All over the world local varieties of fruit, vegetables and grain are grown. Many are seemingly forgotten

or are underutilized despite having outstanding nutritional or taste qualities. (...)

The article:
http://www.fao.org/traditional-crops/en/

More about:
http://www.tropicalforestnetwork.com/biodiversity-01.html
http://www.ciatnews.cgiar.org/2014/09/01/visualizing-evolving-global-diets/

http://video.ilsole24ore.com/TMNews/2014/20141021_video_14150358/00025680-in-mali-i-miracoli-dellagricoltura-tradizionale-africana.php

Informazione di base:
http://en.wikipedia.org/wiki/Crop_diversity
http://fr.wikipedia.org/wiki/Diversit%C3%A9_des_plantes_cultiv%C3%A9es

Passato... futuro?:
https://www.fabiomanzione.it/index.php?option=com_content&view=article&id=5657:neglected-crops-why-it-is-critical-we-increase-food-diversity&catid=117:agricoltura&Itemid=103