“钻天榆×新疆白榆优树杂交新品种”系由新疆吉木萨尔县林木良种试验站在研究白榆各无性系开花习性和交配可育率的基础上,选择温湿速生型河南白榆优良类型钻天榆与抗寒耐旱生态型的新疆白榆优树为亲本,于1978?1986年建立“钻天榆×新疆白榆优树杂交种子园”28 hm2。种子园子代 “Dried tall elm × Xinjiang elm hybrid tree new varieties” by the Xinjiang Jimusar County Forest Variety Experimental Station in Elshlum elm clonal flowering and mating on the basis of fertility, the choice of warm and white fast-growing Henan white Ulmus excelsiorum, and drought-tolerant and drought-tolerant Xinjiang Ulmus excelsum were used as their parents, and established “Dried Ceratospea × Xinjiang elm hybrid tree seed orchard” for 28 hm2 from 1978 to 1986. Seed garden son generation