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一、前言白杨派杨树多数耐寒、耐旱、适应温差大和干燥的大陆性气候,是我国西部干旱、半干旱地区造林的优良树种。但是大多数白杨类结实困难,不易扦插成活。为此,我们自1973年以来,开展了白杨派的杂交育种工作,以便利用杂交优势,掌握遗传规律,培育易扦插、抗性强、生长快的优良品种。二、试验材料及方法以银白杨(银)、河北杨(河)、山杨(山)、毛白杨(毛)、新疆杨(新)等为亲本,进行种间杂交。其组合为银×新、银×毛、银×河、银×山、山×新,山×毛、山×河,河×新、河×银、河×山等。
I. Introduction Poplar Poplar most of the cold hardy, drought-tolerant, to adapt to large and dry temperature of the continental climate, is the west of arid and semi-arid areas afforestation fine tree species. However, most Poplar strong, difficult to cuttings survive. To this end, since 1973, we have carried out the crossbreeding work of Poplar to take advantage of the hybrids, master the genetic laws, and cultivate fine varieties that are easy to cut, strong resistant and fast growing. Test materials and methods Interspecific hybridization was carried out with poplar (silver), Hebei Yang (river), aspen (mountain), white poplar (wool), Xinjiang (new) as the parent. The combination of silver × new, silver × hair, silver × river, silver × mountain, mountain × new, mountain × hair, mountain × river, river × new, river × silver, river × mountains.