【摘要】 本文以群众杨、合作杨为对照,对以I-69、欧洲黑杨、美洲黑杨、小叶杨、箭黑杨、青杨等为亲本的23个杂种无性系,进行了生长性状和材性性状分析。各无性系的树高、胸径、材积均差异极显著。6-7年生树高和胸径的遗传力均很高。随着树龄的增大,生长性状的遗传力增大,受较强的遗传力的控制。各无性系间木材密度差异极显著,最大者较对照群众杨提高了23.5%,无性系间纤维长度差异极显著。ZJ-2和ZJ-10较对照群众杨高出10.9%,通过综合评分法,从23个无性系中,选出6个无性系,分别为:ZJ-7、ZJ-2、ZJ-3、ZJ-10、ZS-8和L910-140。这几个无性系生长性状和材性性状均优良,可以与群众杨、合作杨等品种平行推广应用。更多还原

【Abstract】 Taking Populus popularis and P.opera as controls,the growth and timber characteristics of the 23 cross-breeding varieties,which used.Populus I-69,P.deltoids,P.nigra,P.simonii,P.nigra var thevestina × P.nigra and P.cathayana as parents have been analyzed genetically in the thesis.The height(H),diameter at breast height(DBH) and timber volume between the clones were significantly different.The hereditary capacities(HC) of tree height and DBH of all the clones at ages from 6 to 7 were high,the hereditary capacities of the growth characteristics increased with the age,i.e.it controlled by the HC strongly.There were significant differences of the timber density between the clones.Among them the biggest one,comparing with P.poplaris increased to 23.5% and the fiber length between the clones were different significantly,among them the Zj-2 and Zj 10’s fiber length were improved 10.9% comparing to the P.popularis.Through an integrated analysis,6 clones,ZJ-7,ZJ-2,ZJ-3,ZJ-10,ZS-8 and L910-140 were selected out from 23 clones.Both growth and timber characteristics of the 6 clones selected were good,therefore they can be extended and applied in the practice with poplar varieties of P.popularis and P.nigra simultaneously.更多还原