Abstract: According to the 6-year-old data of Alnus cremastogyne,the experiment analysis has been made for the 13 provenances in 5 sites. It proved that there was a highly significant difference among provenances in height (H) and single tree volume(V)(F=7.93^{* *} andF=4.83^{* *} ), and the interaction between provenance and environment was also highly significant(F=2.70^{* *} and F=2.21^{* *} ). Their genetic stability and growth adaptability have been evaluated using Eberhart etc's trait regression parameters (b_i and s²_di), Wrick's ecovalue parameter (W_i) and Additive Main Effects and Multiplicative Interaction analysis (AMMI).The estimates of AMMI were greatly concordant with the estimates of ecovalue. Age age correlation analysis results showed that there were significant correlation in heights at 6 years and 14 years(r=0.7580), which showed the reliability of early selection. The provenance heritablities and standard errors of main growth traits in H, diameter of breast height (DBH) and V were respectively 0.8738±0.0482、0.7961±0.0718 and 0.7929±0.0727. If the best provenance or 2～3 superior provenances were selected in each site respectively, the expected gain for volume is 39.03%, the average genetic gain for the volume is 27.57% respectively. According to the main effective values and stability parameters, the suitable regions for the provenances were estimated.

Key words: Alnus cremastogyne, Provenance× environment interaction, Genetic stability, Growth adaptability, Genetic parameters, Comprehensive assessment