Abstract:

Years of series observation to the White Poplar Hybrid 741(Poplar 741) transformed two insect-resistant genes (BtCry1Ac and API genes rebuilded partly) in the character of the insect-resistance, growth, lumber quality, seeding character and the adaptability indicated that 3 of the Poplar 741 clones took on a high insect-resistant identity to the leaf pests such as the Clostera anachoreta Fabricius, and the Lymantria dispar Linnacus ect., and the mean death rate of the grubs were all above 80%, furthermore, the grubs' growth which survived could be restrained and the growth rate was reduced so that they couldn't tie cocoons as the usual. The quality of insect_resistantce of the Poplar 741 varieties had not taken on a rhythmical drop trend by 4 years tests. The giving body of the Poplar 741 varieties possesses the advantages of fast growing, and especially in the anaphase of the growth of the DBH, and the timber volume take on an evidently fast growth, the growth quantity of the timber volume per tree go beyond 40% compared with the control averagely. The Poplar 741 varieties have the fine lignum character and the mechanics character such as the lignum density and the fiber quality are all superior to the Chinese White Poplar. 3 years' series observation indicated that the two insect-resistant genes transformed Poplar 741 was the high yield trigamous plant and had the small, little spikes of which about 70%～90% fell off before they crazed when they were ripe and the Poplar 741 didn't fly garrulous basically. The Poplar 741 transformed genes could be extended in the proper area of the Chinese White Poplar under the condition that the Poplar 741 varieties haven't evident differentiation and the growth didn't get infection much. Taking feasible planting mode in order to control the development of the fastness of the pests should be considered.

Key words: poplar 741, two insect-resistant genes, insect-resistantce, growth and lignum characteristic, adaptability