欧美杨新品种(46杨、28杨)的选育研究

Study on the Selection of New Cultivars(46,28)of Topola Canadsca

该研究遵循严格的育种程序,历时10年,通过人工授粉杂交,从近万株杂种苗中经过苗期选择及无性系比较测定与选择、选育出两个欧美杨新品种。该品种成活率高,较耐干旱瘠薄,生长期比原推广种沙兰杨长15—30d,主干通直圆满、顶端优势强,分枝角度小、侧枝细而多,生长快,材积超过沙兰杨30%以上,超过最新引进种露伊莎杨10%以上,而且材质优于沙兰杨和露伊莎杨,抗病虫能力较强。适合在我省中、北部平原地区推广栽植。

Through ten years,two new cultivars of topola canadsca wereselected by using the breeding procedure of artificial hybridization,seedlingstage selection and clone comparison measurement from among ten—thousandhybrid seedlings.They are tolerant to drought and hunger with high survivalrate.The growing period of the new cultivars is 15—30 days longer than thatof Populus×euramericana cv.“Sacrau79”,a formerly spread variety.Theygrow fast and have a straight and round central trunk,strong apical domina-nce,slight ramiferous angles and many slender lateral branches.The stem vo-lume of the new cultivars is thirty percent more than that of Populus×eur-americana cv.“Sacrau79”and ten percent more than that of Populus eur“Lui-sa Avanzo”.Their growing speed,wood quality and pest—resistivity areall superior to the other ones mentioned above.The new Cultivars(46,28)areadapted to be spread in the plain areas of Henan Province.