As 2007 winds down, thoughts naturally turn towards what might lie ahead. Meals rich in high-carb tubers, perhaps? That's what the United Nations would like everyone to contemplate throughout 2008, which it is designating the International Year of the Potato.
Farmers now harvest more than 300 million tons of potatoes (Solanum tuberosum) worldwide. That makes it the fourth biggest food crop, trailing only corn, wheat, and rice.
For 8,000 years, the humble potato has been a staple in the South American Andes, its homeland. Spanish adventurers encountered the New World crop roughly 500 years ago and brought various types back to Europe. Today, potatoes are cultivated not only throughout the Americas, but also from China's uplands to India's subtropical lowlands—even on Ukraine's arid steppes.
A testament to the potato's Western roots, production of this crop in the States and southward leads the world. Fully 40 percent of the 2006 potato harvest came from North America, with Latin American farmers contributing another 16 percent.
However, appreciation for this nutritious starch within developing countries outside of the Americas—especially in Asia—has been growing steadily, with production of the crop in those regions climbing some 5 percent annually. Indeed, 2005 marked the first time in recent history that production of potatoes in the developing world exceeded that in developed nations.
Although most people think of potatoes as a commodity, in fact, more potatoes are processed to make fast foods, snacks, and convenience items than are sold fresh in the market place. Today, China is the leading producer of spuds, followed by the Russian states and India. International trade in potatoes—worth $6 billion annually—has also been growing within developing nations.
You might then ask why, with all of this pre-existing global interest in potatoes, the UN feels compelled to devote a year of workshops, research contests, and other focused attention on this one particular food. And the reason, the UN's Food and Agricultural Organization argues, is that much of the spud's potential to feed the poor remains untapped.
For instance, although Asians eat nearly half of the world's potatoes, per capita consumption even in Asia remains modest—just 25 kilograms per year, or roughly 45 percent of U.S. consumption and just 27 percent of what's typical in Europe.
Even were potatoes to win greater respect for their nutritional attributes and ability to serve as industrial feedstocks, they couldn't necessarily make a big contribution in new regions of the world without significantly more research. The tubers are vulnerable to a host of major diseases—like the one that set off Ireland's 1845 potato famine. Some varieties of potato are especially resistant to particular diseases, but may not grow well in new regions of the world or taste that yummy.
That's where potato scientists come in. They can identify the climate, soil types, day length, and native diseases with which any new potato crop would have to contend. Then they'll cross lines of wild or cultivated spuds to develop ones with traits that will allow them to thrive outside the Americas. The good news, the UN program notes: "The potato has the richest genetic diversity of any cultivated plant." So there's plenty of potential to tailor a new cultivar to meet the needs of farmers in most places on the globe.
But the potato's biggest advantage, according to the International Potato Center, based in Lima, Peru, is that it yields more food, more quickly, on less land, and in harsher climates than any other major crop. Up to 85 percent of the plant is edible, compared to only about 50 percent for cereal grains. Moreover, the Center notes, potatoes "are ideally suited to places where land is limited and labor is abundant—conditions in much of the developing world."
To help get this word out to agricultural agencies in parts of the world not already turned on to spuds, and from them to farmers, the International Potato Center will be sponsoring a March 2008 meeting: Potato Science for the Poor–Challenges for the New Millennium (http://www.cipotato.org/Cuzco_conference/). Those who attend will have the opportunity to explore the possibility of cooperating to fine tune existing potatoes into higher-yielding varieties.
The International Potato Center's gene bank safeguards the largest biodiversity of potatoes—7,500 different varieties, of which 1,950 are not cultivated. Research on spuds, especially studies aimed at fostering food security and the alleviation of poverty, have become a focus for the center.
With all of this talk of potatoes, are you hungry yet? The UN program has so far identified 172,000 web pages containing recipes for using potatoes. Stay tuned, it says: "We will gather the best of them" and share them on the Year of the Potato website.
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International Year of Potato (IYP) Secretariat
Food and Agriculture Organization of the United Nations
Viale delle Terme di Caracalla
International Potato Center
Apartado Postal 1558
Gorman, J. 2000. Novel sensing system catches the dud spud. Science News 158(Nov. 25):341. Available at [Go to].
C. Graves, Ed. 2001. The Potato, Treasure of the Andes: From Agriculture to Culture. Lima, Peru: International Potato Center (208 pp). Available at [Go to].
Raloff, J. 2005. Food colorings: Pigments make fruits and veggies extra healthful. Science News 167(Jan. 8):27. Available at [Go to].
______. 2004. How carbs can make burgers safer. Science News Online (Dec. 4). Available at [Go to].
______. 2004. Coming soon—Spud lite. Science News Online (June 19). Available at [Go to].
______. 2003. How olives might enhance potatoes—and strawberries. Science News Online (May 24). Available at [Go to].
______. 2002. Acrylamide—From spuds to gingerbread. Science News Online (Dec. 14). Available at [Go to].
______. 1998. Taters for tots provide an edible vaccine. Science News 153(March 7):149. Available at [Go to]
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