Fungus (see below), which are produced by very closely related "Aspergilli". Quorn, a meat substitute, is made from "Fusarium venenatum". Edible mushrooms include commercially raised and wild-harvested fungi. "Agaricus bisporus", sold as button mushrooms when small or Portobello mushrooms when larger, is the most widely cultivated species in the West, used in salads, soups, and many other dishes. Many Asian fungi are commercially grown and have increased in popularity in the West. They are often available fresh in grocery stores and markets, including straw mushrooms ("Volvariella volvacea"), oyster mushrooms ("Pleurotus ostreatus"), shiitakes ("Lentinula edodes"), and enokitake ("Flammulina" spp.). Many other mushroom
American chestnut tree contains enough Chinese chestnut DNA that encodes for systemic resistance genes to resist the blight. This is essential for restoring the American chestnut trees into the Northeast. The Northern Nut Growers Association (NNGA) has also been active in pursuing viable hybrids. From 1962 to 1990, Alfred Szego and other members of the NNGA developed hybrids with Chinese varieties which showed limited resistance. Researchers at the State University of New York College of Environmental Science and Forestry (SUNY ESF), have developed fully blight-resistant transgenic American chestnuts. This was done by inserting a specific gene from wheat, oxalate oxidase, into the