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表型选择结合无性系筛选,是在一个有性世代中提高选择效果的一种有效方法。杉木无性系筛选,通过嫁接繁殖方法,将所选择的杉木无性系集中于一地,进行相互比较,选出最适应于本地区的优良无性系,缩小子代鉴定的组合和规模,有利于缩小环境差异,判明立地条件差异对优树的影响,估量所研究的杉木基因型,选出最好的无性系用营养繁殖的方法直接投入生产。一句话,有利于优中选优,加速良种繁育过程。杉木无性系筛选应尽可能地缩小环境因素不同而造成的影响,如筛选区的立地条件(土
Phenotypic selection in combination with clonal screening is an effective way to improve selection in a sexual generation. Cunninghamia lanceolata clones were screened. The selected clones of Cunninghamia lanceolata were selected and compared with each other by grafting and propagation method, and the best clone adapted to the region was selected to narrow the combination and scale of progeny identification, Environmental differences, to determine the site conditions differences on the tree to assess the Cunninghamia lanceolata genotypes studied, select the best clones with the method of vegetative propagation directly into production. In a word, it will help optimize the selection of superior and accelerate the breeding process. Cunninghamia lanceolata clonal screening should be as much as possible to reduce the impact of environmental factors, such as screening area site conditions (soil