Preliminary Study on Crossing Combination Reselection of Chinese Fir for the Southern Area of Zhejiang Province

4 testing plantations of full-sibs of Chinese fir set up in two sites of Zhejiang and Jiangxi before 1980 's were investigated, and their trial data were analysed. Some better crossing combinations were evaluated. The controlled crossing of these combinations were gained by artificial pollination. Regional afforestation experiments were conducted. By analysis on testing plantation data of 17 crossing combinations of Chinese fir at 3 ages, genetic variation, genetic relationship and other parameters in total height, diameter at the base, round numbers, the crown of tree and survival rate were studied. According to comprehensive selection index, three good and outstanding crossing combinations were obtained:9702,9706 and 9703. Their genetic gains were very obvious: height 9.18% ; diameter at the base 7. 07% ; round numbers 2.81% ; the crown of tree 7. 73% and survival rate 1. 24% . They were worth to be popularized in the Southern area of Zhejiang Province.