杨树品(系)的群体中发生雌雄同株个体,在国内已发现有毛白杨、银白杨、小叶杨、胡杨。国外在欧洲山杨、美洲黑杨、灰杨的群体中曾发现。 近年来我们在物候观察,采集种条、采种育种的过程中,发现了欧洲黑杨雌雄同株其后又在青杨派与黑杨派的杂交杨品(系)的群体中发现三株雌雄同体。为了观察其特性,我场进行播种育苗、嫁接育苗。 Poplar products (lines) occur in the hermaphrodite individuals in the country have been found in Populus tomentosa, Poplar, Populus, populus euphratica. Foreign Populus euphratica in Europe, Populus nigra, aspen populations have been found. In recent years, we observed the phenological observation, collection of species, seed breeding process, we found that the herring of European black and white heron and then in the Qingyang and Black Poplar hybrid Yang products (lines) found three hermaphrodites . In order to observe its characteristics, my field sow seedlings, grafting nursery.