所有植物育种的先决条件之一是遗传变异。随着瓦维洛夫著作的出版,所谓起源中心或资源中心(Centres of Diversification)的存在及大多数植物种的巨大变异已为众所周知。虽然植物育种家们,(主要是美洲的育种家)开始利用了这些自然资源,但并未对当地的资源进行保护。更重要的是未能拯救现存的濒于丢失的遗传资源。由于农业生产方法的改 One of the prerequisites for all plant breeding is genetic variation. With the publication of Vavilov’s writings, the existence of so-called Centers of Diversification and the tremendous variation in most plant species is well known. Although plant breeders, predominantly American breeders, began using these natural resources, they did not protect the local resources. What is even more important is the failure to save the existing genetic resources that are on the brink of loss. Due to the change of agricultural production methods