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11/26/13
1
Finding and Keeping the Best Vegetable Varieties
Frank Kutka, Theresa Podoll, and Steve Zwinger
Farm Breeding Club Co-‐Coordinators
With special thanks to Organic Seed Alliance, State Historical Society of North Dakota, Marvin
Baker, and Dave Christensen
Gardening has a long history here in the Dakotas
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What varieties of vegetables shall we grow?
• Hybrids • Open Pollinated • Heirloom
• Where do we Jind them?
Seeds to Explore!
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“Ensuring accessibility and suitability of vegetable varieties: Trialing vegetable varieties for traits and qualities needed by North Dakota market growers” • ND Specialty Crop Block Grant funding • Goal is to increase the accessibility of vegetable varieties well suited to ND
• Partners: • NPSAS/FBC • NDSU Plant Science Department • ND Farmers Market and Growers Ass. • Entrepreneurial Center for Horticulture • FARRMS • OSA • NOVIC
Project objectives: • 1: Evaluate five species using replicated
variety trials • 2: Identify breeding goals for cultivar
improvement • 3: Provide variety trial data to market
farmers
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Planning a Trial
• Prioritize crop species • Prioritize crop types • Identify goals of the trial • ID and source varieties
What varieties go into a trial?
• Popular commercial varieties of the crop type regionally and nationwide
• Older standards • Heirloom and exotic varieties
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What constitutes an effective trial?
• Multiple replications of entries • Consistent Jield conditions • Use border rows • Evaluate trials by “scoring” important traits
Randomization and Replication
B B B B B B B
B 3 2 1 4 5 B
B 1 3 5 2 4 B
B 5 2 3 4 1 B
B B B B B B B
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Soil = Environmental Variation
B B B B B B B
B 3! 2! 1! 4! 5! B
B 1! 3! 5! 2! 4! B
B 5! 2! 3! 4! 1! B
B B B B B B B
B B B B B B B
B 3! 2! 1! 4! 5! B
B 1! 3! 5! 2! 4! B
B 5! 2! 3! 4! 1! B
B B B B B B B
Marking and Mapping the Trial
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Measuring Characteristics
Kale Trial -‐ Seven Seeds Farm, Williams OR, 2009
Variety Source Vigor Uni-‐form? Flavor
Dis-‐ease Pests Overall
Winterbor F1 JSS 9 3 7 7 3 5.8
Red Russian ABBO 9 9 5 5 5 6.6
Red Russian UPR 7 7 5 5 1 5
*Red Russian SSF 9 9 5 5 7 7
Toscano JSS 3 7 7 9 5 6.2
*Lacinato WGS 7 7 7 7 7 7
Starbor F1 JSS 5 5 3 7 5 5
Ripbor F1 JSS 3 9 5 5 3 5
*Blue Vates ABBO 5 9 5 7 5 6.2
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Marvin and Ilene Baker Carrot Screen 2012
Foliar disease Root shape Root tip [ill
Root tip smoothness Root [lavor
Root sweetness Yield
The Flavor Critics: " Educators " Farmers " Extension agents " Spouse " Shareholders " Customers " Neighbors " Youth " Employees " Your Best Friend " Siblings
!!!
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Annual Plants Plants that complete the seed cycle in one season.
• Examples: Lettuce, SunJlowers, Corn, Cucumbers, Broccoli, Beans, Peas. Tender perennials-‐Tomatoes, Winter annuals-‐ Spinach, Chicory
• Much variation in time of Jlowering.
• Must plant early enough for seed set.
Biennial Plants Complete their seed cycle in two years • Example: Carrots, Beets, Cabbage, Celery, Onions, Parsnips, Swiss Chard, Turnips
• Some require vernalization to germinate well
• Must consider both vegetative and storage stages of life cycle.
• Plant for optimum over-‐wintering size and condition. Expect to lose some of crop over winter.
• Special selection considerations.
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Perennial Plants Plants that produce seed a year or two after growing and continue producing for several years.
• Example: Rhubarb, Asparagus, Sunchokes, Tree and small fruits, Many ornamental Jlowers, Many culinary and medicinal herbs.
• Must be winter hardy for your area.
• Some require vernalization to germinate
• Often don’t produce large quantities of seed each year.
Self Pollinating -‐ Cross Pollinating
IN BREEDERS OUT BREEDERS
Peas Lettuce Tomato Peppers Spinach Brassica Beets Squash Corn
3 ft 5ft 20ft 500ft 1mile 2miles 2+miles
Self pollinating Minimum isolation
Cross Pollinating Longer isolation
5 plants ok
50 plant min
200 + plants recommended
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Timing of Harvest • Plant early enough for seed maturity and then harvest at optimum seed set and maturity.
Harvest Techniques
• Cutting or Pulling Plants
• Picking
• Bucket Threshing
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Threshing Releases seed and breaks up plant material
Screening
• Separation by size
• Remove debris
• Hardware cloth, window screen, etc.
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Seed Storage • Moisture Content - silica gel
• Cleanliness; Insects
• Temperature F + Humidity = < 100
• Containers: envelopes, jars, rubbermaid, tupperware, bags
• Location: dry, cool, refrigerators and freezers, temperature fluctations
• Envelope test
What about variety improvement?
• Available varieties may not be the most adapted or productive
• Available varieties may not be the most marketable or desirable
• You may want independence and control over your variety and seed source
• You need an enjoyable and outrageously rewarding hobby that could grow into a career!
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“This bulletin is written… to present to the people of North Dakota a picture of the steps necessary in the development of a new
variety… so that they may perhaps be stimulated to undertake practical plant breeding themselves.”
A.F. Yeager, NDAC, Sunshine Sweet Corn, 1927
Step 1: Set Objectives
“One of the principal jobs is to recognize the need for a variety of a particular kind. With the need known we can then proceed to produce a variety to meet it.” A.F. Yeager, 1927
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h=p://www.liseed.org/acorndiv.html
h=p://seedsavers.org/
h=p://www.territorialseed.com
h=p://www.fao.org/nr/cgrfa
Step 2: Find Parents
Step 3: Make Crosses
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The process takes 5-‐10 years
“Dakota Tears” Onion • David Podoll of Fullerton, ND wanted healthy, long storing onions he could grow in North Dakota.
• He kept bulbs from a number of varieties that had performed well and replanted out those that stored well.
• Process repeated for many years (plant seed, select bulbs, store, reselect bulbs, plant selected bulbs, collect seed).
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“Dakota Tears” Onion
• Dakota Tears was released after some years and the seed is sold commercially.
“Dark Star” Zucchini • Bill Reynolds and Donna Ferguson grew “Raven” Zucchini for San Francisco markets where preferred type is dark green, 8” long, and 2” in diameter
• Due to seed shortage, began growing the OP “Black Beauty” instead, but had many off types
• Crossed Black Beauty and Raven, then conducted mass selection for four years followed by selJing and evaluation of the best selfed lines. Best one released as Dark Star.
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Dave’s Painted Mountain
Resources n Northern Plains Sustainable Agriculture Society Farm Breeding Club (www.npsas.org)
n Organic Seed Alliance (www.seedalliance.org) n Seed to Seed by Suzanne Ashworth n Buffalo Bird Woman’s Garden by Maxidiwiac and Gilbert Wilson
n Breed Your Own Vegetables by Carol Deppe n Seed Savers Exchange (WWW.SeedSavers.Org)
n www.howtosaveseeds.com