| The regional test of twenty-one treatments on hybrid larch was conducted at eight sites in Caohekou, Jilin, Shangzhi, Cuohai, Linkou,Fujin,Tieli and Beian,in this study takes 13 treatments of seeding at 7 sites and 21 treatments of juvenile at 8 sites as the experiment material, using the principle of genotype and environment interaction, using Eberhart & Russell, the George C. C. Tai,the additive main-effect and multiplicative interaction (AMMI), Shukla and Rank analysis method to analysis stability of growth traits and the growth,survival rate,genetic variation and photosynthetic traits, It can be a true reflection of genetic variation, growth performance in various locations, adaptability and stability, the relationship between physiological traits and growth traits, selection good families.The conclusion had a certain instruction:breeding good families of Hybrid Larch, the promotion at a large area.Themainfindingsareasfollows:1 There was larger variation in most traits of within treatments and treatment in seeding and juvenile age.the coefficients of variation of two-year old seeding height within treatments were 22.8%～32.3%, the average coefficient of variation was 27.85%.the greatest coefficients of variation was Larix. gmelinii12×L. gmelinii2, the smallest coefficients of variation was L. gmelinii5×L. gmelinii9.Juvenile age,the coefficients of variation of six-year old tree height within treatments were 31.9%～43.4%, the average coefficient of variation was 36.64%.the greatest coefficients of variation was L.kaempferi3×L. gmelinii9, the smallest coefficients of variation was L. gmelinii7×L.kaempferi77-2; the coefficients of variation of six-year old diameter at breast height (DBH) within treatments were 50.1%～71.2%, the average coefficient of variation was 56.16%.the greatest coefficients of variation was L.olgensis 73-4, the smallest coefficients of variation was L.kaempferi5×L. gmelinii12.the coefficients of variation of six-year old survival rate within treatments were 45.78%～68.63%,the average coefficient of variation was 54.83%, the greatest coefficients of variation was L.olgensis 73-4, the smallest coefficients of variation was L.kaempferi3×shi51. the coefficients of variation six-year old of net photosynthetic(Pn) within treatments were 3.1%～10.7%, the average coefficient of variation was 5.4%. genetic variation was less; the coefficients of variation of transpiration rate(Tr)within treatments were 29.6%～53.9%,the average coefficient of variation was 41.87%, the greatest coefficients of variation was L.kaempferi11×L. gmelinii2, the smallest coefficient of variation was L.kaempferi3×shi51.the coefficients of variation of stomatal conductance(Gs)within treatments were 30.8%～85.2%, the average coefficient of variation was 38.5%, the greatest coefficients of variation was L. gmelinii7×L.kaempferi77-2, the smallest coefficients of variation was L.kaempferi5×L. gmelinii12. 2There was a very significant positive correlation between two-year old seeding height and six-year old tree height(r=0.796), between six-year old Pn and tree height,DBH(r=0.588,r=0.688). Pn and Tr,Gs were positively correlated,high correlation with Gs,low correlation with Tr.3 The differents of treatments in two-year old seeding height were extremely significant at each locations. The differents of treatments in six-year old tree height were extremely significant at Caohekou,Cuohai,Fujin,Likou,Tieli. the excellent families which were suited for environment were selected according to tree height.L.kaempferi5xL.gmelinii9,L.kaempferi5×L.olgensis77-3 in Caohekou, heritability of tree height was 86.35%, genetic gain was 62.79%. L.gmelinii9×L.kaempferi76-2,L.gmelinii5xL.gmelinii9 in Beian, heritability of tree height was 39.02%, genetic gain was 42.21%. L.kaempferil2×L.gmelinii9,L.gmelinii6xhe6in Cuohai, heritability of tree height was 75.66%, genetic gain was 36.71%. L.kaempferi5xL.olgensis78-3,L.kaempferi5×L.gmeliniil2,L.kaempferi5×L.gmelinii9,L.gmelinii7xL.olgensis77-2 in Fujin, heritability of tree height was 81.07%, genetic gain was 37.66%. L.kaempferi5xL.olgensis 78-3,L.kaempferi3×shi51 in Jilin, heritability of tree height was 39.69%, genetic gain was 27.37%. L.kaempferi5xL.gmelini9, L.gmelinii7xL.olgensis77-2 in Linkou, heritability of tree height was 88.94%, genetic gain was 62.26%. L.kaempferi5xL.olgensis78-3L.kaempferi3xL.gmelinii9,L.gmelinii9xL.kaempferi76-2 in Shangzhi, heritability of tree height was 11.66%, genetic gain was 19.92%. L.kaempferi5xL.gmelinii9 in Tieli, heritability of tree height was 54.41%, genetic gain was 31.63%.4The average survival rate of the families was 40.19%, the better preservatly families were L.kaempferi3×shi51,L.kaempferi5xL.olgensis77-3,L.gmelinii7xL.olgensis77-2,L.kaempferi5xL. gmelinii9,L. gmelinii 5xL. gmelinii9, The average survival rate was43.82%, the families which survival rate was good exceeded Bai daoshan provenance,Xiao beihu provenance,Wu yiling provenance in 10.1%,17.29%,27.76%.5The analysis of seeding stability showed that L. gmelinii9×L.kaempferi76-2,L. gmelinii 5×L. gmelinii9,L.kaempferill×L. gmelinii2, L.kaempferi5×L.olgensis78-3 were the families of good growth and high stability, The average seedling height of four treatments exceeded Bai daoshan provenance,Xiao beihu provenance in 31.24%,27.36%, L.kaempferi5×L.olgensis77-3,L. gmelinii 12×L. gmelinii2,L.kaempferi5×L. gmelinii9,L.kaempferi3×L. gmelinii9 grew well in some areas. AMMI model and the George model were suitable for evaluating stability. The analysis of juvenile stability showed thatL.kaempferi5×L gmelinii9,L.kaempferi5×L.olgensis78-3,L. gmepo0-linii10×L.kaempferil3 were the families of good growth and high stability, The average height of four treatments exceeded Bai daoshan provenance,Xiao beihu provenance,Wu yiling provenance in 32.75%,25.93%,23.29%. L. gmelinii 7×L. L.olgensis77-2,L.kaempferi5×L.olgensis77-3 grew well in some areas. Ranking analysis and Shukla model model were suitable for evaluating stability.
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