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Small Farmer's Journal
PO Box 1627
Sisters, Oregon 97759
800-876-2893
541-549-2064
agrarian@smallfarmersjournal.com
Mon - Thu, 8am - 4pm PDT

 

Wild potatoes bring increased calcium for better tubers

Coming to SFJ as a press release from Crop Science Society

 

potatoes
Have you ever cut into a potato to find a dark spot or hollow part? Early research shows that these defects are likely the result of calcium deficiencies in the potato — and that tuber calcium is genetically linked to tuber quality.

Neither consumers at grocery stores nor the companies that make potato chips and fries want these low calcium defects. In addition to the cosmetic issues, these potatoes are more likely to rot.

Most farmed varieties of potatoes have naturally low levels of calcium. So researchers at the USDA-ARS and University of Wisconsin-Madison, including Shelley Jansky, John Bamberg, and Jiwan Palta looked to wild potatoes. Their purpose: to breed new potato cultivars with high calcium levels.

Many wild potato relatives are still present in South America. Their presence means growers’ potato plants in that region often exchange genes with wild species. “That’s a way they continue to evolve as the climate changes or as disease and pest patterns change,” says Jansky. “But (in the United States), we have removed our potatoes from that environment. We have to breed new genes in from these wild relatives when we want to improve our cultivars.”

These wild relatives are an invaluable resource for scientists across the country. “If you go down there and drive along the roadside you can see these weedy, wild plants growing along the roads and fields,” says Jansky. “Whenever we have looked for any trait in wild potato species, we have been able to find it.”

And so it was with searching for a high calcium potato. The team found a wild potato with almost seven times as much calcium as a usual variety.

The next job was to isolate the calcium trait. Jansky and her colleagues interbred the high- and low-calcium potatoes. The resulting generations showed a ‘molecular marker’—a pattern in the plant’s natural DNA. This pattern led researchers to the plant’s calcium trait.

potato

“Finding this marker will allow us—and other breeding programs—to make faster progress in breeding potato plants with high tuber calcium content,” says Jansky. “This has been difficult and time-consuming in the past. You have to grow all the populations, harvest tubers, and then analyze the tubers for the trait you are looking at — in this case tuber calcium levels. And that’s a long, laborious process.”

A typical breeding program grows and assesses up to 100,000 seedlings every year. It takes between 10-15 years to release a particular variety of crop plant.

However, the process simplifies with known molecular markers. “We can collect DNA from seedlings and check for these molecular markers,” says Yong Suk Chung, the first author of this study. “If you have the marker present, then you select those seedlings and save a tremendous amount of time and labor.”
Jansky’s research is published in Crop Science.

Spotlight On: How-To & Plans

Lightning Protection for the Farm

Lightning Protection for the Farm

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Lightning-protection systems for buildings give lightning ready-made lines of low resistance. They do this by providing unbroken bodies of material that have lower resistance than any other in the immediate neighborhood. A protection system routes lightning along a known, controlled course between the air and the moist earth. Well-installed and maintained, a lightning-protection system will route lightning with over 90-percent effectiveness.

Chicken

The Best Chicken Pie Ever

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She has one more gift to give: Chicken Pie.

Portable A-Frame

Portable A-Frame

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These portable A-frames can be used for lots of lifting projects. Decades ago, when I was horselogging on the coast I used something similar to this to load my short logger truck. Great homemade tool.

The Milk and Human Kindness Stanchion Floor

The Milk and Human Kindness: Plans for an Old Style Wooden Stanchion Floor

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The basic needs that we are addressing here are as follows: To create a sunny, airy (not drafty), dry, convenient, accessible place to bring in our cow or cows, with or without calves, to be comfortably and easily secured for milking and other purposes such as vet checks, AI breeding, etc. where both you and your cow feel secure and content. A place that is functional, clean, warm and inviting in every way.

Work Horse Handbook

Grooming Work Horses

The serviceability of the work horse may be increased or decreased according to the care which is bestowed upon him. If he is groomed in a perfunctory fashion his efficiency as an animal motor is lessened. On the other hand, if he is well groomed he is snappier and fresher in appearance and is constantly up on the bit.

Building a Community, Building a Barn

Building a Community, Building a Barn

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One of the most striking aspects of this development is the strength and confidence that comes from this communal way of living. While it is impressive to build a barn in a day it seems even more impressive to imagine building four barns or six, and all the rest of the needs of a community. For these young Amish families the vision of a shared agricultural community is strong, and clear.

Soil, Vegetation, and Acidity

From Dusty Shelves: Audels Gardeners and Growers Guide teaches us about soil acidity.

The Tip Cart

The Tip Cart

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When horses were the main source of power on every farm, in the British Isles it was the tip-cart, rather than the wagon which was the most common vehicle, and for anyone farming with horses, it is still an extremely useful and versatile piece of equipment. The farm cart was used all over the country, indeed in some places wagons were scarcely used at all, and many small farms in other areas only used carts.

Disc Harrow Requirements

Disc Harrow Requirements

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One of the most important requirements is disc blade concavity, that is, correct concavity. Further along we set forth the purposes of disc concavity. We feel it is important enough to devote the extra time and words in a discussion of the subject, because seldom is disc concavity talked about, and very few know that there is difference enough to cause good and bad work.

Blacksmithing Secrets

Blacksmithing Secrets Part 1

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Whether a farmer can afford a forge and anvil will depend upon the distance to a blacksmith shop, the amount of forging and other smithing work he needs to have done, and his ability as a mechanic. Although not every farmer can profitably own blacksmithing equipment, many farmers can. If a farmer cannot, he should remember that a great variety of repairs can be made with the use of only a few simple cold-metal working tools.

Homemade Cheese Press

Homemade Cheese Press

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On the Gies farmstead we occasionally wallow in goat milk. From it we make our own butter, yogurt and cheese as well as drink some. This has prompted me to build a little cheese press to help with the extra milk. The press is made from inexpensive 1/2 inch thick plastic cutting boards used for the top and bottom plates and pressure disks, white pvc pipe, and a plastic floor drain cap.

The Woodfired Bottom-heated Greenhouse Bench

Cultivating Questions: The Woodfired Bottom-heated Greenhouse Bench

It took several incarnations to come up with a satisfactory design for the bottom heated greenhouse bench. In the final version we used two 55 gallon drums welded end-to-end for the firebox and a salvaged piece of 12” stainless steel chimney for the horizontal flue. We learned the hard way that a large firebox and flue are necessary to dissipate the intense heat into the surrounding air chamber and to minimize heat stress on these components.

Audels Gardeners and Growers Guide

How to Store Vegetables

Potatoes may be safely stored in bits on a well drained spot. Spread a layer of straw for the floor. Pile the potatoes in a long, rather than a round pile. Cover the pile with straw or hay a foot deep.

The Milk and Human Kindness Wensleydale Cheese

The Milk and Human Kindness: Wensleydale Cheese

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Like all ancient British cheeses, Wensleydale, a Yorkshire dales cheese was originally a sheep milk cheese. It’s been made for centuries in Yorkshire, shifting from sheep milk to cow milk as cows became more prevalent and more productive, into the 19th century. It is in a circular form, more or less cubic in proportion. Wensleydale is a very classy, delicious vibrant creation when all goes well on cheese making day.

Horseshoeing Part 2C

Horseshoeing Part 2C

The wear of the shoe is caused much less by the weight of the animal’s body than by the rubbing which takes place between the shoe and the earth whenever the foot is placed to the ground and lifted. The wear of the shoe which occurs when the foot is placed on the ground is termed “grounding wear,” and that which occurs while the foot is being lifted from the ground is termed “swinging-off wear.” When a horse travels normally, both kinds of wear are nearly alike, but are very distinct when the paces are abnormal, especially when there is faulty direction of the limbs.

The Craft of the Wheelwright

The Craft of the Wheelwright

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In these days of standardization and the extensive use of metal wheels you might think there is little call for the centuries old craft of wheelwrighting, but the many demands on the skills of Gus Kitson in Suffolk, England, show this to be very far from the truth. Despite many years experience of renovating all types of wagons and wheels even Gus can still be surprised by the types of items for which new or restored wooden wheels are required.

On The Anatomy of Thrift Fat & Slat

On the Anatomy of Thrift Part 3: Fat & Salt

On the Anatomy of Thrift is an instructional series Farmrun created with Farmstead Meatsmith. Their principal intention is instruction in the matters of traditional pork processing. In a broader and more honest context, OAT is a deeply philosophical manifesto on the subject of eating animals. Fat & Salt is the third and final video in the series. It is the conceptual conclusion to the illustrated, narrated story that weaves throughout the entire series, and deals instructionally in the matters of preserving pork.

Build Your Own Butter Churn

Build Your Own Butter Churn

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Fresh butter melting on hot homemade bread… Isn’t that the homesteader’s dream? A cheap two-gallon stock pot from the local chain store got me started in churn building. It was thin stainless steel and cost less than ten bucks. I carted it home wondering what I might find in my junk pile to run the thing. I found an old squirrel cage fan and pulled the little motor to test it. I figure that if it could turn a six-inch fan, it could turn a two-inch impeller.

Small Farmer's Journal

Small Farmer's Journal
PO Box 1627
Sisters, Oregon 97759
800-876-2893
541-549-2064
agrarian@smallfarmersjournal.com
Mon - Thu, 8am - 4pm PDT