杉木第1代改良种子园无性系多性状综合选择

采用主成分回归分析对杉木无性系多性状进行综合选择，评选出子代生长快，无性系结实量多，产量稳定，抗性强，当代生长也快，综合性状优良的无性系，可用于重建第１代生产性改良种子园。其种子产量的遗传增益为１５０．３９％，无性系当代材积比平均生长快３３．８１％，子代高比平均生长快８．０７％。

Comprehensive Clonal Multi character Selection for First Generation Improved Seed Orchard of Chinese Fir.

Using principal component analysis,the fast growing clones with high and stable seed production,and great resistance of the filial generations were selected as materials of the first generation improved orchard,which obtained genetic gain of 150 39%,ad increased the volume growth rate of the frecent generation by 33 81%,and height growth rate of the filial generation by 8 07%.