Comprehensive Selection for Eucalyptus grandis Provenances and Families

Abstract:

In order to select excellent provenances of Eucalyptus grandis, the traits of 177 families from 13 provenences were analyzed. The results showed that the individual volume had significant differences among blocks (P<0.05) at 22 months old, other traits were significantly different (P<0.01) among provenances, families and blocks at 22 and 50 months old. The top three provenances of individual volume were No. 2(came from Copperlode, QLD), No. 3 (came from Ravenshoe, QLD), No. 1 (came from N W Townsille, QLD) and No. 11 (came from Heilongtan, Sichuan) at 50 months old. Meanwhile, the volume increment of 78 families was bigger than the average of all families (0.08 m³), and the top three families were No. 2 (came from Copperlode, QLD, provenance No. 2), No. 156 (came from Tianma, Fujian, provenance No.10) and No. 93 (came from Bambaroo, QLD, provenance No.8). At 50 months old, the heritability of DBH, height, individual volume, stem form, branch and crown width were 0.56, 0.91, 0.73, 0.67, 0.64 and 0.76, respectively, while their phenotypic variation coefficients were 26.64%, 29.37%, 64.41%, 17.58%, 15.26% and 45.80%, and the genetic variation coefficients were 25.94%, 24.30%, 60.97%, 28.59%, 26.07% and 42.96%, respectively. The correlation analysis showed that the branch and crown width had negative correlation, others had positive correlation. Therefore, combing the growth traits and form quality traits, four superior provenances and eighteen superior families were selected.

Key words:Eucalyptus grandis;Provenance;Family;Growth traits;Quality traits;Heritability