Genetic Analysis on Main Growth Traits of Cunninghamia lanceolata Cross Combinations

Cross experiment was conducted in third generation clonal Cunninghamia lanceolata seed orchard in Longquan, Zhejiang province in February and March of 2013. 20 cross combinations were obtained for seedling cultivation and afforestation test in Kaihua, Zhejiang in March, 2014 and 2015. Tree height and DBH was determined in November, 2017. The results showed that it had extremely significant difference (α=0.01) of tree height and DBH among cross combinations and female parents, and as well as it had also the same difference of tree height among interactions of female × male. Tree height and DBH of cross combination had higher general combining ability. 4 fast-growing crossing combinations were selected by comparison on tree height and DBH, with mean tree height and DBH of 3.44 m and 4.43 cm.