欧洲黑杨分别与川杨和滇杨杂交及其F1代苗期性状

采用室内切枝水培法开展欧洲黑杨×川杨、欧洲黑杨×滇杨人工杂交实验.结果表明:欧洲黑杨×川杨、欧洲黑杨×滇杨授粉后第10天坐果率分别达92.88%和82.14%,种子发芽率达80%和50%,成苗率达72.5%和65.63%,杂交可配性强;这2个杂交组合当年生杂交苗平均苗高分别为44.3和42.2 cm,平均地径分别为5.50和5.37 mm,生长量非常接近,苗高变异系数分别为14.5%和19.01%,地径变异系数分别为10.7%和16.1%,变异幅度较大;F1代杂种实生苗在苗期主要性状特征表现为多态性.

A Hybridation Study between Populus nigra and P.szechuanica,P.yunnanensis and the Seedling Traits of the Hybrids

The artificial crossing between Populus nigra and P.szechuanica,P.yunnanensis was carried out indoors.The results show that the cross-ability between Populus nigra and P.szechuanica,P.yunnanensis was high and the fruit set percentage of the two crosses after pollination for 10 days reached 92.88% and 82.14% respectively;that the germination rate of hybrid seeds was 80% and 50% respectively;that the average height of hybrids from Populus nigra and P.szechuanica was taller than that of the hybrids from Populus nigra and P.yunnanensis;that the variation coefficient about the hybrids seedling height is up to 14.5% and 19.1% respectively;and that the variation coefficient about the collar diameter is 10.7% and 16.1% respectively.The traits of hybrids F1 took the characteristic of polymorphism.