They are the most important cultivated varieties. Lesser yam ( D. esculenta ), grown on the subcontinent of India, in southern Vietnam, and on South Pacific islands, is one of the tastiest yams. Yams are native to warmer regions of both hemispheres, and several species are cultivated as staple food crops in the tropics. There are several different varieties of the carbohydrate rich tubers, which are of West African origin.

belongs to the family Dioscoreaceae, genus Dioscorea.

It is also known as white Guinea yam, Guinea yam, and 8-months’ yam. D. rotundata, a cultigen, is so close to D. cayenensis that it … Chinese yam…. White yam (Dioscorea rotundata L.) is a native of West Africa; while Chinese/lesser yam (Dioscorea esculenta L.) could be of Burma or Indo-China in origin (Mohankumar et al., … Guinea yam ( D. rotundata) and yellow Guinea yam ( D. cayenensis) are the main yam species grown in West Africa. The most popular species are white yam (Dioscorea rotundata) and yello yam (Dioscorea cayenensis), which are native to Africa. White yam (Dioscorea rotundata) IMPORTANT INFORMATION : This datasheet is pending revision and updating; its contents are currently derived from FAO's Animal Feed Resources Information System (1991-2002) and from Bo Göhl's Tropical Feeds (1976-1982). White yam ( Dioscorea rotundata Poir.) The center of origin of white yam is in West Africa. Yam, any of several plant species of the genus Dioscorea (family Dioscoreaceae) grown for their edible tubers.

History of Introduction and Spread Top of page D. alata was apparently introduced to the Americas by Portuguese and Spanish slave traders in the 1500s ( Coursey, 1967 ). These perennial herbaceous vines are cultivated across Africa, Asia, Latin America, the Caribbean and Oceania.

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