一、引言利用选出的杉木优树或优良林分中的优势木,建立杉木种子园,在生产上获得较大的遗传增益。目前,在选优工作中,大都是根据宏观的表型来选择,因而要将初选出的杉木优树经过较长时间的子代鉴定,或几年时间的当代无性系鉴定后,再行建园。这与尽快地实现林木良种化的要求很不适应。同时,杉木的数量指标和表型受外界生态环境的影响很大,不稳定,反映在遗传性上的不可靠性,特别是由于优树的误选,若不鉴定,在人力、物力、财力 I. INTRODUCTION The use of selected superior tree or good stands in the superior wood, the establishment of Chinese fir seed orchard, access to greater genetic gain in production. At present, in the selection and optimization of work, most are based on the macro-phenotype to choose, so to be elected primary tree fir after a long time offspring identification, or a few years of contemporary cloning identification, and then Build garden. This is incompatible with the requirement of quick tree planting. At the same time, the quantitative index and phenotype of Chinese fir are greatly affected by the external environment. It is unstable and is reflected in the unreliability of heredity. Especially, due to the wrong selection of the superior tree, if not identified, the population, resources and financial resources