| Wide range provenance and provenance /family trails of Cinnamomum comphora (L.)Presl were carried out at 4 sites located at the middle and lower reaches of Yangtze River with over 50 provenances and 180 families at different tests. At first ,the traits of seeds were analyzed with the clustering analysis and the provenances classified. Provenance and family variation of growth, adaptation, and genetic satability were analyzed at the stage of seedling and plantation. Genetic diversity and relationship were discussed based on the data of PCR-RAPD analysis. At last, the provenances were classified and the best provenances, families and trees were selected also. The major results were as follows.1. The seed characters of C. comphora, such as length, width, high, weight , 100 seeds weight were investigated for 47 locations. The results show that seed characters and seedling survival percent in the field having significant variation among locations. According to the correlation analysis for the seed traits with the stands environment and seedling growth traits, the close relation were found between seed size and longtitude, between seed shade and height of seedling. According to The cluster analysis for the 7 seed trait means of locations, the natural range of C. comphora could be divided into 6 districts.2. The provenance test at seedling stage was carried out at the nursery of Changle Forestry Farm in Yuhan city, Zhejiang province in 1997 with the 50 provenance seeds collected from the distribution area of C. comphora in 1996. Seedling Biomass and relative traits on the test were observed and the relationship among traits was analyzed with variance analysis, relationship analysis, progressive regression analysis and comprehensive index selection. The results show that there is extreme significant difference on the seedling biomass among provenances and there is extreme significant relationship among 9 traits including seedling height and seedling ground diameter, in which the ground diameter is a leading factor related to the seedling total biomass. Also, five best superior provenances are selected with the comprehensive index selection.3. Growth variance and character analysis of C. camphor a seedling from different provenances: The research is carried out based on the observation data of 8 traits of 10 C. camphora provenances, represented total distribution area of the tree , from test with 60 provenances by the methods of variance analysis, relationship analysis and progressive122regression analysis. The results show that there is significant difference for different traits among provenances; there is extreme significant relationship among 7 traits including seedling growth and ground diameter and the latter is leading factor which has tightest relationship with total biomass at seedling stage.4. The research on provenance /family test shows that there is genetic variation on provenance level and family level. The genetic variation of seedling height, branching height, freeze injury value is much greater on provenance level than that on family level, and the contrary for ground diameter trait on family level. The variance analysis shows there is extreme significant difference in seedling height, ground diameter, branching height, freeze injury value among provenances; there is significant difference in seedling height, ground diameter and freeze injury value and no significant difference in branching height among families, and there is no significant difference for many traits among families within provenance. There are 128, 95, 88, 108 families with higher value and 56, 86, 93, 73 families with lower value compared to Fuyang provenance in seedling height, ground diameter, branching height, freeze injury. Seedling height has significant negative relationship with latitude and significant relationship with annual mean temperature, Jan. mean temperature and extreme lowest temperature; freeze injury value has extreme significant negative relationship with l...
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