以八年生54个杉木自由授粉家系为研究材料,分析了杉木主要经济性状在家系间的差异,以及杉木数量性状的遗传变异、遗传相关,进一步为杉木遗传改良提供了证据。运用指数选择法,就生长和形质两个方面综合评定了杉木家系表现,评选出了16个速生优质的杉木家系,供生产实践上推广应用。 Based on the data of 54 free pollinated Chinese fir families with 8-year-old population, the differences of the main economic traits in Chinese fir and the genetic variation of the quantitative traits in Chinese fir were analyzed. The results provided further evidence for genetic improvement of Cunninghamia lanceolata. Using index selection method, we comprehensively evaluated the performance of Chinese fir family on both growth and quality aspects, and selected 16 fast-growing, high-quality Chinese fir families for their practical application.