July/August 2019 - 13
Protect Your
The WiÑay variety, designed with Peru's highland fields in mind,
is frost-resistant to 14 degrees Fahrenheit and can be grown at
elevations up to 14,000 feet. Photos: Bill Schaefer
A
partnership between researchers from the University
of Wisconsin-Madison and Peru have developed a new
frost-resistant potato variety.
John Bamberg, Alfonso del Rio and Jiwan Palta from
UW-Madison collaborated with researchers from Peru's
International Potato Center and the Instituto Nacional de
Innovacion Agraria (INIA) and Peruvian growers to develop
the Wiñay. The variety will be used by Peruvian farmers in the
land that gave the world the potato.
Wiñay means " to grow " in Quechua, one of Peru's indigenous
languages.
The frost-resistant potato is long and thin with brown
skin and yellow flesh and it's grown for Peru's fresh market.
It was developed to be cultivated in Peru's Altiplano region at
elevations up to 14,000 feet above sea level.
Palta, a professor of horticulture and plant physiologist
with the Plant Breeding and Plant Genetics program, said
that many of the wild potato varieties found in the Altiplano
are naturally hardy and can tolerate temperatures down to 14
degrees Fahrenheit. However, these potatoes are small and
have a bitter taste due to high levels of chemical compounds
called glycoalkaloids.
The need for a hardier, less bitter, frost-resistant potato in
Peru's highlands stems in part from climate change, according
to both Palta and del Rio, a senior scientist in charge of the
U.S. Potato Genebank research lab at UW. According to Palta
and del Rio more frequent late-season killing frosts are causing
greater yield losses for Peru's farmers.
However, developing a new potato variety to withstand such
conditions is a time-consuming project, one that typically
requires 10 to 15 years to bring to fruition. The devil can be in
the genetic details when crossing potato varieties to develop a
new variety.
Bamberg, director of the USDA Agricultural Research
Service's U.S. Potato Genebank in Sturgeon Bay, Wisconsin,
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Spudman * July/August 2019
13
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July/August 2019
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