Potato as an inbred line-based crop. Part 2 Shelley Jansky, - - PowerPoint PPT Presentation

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potato as an inbred line based crop
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Potato as an inbred line-based crop. Part 2 Shelley Jansky, - - PowerPoint PPT Presentation

Oct 08, 2022 110 likes •273 views

Potato as an inbred line-based crop. Part 2 Shelley Jansky, USDA-ARS and UW-Madison David Douches, Michigan State University Amy Charkowski, Colorado State University Recap of 2017 presentation Breeding new varieties is challenging

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Potato as an inbred line-based crop. Part 2

Shelley Jansky, USDA-ARS and UW-Madison David Douches, Michigan State University Amy Charkowski, Colorado State University

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Recap of 2017 presentation

  • Breeding new varieties is challenging

– Cultivars are tetraploid and heterozygous

  • Segregate when crossed
  • Each variety is a completely new genetic

combination

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Recap of 2017 presentation

  • New breeding system

– Cultivars are diploid hybrids from inbred lines – Can create a new variety that is identical to an existing one, but with additional traits – Propagated by true seed

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Advantages of new system

  • 1. Incrementally improve cultivars
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♂

Inbred line Inbred line

♀

Hybrid

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“Expo”

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Female parent

♀

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Female parent

♂

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“Expo 2”

♀ ♂

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Advantages of new system

  • 1. Incrementally improve cultivars
  • 2. Propagate from true seed
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True Seed

  • Easy to produce

and store

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True Seed

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True Seed

  • Faster response to calamities
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True Seed

  • Quickly bulk up seed
  • f new varieties
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True Seed

  • Less disease transmission
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Advantages of new system

  • 1. Incrementally improve cultivars
  • 2. Propagate from true seed
  • 3. Genetic gains from breeding