Explores the breeding programs for the button mushroom in the context of the wide range of edible mushrooms now being cultivated worldwide. The 15 papers, from a UNESCO workshop in Hong Kong, July 1991, discuss topics such as the background and general objectives of culture collection and breeding, the genetic systems, and biological approaches to breeding. In addition to providing foodstuffs, the applications include producing high-value fungal metabolites and upgrading lignocellulosic wastes, and wastewater treatment. Annotation copyright by Book News, Inc., Portland, OR