正确选用亲本材料是杂交育种取得成功的关键性的第一步.随着现代化农业技术的发展,大规模地推广良种,使许多地方品种从生产中消失,遗传资源丧失.现代育种工作已明显感到遗传基础日益贫乏的危机.刘大钧认为:“基因资源的局限性与单一化所造成的遗传脆弱性和育种效率滞缓的教训,已经屡见不鲜.”我国目前收集、保存和利用的棉花种质资源都是从国外引进的,或者是从引进品种中选育而成的品种,加之长时期地按一定目标的人工选择,最后选留的也总是具有特定综合性状的相对一致的群体.在杂交育种的 Proper selection of parental materials is a crucial first step in the success of crossbreeding. With the development of modern agricultural technology, large-scale popularization of good varieties has led to the loss of many local varieties from production and the loss of genetic resources. Genetic base is increasingly scarce crisis.Liu Dajun said: “genetic resources limitations and single genetic damage caused by the slow and breeding efficiency of the lesson has not been uncommon.” China’s current collection, preservation and utilization of cotton germplasm resources are Is introduced from abroad, or from the introduction of varieties of breed varieties, coupled with a long time according to a certain goal of artificial selection, the last selection is always with the specific characteristics of a relatively consistent group.In hybrid breeding of