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1980年以来,我所积极开展杨树杂交育种工作,并在湖北省杨树育种协作组统一安排下,与中国林科院林研所协作,开展了杨树品种改良攻关工作。经过连续七年的苗圃筛选和对比造林试验,有11个新品系的生长量不同程度的超过Ⅰ-69,Ⅰ-63和Ⅰ-72杨。在这些新品系中,经过综合性状比较鉴定,从中选择出生长量大、树干圆满通直、尖削度小、抗性强的三个杂交新品系为此次
Since 1980, I actively carry out poplar cross breeding work, and poplar breeding cooperative group in Hubei Province under the unified arrangement, in collaboration with the Institute of Forestry, Chinese Academy of Forestry, launched a poplar breed improvement work. After seven consecutive years of nursery selection and comparison of afforestation trials, 11 new lines exceeded the levels of I-69, I-63 and I-72 in varying degrees. In these new lines, through the comparison of comprehensive traits identified, from which to choose a large amount of growth, the trunk straight and perfect, taper small, strong resistance to three new hybrid lines for this