Abstract:
Selection of 1year and 2year old male sterile clones of Catalpa fargesii f. duclouxii in Jianghan plain Hubei which introduced from Guizhou as materials to measure tree DBH and height. The results showed that the average diameter and height of 1year old clones were 2490cm and 2943m, and 2year old clones were 4289cm and 4220m, respectively. The results of ANOVA showed that the growth variation in different stand age was significant among clones. The repeatability of diameter and height for 2year old clones were 7121% and 6407%, respectively. DBH and height were taken as indexes, and weighted coefficient method was applied to estimate. Finally, 6 fine clones were chosen, the selection rate was 20%.