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从I-69杨 ×小叶杨派间杂交 F_1中和从I-69杨×欧洲黑杨种间杂交 F_1中分别 初选出 19个和11个无性系。前者h~2_h= 86.0211％,h~2_d= 85. 1068％,h~2_v= 76.4196％; GCV_h= 15.8371％, GCV_d=17.5931％,GCV_v= 41.7448％。后者h~2_h= 86.6561％, h~2_d=96.6488％, h~2_v=88.0213％; GCV_h=17.0832％,GCV_d=18.8078％, GCV_v=42.9045％。说明从中选择优良无性系是可能的。 苗高、地径和材积三个性状之间的遗传、表型和环境相关系数都是极显著的,表明三个性状中任何一个性状均可作为优良无性系的选择性状。在前述初选的19个和11个无性系中又分别选择了5个和6个无性系,并估算了它们的遗传增益。
Nineteen and eleven clones were selected from I-69 × Populus × euphratica F_1 and F_1 from I-69 × European Poplar × Interspecies hybrids respectively. The former h ~ 2_h = 86.0211%, h ~ 2_d = 85. 1068%, h ~ 2_v = 76.4196%; GCV_h = 15.8371%, GCV_d = 17.5931%, GCV_v = 41.7448%. The latter h ~ 2_h = 86.6561%, h ~ 2_d = 96.6488%, h ~ 2_v = 88.0213%; GCV_h = 17.0832%, GCV_d = 18.8078%, GCV_v = 42.9045%. Explain that it is possible to choose good clones. The genetic, phenotypic and environmental correlation coefficients between the three traits of seedling height, diameter and volume were all significant, indicating that any one of the three traits could be used as the trait of elite clones. Five and six clones were selected from the 19 primaries and 11 clones, respectively, and their genetic gain was estimated.