Preliminary Study on Grafting Effect of Fokienia hodginsii Clonal Seed Orchard

In 2018,at the Fengtian State owned Forest Farm in Anxi,Fujian Province,a survey was conducted on the tree height,crown width,and survival rate of 30 clones grafted for 240 days in the Fokienia hodginsii Seed Orchard. The main growth traits and variation patterns of different Fokienia hodginsii clones were understood,and suitable and excellent clones were selected for initial selection. The results showed that the average shoot height,crown width,and survival rate of 30 clones of Fokienia hodginsii were 21.82 cm,13.30 cm,and 77.84%,respectively,with significant differences among different clones; the coefficient of variation was the highest for crown width (72.10%),slightly higher for shoot height(58.75%),and the lowest for survival rate (33.80%); the correlation coefficient between shoot height and crown width reached 0.84,indicating a highly significant correlation. The correlation coefficients between survival rate and crown width and shoot height were 0.32 and 0.36,respectively,indicating a weak correlation; the repeatability of shoot height,crown width,and survival rate were 0.85,0.76 and 0.66,respectively,and there were significant differences among different clones. Six excellent clones were selected based on the trait of shoot height and a selection rate of 20%. The average values of shoot height,crown width,and survival rate were 26.45 cm,16.89 cm and 66.55%,respectively. The selected six clones obtained genetic gains of 18.03%,20.51% and -9.57%,respectively. These clones can be enriched as breeding materials for Fokienia hodginsii.