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1972年我国出席七届世界林业会议代表团从意大利带回两个美洲黑杨(69,63),两个欧美杨新无性系(72,45),由原中国农林科学院引种组分别在本院和南京林产工业学院繁殖,其中南京林产工业学院在江苏泗阳县试种初步成功。为了确定这四个新无性系在我国推广范围,1978年我们采用江苏省泗阳县林苗圃繁殖的种条,在40个试验点进行统一测试。1980年秋林业部造林司在湖北、河南、安徽等省的50个县扩大区域造林试验。一、试验材料来源及遗传性状分析 1.鲁克斯杨(Populus deltoides Bartr.CL.‘LUX’I-69/55)是意大利杨树研究所1952年由美国伊里诺斯州的马萨克引入的美洲黑杨种子中选育出来的。 2.圣·马丁诺杨[P.×euramericana(Dode)Guinier.CL.‘SAN MARTINO’I-72/58]是意大利杨树研究所从成年杂种欧美杨自然授粉种子中选出。 3.哈佛杨(P. deltoides Bartr. CL.‘HA-
In 1972, the delegation of China attending the 7th World Forestry Congress brought back two American black poplars (69,63) and two European poplar clones (72,45) from Italy. The former Chinese Academy of Agriculture and Forestry introductory group And Nanjing College of Forestry and reproduction, of which Nanjing Institute of Forestry in Siyang County, Jiangsu trial initial success. In order to determine the four new clones in China to promote the scope of 1978, we use the breeding of seedlings in Siyang County, Jiangsu Province, nurseries, in 40 test points for uniform testing. In the autumn of 1980, the Afforestation Division of the Autumn Forestry Department expanded the afforestation experiment in 50 counties in Hubei, Henan and Anhui provinces. I. Experimental Material Origin and Genetic Analysis 1. Populus deltoides Bartr.CL.’LUX’I-69/55 was introduced by the Italian Poplar Institute in Massachusetts, Illinois in 1952 American poplar seed breeding out. 2. P. euramericana (Dode) Guinier.CL.’SAN MARTINO’I-72/58] is the poplar institute of Italy selected from the adult hybrid European and American natural pollination seeds selected. 3. P. deltoides Bartr. CL.’HA-