论文部分内容阅读
我们地区从1973年到1978年底止,在本地区的主要杉木林区里,应用表型选择法,初选出优树1150株;用这批优树在8个县的14个建园单位(国营林场和县林科所)嫁接了1,001亩种子园,供测定的实存无性系977个。大家知道,表型优树的遗传增益,大约只有10～15％,而具有这种显著遗传增益潜力的优树比例,也仅约有20～25％。如何筛选出这批具有遗传增益的优树,这就成为我们地区在杉木良种选育工作中急待解决的关键问题之一。从1974年起,经过五年来的努力,初步摸索出了优树综合鉴定法。它的基本特点是:以无性鉴定为基础,用有性鉴定相验证。一、鉴定方法杉木优树综合鉴定法包括两部分:无性鉴
In our region from 1973 to the end of 1978, in the main cedar forest area in the region, the phenotype selection method was used to elect 1150 elite trees; using these elite trees in 8 counties in 14 construction units ( State Forestry Farm and County Forestry Branch) grafted 1,001 acres of seed orchard for the determination of the existence of 977 clones. As you know, the genetic gain of phenotypically superior trees is only about 10-15%, and the proportion of elite trees with this significant potential for genetic gain is only about 20-25%. How to screen out these excellent trees with genetic gain has become one of the key problems to be solved urgently in the breeding of Chinese fir seed in our region. From 1974 onwards, after five years of hard work, initially found out the excellent tree comprehensive appraisal method. Its basic features are: asexual identification as the basis, with sexual identification phase verification. First, the identification method Cunninghamia lanceolata comprehensive identification method includes two parts: no information