浙皱-7号等三个千年桐无性系的选育及高产无性系示范推广

该研究首次报道了我国千年桐在北缘产区,由实生造林发展为无性栽培的途径。通过有性起源的优株无性系化,无性系测定,在13个无性系间选育出浙皱-7号、浙皱-9号、浙皱-8号3个高产优良无性系,表现出早实丰产特点,其中浙皱-7号达到了最高产量的水平。通过研究与生产检验,证明了千年桐高产无性系选择育种程序是科学的、可行的。试验采用边测定、边示范,逐步推广的技术路线,应用快速育苗繁殖技术,使高产无性系推广面积达53 960亩。

BREEDING OF HIGH-YIELDING CLONES OF WOODOIL TREE AND THEIR EXTENSION

As a result of the studies, we found a way to cultivate woodoil trees in northern areas and to establish the economic plantation of clones instead of seedling afforestation. Through breeding the clones from elits trees and their selection, three high-yielding clones out of the 13 selected were finally determined. They were labeled as Zhezhou No. 7, Zhezhou No. 9, Zhezhou No. 8. The first one was the best because of its high yield and early maturity. It was proved in our practice that the breeding of high-yielding clones of woodoil tree is not only scientifically reasonable, but also feasible. We carried out the studies, selection, determination and demonstration simultaneously, and extended the results gradually. Now the extension area has reached 53 960 mu where the quick-propagating techniques and high-yielding clones are being used successfully.