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杨属中最早(1912年)成功利用杂种优势的是英国人那利(Henry)教授。他用卡洛林杨与毛果杨杂交培育出了格氏杨(Populus genry);沙柯梅季博士(1925年)在美国南部获得了加拿大杨与黑杨杂交的一个变种(P·Vat stelld)的杂种,经五个月的培育高达3.5米;苏联选种家雅布海柯夫用山杨和新疆杨杂交育出雅布海柯夫杨(1938年,P·Jablokowa Jabl),七年高达8.4米胸径7.8厘米;意大利经过几十年选育的欧美杨Ⅰ—214,12年生胸径72厘米,广为引种栽植;苏联、匈牙利、波兰三国林学家长期合作,以胡杨与其它多种杨树杂交育出的和平树,一年生高4.5米,耐沙漠气候。我国叶培忠教授1946年开始研究杨树良种选育工作,1958年以来与南京植物所合作育出“南林杨”、“赛山杨”、“小意杨”等优
The first of Populus (1912) to succeed in the use of heterosis was the British Professor Henry. He popularized Populus genry with a cross between Populus carolinensis and Populus trichocarpa; Dr. Shakmeetz (1925) obtained a variant of the Canadian poplar and Populus hybridisation in the southern United States (P. Vat stelld ), Up to 3.5 meters after five months of cultivation; Yabu Haike Fu Yang (1938, P. Jablokowa Jabl) was bred from the Soviet electoralist Yabu Haikof with hybrids of Populus euphratica and Xinjiang poplar, seven years Up to 8.4 meters diameter of 7.8 cm; Italy after decades of breeding Europe and the United States Yang Ⅰ-214, 12-year-old diameter of 72 cm, widely introduced and planted; the Soviet Union, Hungary, Poland three forest experts long-term cooperation with Populus and many other Yang Peace tree bred by hybrid tree, annual height of 4.5 meters, resistant to desert climate. In 1946, Professor Ye Peizhong started to study the breeding of poplar seedlings. Since 1958, he cooperated with Nanjing Botanical Garden to breed “Nan Lin Yang”, “Sai Shan Yang” and “Xiao Yi Yang”