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一、研究的目的和意义落叶松属内种间杂交具有杂种优势,这已是林木育种工作者较为普遍的认识,也有不少实例。但怎样更好地组合杂种优势?能否预测这种优势?以及怎样在生产上利用这种优势仍然是目前急需解决的问题。我们自1975年以来探讨了这个问题。二、试验材料和方法 (一) 试验材料为了寻求杂种优势表现的规律性,我们取用种子园中的兴安落叶松和日本落叶松各9个无性系父、母本,并在当地和辽宁省抚顺矿务局和睦林场选择优树和优势木27株只做
First, the purpose and significance of research Interspecific hybridization within the larch has heterosis, which is more common knowledge of forest breeding workers, there are many examples. But how to better combine heterosis? Whether can predict this advantage? And how to take advantage of this advantage in production is still an urgent problem to be solved. We have explored this issue since 1975. Test Materials and Methods (I) Test Materials In order to seek the regularity of the performance of heterosis, we took 9 clones of each of the two clones, Larix gmelinii and Larix kaempferi, in the seed garden and local and Liaoning provinces Fushun Bureau of Mines and Forest Farm selection superior trees and superior wood 27 only do