现今世界各主要产棉国都很重视棉花品种资源的征集、研究、利用。美国的棉花引种和品种资源工作由马里兰州农业科学研究中心负责。针对国外情况和国内育种需要有针对性地组织专门考察搜集。国家种质库现存活品种数7万2千多份。其中棉花部份由棉花室负责,经常提供原始材料目录,报导世界各种棉花种、品种类型的性状指标,提供各育种单位选用。美国棉花品种工作者近20年来收集了约1000株原始野生“庭院”棉进行遮光处理、分类编目等研究,因而培育新品种的效率较高。苏联由植物栽培研究所中亚分所和塔什干棉花选种良种繁育研究所广泛收集世 The world’s major cotton producing countries attach great importance to the collection, research and utilization of cotton varieties. The United States cotton introduction and variety resources by the Maryland Agricultural Science Research Center. In view of the situation in foreign countries and the need for domestic breeding, we specially organize and inspect the collection. The National Germplasm Bank currently stocks more than 72,000 varieties. Cotton is partly responsible for the cotton room, often provide the catalog of raw materials, covering all kinds of cotton varieties and traits in the world, and provide the selection of breeding units. In the past 20 years, the US cotton variety workers collected about 1000 original wild “garden” cottons for research on light-shielding treatment, cataloging and so on, so that it is more efficient to cultivate new varieties. The Soviet Union by the Institute of Plant Cultivation Central Asia branch and Tashkent cotton variety breeding Institute widely collected