美国一批科学家建立“美国板栗基金会”(ACF),在基金会的资助下,板栗育种工作正积极展开。本世纪初板栗在美国曾盛极一时,阿巴拉契安山区每四株阔叶树中就有一株板栗。50年代从欧洲传进的栗枯萎病肆虐全国,被毁板栗林总面积达900万英亩。60年代以来, A group of scientists from the United States established the “American Chestnut Foundation” (ACF). Chestnut breeding work is now under way with funding from the Foundation. Chestnut had flourished in the United States at the beginning of this century, and there was one chestnut in every four broad-leaved trees in Appalachian Mountains. The chestnut blight spread from Europe in the 1950s raged across the country, with a total area of ​​9 million acres of chestnut forests destroyed. Since the 1960s,