pollen often moves between flowers and between plants
  • despite having perfect flowers, several crops are potential outcrossers – pollen often moves between flowers and between plants

Isolation Techniques for Seed Saving Isolation Techniques for Seed Saving Presentation Transcript

  • ISOLATION TECHNIQUES Seed Savers Exchange Grant Olson
  • Our mission is to save North America’s diverse, but endangered, garden heritage for future generations by building a network of people committed to collecting, conserving, and sharing heirloom seeds and plants, while educating people about the value of genetic and cultural diversity.
  • Seed saving is the process of saving seeds from open- pollinated fruits, vegetables, grains, flower s & herbs. Open-pollinated varieties are maintained by allowing pollen to flow only between plants of the same variety. When pollen flows between different varieties within the same species, this is known as cross-pollination.
  • Cross-pollinated seed is not ideal for seed saving. Some form of isolation may be necessary to prevent cross- pollination between plants of different varieties within the same species. Depending on your plants and your environment, isolation may not be required.
  • (flower structure) anther produces pollen seeds form in ovary after fertilization stigma receives pollen
  • grow only one variety
  • distance
  • Self-Pollinating, Perfect Flowers
  • Self-Pollinating, Perfect Flowers
  • Self-Pollinating, Perfect Flowers
  • Insect-Pollinated, Perfect Flowers
  • Insect-Pollinated, Perfect Flowers
  • Insect-Pollinated, Perfect Flowers
  • Insect-Pollinated, Imperfect Flowers
  • Insect-Pollinated, Monoecious Plants
  • Insect-Pollinated, Monoecious Plants
  • Insect-Pollinated, Monoecious Plants
  • Insect-Pollinated, Monoecious Plants
  • Wind-Pollinated, Monoecious Plants
  • Wind-Pollinated, Dioecious Plants
  • Insect-Pollinated, Self-Incompatible Plants
  • Wind-Pollinated, Self-Incompatible Plants
  • time
  • Is physical isolation required? • are different varieties of your crop/species being grown within the pollination zone? • are these different varieties flowering at the same time as your plants?
  • barriers for self-pollinating plants
  • barriers for self-pollinating plants
  • barriers for insect-pollinated plants
  • barriers for insect-pollinated plants
  • barriers for insect-pollinated plants
  • barriers for wind-pollinated plants
  • for more information: Seed to Seed, Suzanne Ashworth The Organic Seed Grower, John Navazio A Seed Saving Guide for Gardeners and Farmers, OSA www.seedalliance.org/publications SSE Webinars www.seedsavers.org/webinars