前言 当前世界各主要产棉国家,最常用的棉花选种方法是品种间杂交,继之以对杂种后代培育与选择。目前世界各国栽培的陆地棉和海岛棉品种绝大多数是用这种方法选育而成的。 在应用品种间杂交方法于选种中时,仍有一系列问题有待进一步研究,如怎样加速杂种后代稳定,怎样在后代中加强和稳定人们所需要的性状,怎样在杂交后长时期的选择过程中保持杂种较高的生活力等。 Preface The most commonly used method of cotton selection in all the major cotton-producing countries in the world is crossbreeding among varieties, followed by cultivation and selection of hybrid offspring. At present, the vast majority of cultivated Upland Cotton and Gossypium barbadense in various countries in the world are bred by this method. There are still a series of problems that need to be further studied when applying cross-species hybridization methods, such as how to accelerate the stability of offspring, how to strengthen and stabilize the traits needed by future generations and how to select the long-term selection process after crossbreeding Maintain high hybrid vitality and so on.