黑杨派新无性系研究——Ⅰ、苗期测定

<正>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。

STUDY OF NEW CLONES OF THE AEGEIROS POPLAR I. Nursery Testing

19 clones were first selected from F1 progeny of I-69 poplar × Simon poplar intersectional hybrids and 11 clones from F1 progeny of I-69 poplar ×Nigra poplar interspecial hybrids. In the former, hh2 is 86.0211%; hd2, 85.1068%; hv2, 76.4196%; GCVh, 15.8371%; GCVd, 17.5931% andGCVv, 41.7448%, while inthe latter hh2 is 86.6561%; hd2, 96.6488%, hv2, 88.0213%; GCVh, 17.0832%;GCVa, 18.8078% and GCVv, 42.9045%. The results indicated that it is possible to select excellent poplar clones from these populations.Genotypic, phenotypic and environmental correlation coefficients were highly significant in height, diameter and volume. This indicated that any one of the three growth characters was decisive on the selection of excellent clones. Finally, 5 clones were further selected from the 19 selected clones and 6 clones from the 11 selected ones mentioned above, and their genotypic gain was estimated.