原始材料是育种工作的基础,只有占有大量的原始材料和对原始材料进行过系统的、深入的研究,才能正确的开展育种工作,并取得予期的效果。本文就原始材料研究中的几个问题谈一些看法,不妥之处请批评指正。一、原始材料分类学的研究研究原始材料时,首先要搞清它的分类学地位。对于原产我国的杨树分类学的研究是比较清楚的,但对从国外引进的杨树,特别是五十年代以来从国外引进的杨树分类学的研究则较少,问题也较多。从我们对陕西及其它地区国外引进杨树的分类、起源和分 Raw materials are the basis of breeding work. Only with a large amount of raw materials and systematic and in-depth research on raw materials can we carry out breeding work correctly and achieve the desired results. This article on some issues in the study of raw materials to talk about some of the comments, please correct me wrong. First, the study of the original material taxonomy Research on the original material, we must first find out its taxonomic status. The research on the poplar taxonomy originated from China is relatively clear, but the research on the poplar taxonomy introduced from abroad since the 1950s is less and more problematic. From our introduction of poplar species in Shaanxi and other regions, origin and points