Abstract:In order to select excellent family of Liquidambar formosana, the genetic variations among 24 provenances and 310 families at 9 years old were analyzed, and excellent families and individuals were selected by multi-objective decision method. The results showed that there were significant differences in diameter at breast height (DBH), height, volume, height under branch, crown width and straight index among provenances and families (P<0.01), and the volume growth was better in provenances from Funing of Yunnan, Pingxiang of Guangxi and Hucheng of Jiangxi. The family heritability of all traits was moderate genetic control, ranged from 0.24 to 0.44, and the individual heritability was from 0.20 to 0.50. There were 26 excellent families and 41 excellent individuals were selected. The average DBH, tree height, volume, crown width and straight index of excellent families were larger than ensemble average for 19.63%, 18.56%, 52.16%, 5.11% and 4.03%, respectively, and their genetic gain was similar for 6.67%, 8.24%, 20.28%, 1.82% and 1.75%. The average volume of excellent individuals was larger than ensemble average for 150.25%. So, these would provide a theoretical basis for the breeding strategy making and application in production of L. formosana.
