Genetic Variation and Early Selection of the Provenances/Families of Eucalyptus cloeziana
Abstract
Eucalyptus cloeziana is a potential saw timber species,the study on provenances and families shows that mean HT and mean DBH arrives to 7.45 m and 7.10 cm at 2.5 years old,and there are significant differences between provenances and families for all growth traits.The heritability of HT,DBH and Volume of family are 71.1 %,75.1 % and 68.5%,and also the heritability of HT、DBH and Volume appearing to be the older the bigger.There are also much higher genetic gains for DBH and Volume of the families that arrive to 12.68% and 25.26%,and for HT just is 6.68%.Therefore,DBH and Volume of families will be the main factors in the early selection.8 seedlots and 20 families are selected as recommended potential improved materials by the way of index selection,