摘要：The preliminary assessment of progeny test in a seed orchard of Eucalyptus globulus *** at Yipinglang State Farm of Yunnan Province in China was *** trial was composed of 21 replications,with 2 trees on each plot,15 plots in each incomplete block,and 18 incomplete blocks in each replication,laid out in a α-design of 270 open-pollinated *** families were of three categories (natural populations,local land race and seed orchard).They were further subdivided into 11 *** data from an assessment of growth,stem form and other characteristics of the young trees after being planted 2 years were *** are as follows:the different categories differed significantly in their growth,with the families from seed orchards being the *** also differed significantly in their *** families from the regions of Westem Victoria,Eastern Victoria and all three seed orchards were better than *** tamilies from Yunnan had the best frost tolerant and its survival was the *** growth,stem form and fungal tolerance,the families from Yunnan were similar to that from Southern Tasmania and Eastem ***-tree plots were strongly recommended over singletree plot designs for large-scale progeny trials.