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对广东省于１９９３～１９９４年营造的１２块杉木无性系测定林的３～４年生材料进行分析，结果显示：有２／３以上的试验林的生长性状方差分析结果达到较显著差异水平以上，最优无性系的树高为最劣无性系的１．６４倍～３．３３倍，表明这些试验林中的无性系间存在着显著的遗传差异，且优、劣无性系间生长差异极为悬殊；经综合评选，从１１３１个参试无性系中，初步筛选出１０３个优良无性系，其平均树高增益达１３．９８％，其中ＧＤＬ２００１等３５个无性系表现较为突出，其平均树高增益达２１．７０％，近期应当重点收集与大量繁殖；试验结果进一步验证，在优良种源的优良家系中进行杉木优良无性系选育，其选择效果最佳。
The results of the analysis of 3 to 4 year-old materials of 12 Chinese fir clonal plantations dating from 1993 to 1994 showed that more than two-thirds of the experimental plantation’s ANOVA results reached more significant differences, The tree height of the best clones was 1.64 times to 3.33 times of the poorest clones, indicating that there was a significant genetic difference among clones in these experimental forests, and the differences in growth between excellent and poor clones were extremely different Among the 1131 clones tested, 103 excellent clones were initially screened, with an average tree height gain of 13.98%. Among them, 35 clones, such as GDL2001, had outstanding climatic performance, and the average tree height gain Up to 21.70%, the recent should focus on the collection and mass reproduction; test results further validation, elite provenance in good families clonal breeding, the best choice.