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近年来,随着杨树人工林面积的迅速扩大,杨树病虫害的危害面积和程度也日趋扩大和加重。当前,对病虫害大多采用药物防治,造成了环境污染。因此,减少病虫害最好的方法还是选育抗病虫害的优良个体。于是,我们从1983年开始了杨树抗性选优工作。一、选优材料、标准和方法(一)选优材料我们认为,选择新的抗源以天然或人工起源的实生后代林为好。尤其是几种杨树混生的林分内,基因资源较多,种子遗传基础复杂,其杂种具有广泛的代表性。我们在黑龙江和辽
In recent years, with the rapid expansion of plantation area of poplar, poplar pests and diseases damage area and extent are also growing and aggravating. At present, most of the pest diseases are controlled by drugs, causing environmental pollution. Therefore, the best way to reduce pests and diseases is to select good individuals that are resistant to pests and diseases. So, we started the poplar resistance selection work in 1983. First, the selection of materials, standards and methods (A) selection of materials We believe that the selection of new sources of natural or artificial origin of offspring progenitors as well. In particular, there are several kinds of poplar mixed forest, more genetic resources, the genetic basis of the complex seed, the hybrid has a wide range of representation. We are in Heilongjiang and Liao