引种欧洲黑杨无性系苗期生长测定与选择

对引进的59个欧洲黑杨无性系苗期生长性状进行了测定。结果表明,无性系间苗高和地径表现出极显著差异,具有较丰富的遗传变异基础。无性系苗高广义遗传力为84.79%,遗传变异系数为10.55%;地径广义遗传力为79.22%,遗传变异系数为11.8%。以苗高、地径年生长量为指标,应用多性状综合评价法,选出表现好的欧洲黑杨无性系13个,其苗高遗传增益为12.3%,地径遗传增益为12.2%,其中的N8,N51,N48表现特别突出,综合评比超过或接近参照种欧美杨107号,如果选择这3个无性系,则苗高遗传增益可达18.5%,地径遗传增益可达23.5%。

Growth determination and selection of introduced Populus nigre clones in seedling stage

Growth character of 59 Populus nigre clone in seedling stage is determined.Results show that seedling height and collar diameter among clones has significant correlation,and plentiful base of genetic variation.Parameter estimation of quantitative inheritance showed,broad heritability of seedling height of clones is 84.79%,genetic variation coefficient is 10.55%,broad heritability of collar diameter is 79.22%,genetic variation coefficient is 11.8%.13 Clones of PN is selected by method of comprehensive multi-character evaluation,when seedling height and growth quantity of collar diameter are viewed as indice.The genetic gain of seedling height is 12.3%,and 12.2% of collar diameter. The behaviors of N8,N51,and N48 are prominent and their synthetic determination exceeds or approaches the reference species,P.euramericana.If the above 3 clones are selected the genetic gain of seedling height will reach 18.5%,and 23.5% of collar diameter.