毛白杨良种繁殖技术研究进展

Research Progress on Propagation Technology of Improved Varieties of Populus tomentosa

以毛白杨为研究对象,指出了无性繁殖生根困难、无性繁殖过程的品种退化是毛白杨良种繁殖技术中应考虑的主要问题,论述了3种毛白杨良种繁殖技术体系(多圃配套系列育苗技术、毛白杨根蘖苗幼化及扦插育苗配套技术、毛白杨离体组织培养快繁技术),对毛白杨良种繁殖技术进行了展望,认为将组织培养技术生产的幼化种苗与硬枝扦插技术相结合,构建组培—硬枝扦插扩繁技术体系,既能保证苗木质量和繁殖效率,还能显著地削减育苗成本,是毛白杨良种繁殖的主要途径。

Taking Populus tomentosa as the object, this article points out that the difficulty of rooting in asexual propagation and the variety degradation in asexual propagation process are two main problems that should be considered in the propagation technology of improved Populus tomentosa,and discusses the propagation technology systems of three improved Populus tomentosa(multi nursery supporting series seedling technology, Populus tomentosa root tiller seedling juvenile and cutting seedling supporting technology, Populus tomentosa tissue culture and rapid propagation technology in vitro).The propagation technology of improved varieties of Populus tomentosa is prospected.It is considered that the main way of improved varieties of Populus tomentosa is to combine the young seedlings produced by tissue culture technology with hard branch cutting technology and construct the tissue culture hard branch cutting propagation technology system, which can not only ensure the seedling quality and propagation efficiency, but also significantly reduce the seedling cost.