Study on the Variation and Correlation of Seedling Characteristics of Paulownia

16 seedling characteristics of genotype of 239 samples belonging to 9 speciesin Paulownia genus had been tested in nursery in Zhizong County,Sichuan Province from1983 to 1985.The correlation of each two characteristics and the data are analysed throtighthe method of stepwise regression, The results are as follows:1.there are significant correlations between 13 characteristics including height and diameter at ground level etc. Thatmeans the other characteristics will probably be improved more or less while some characteristics are improved.2.there are obvious differences in correlation coefficient and repeat heritability of species and characteristics so that the selection of characteristics at nursery stagewould be different in species and varied characteristics. 3.in the Paulownia genus the majorfactors influencing height and diameter of roots cuttings and regression eqtiation are indicatedin this paper.