4755-2、W-38号杨是以银白杨(Populusalba L.)为母本新疆杨(P.alba L.cv.`Py-ramidalis’)为父本,由我所经人工杂交选育而成的两个优良无性系。经过十余年的育苗、造林观察,表现出明显的杂种优势及超亲优势。白杨派的树种一般扦插繁殖较难生根,而新育成的这两个无性系,动摇了亲本难生根的遗传特性,扦插极易生根,扦插成活率大大超过亲本。由于它们具有生根快、根系发达,表现出良好的速生特性。目前这两个无性系已在我自治区黄河灌区推广,深受群众欢迎。为了进一步探索该品种对环境的适应性,近年来我们对这两个无性系在解剖结构方面进行了一些研究。 4755-2 and W-38 were parents of P.alba L.cv.`Py-ramidalis`, which was popularized by artificial crosses of Populus alba (Populus alba L.) Into two excellent clones. After more than ten years of nursery, afforestation observation, showed obvious heterosis and super-parents advantage. Poplar tree species are generally more difficult to cuttings rooting, and newly bred these two clones, shake the genetic characteristics of hard-rooted parents, cuttings easily rooted, cuttings survival rate greatly exceeded the parents. Because of their fast rooting and well-developed root system, they show good fast-growing characteristics. At present, these two clones have been popularized in the Yellow River Irrigation District in our autonomous region and are well received by the masses. In order to further explore the variety adaptability to the environment, in recent years, we conducted some researches on the anatomy of these two clones.