1964年在泸县玉蝉试验站,引进16个油桐品种,1969年进行品种间有性杂交,1970年定植杂种苗,1973年试花结果。经连续5年观察记载、评比、鉴定,从1969年第一批杂交的111个组合607株杂种 F_1中初步选出了两个杂种优势株如下。一、玉蝉47——(南百_1×广对_(10))47号F_1)母本;南百_1(广西南丹百年桐1号树) In 1964 in Lu County Cicadas experimental station, the introduction of 16 varieties of tung tree, in 1969 to carry out sexual hybridization between varieties, planting seedlings in 1970, 1973 test flowers results. After five consecutive years of observation, appraisal and identification, two heterotic strains were initially selected from 111 combinations of 607 hybrid F_1 in the first batch in 1969. First, the cicada 47 - (South 100 _1 × wide pair (10)) 47 F_1) female; South 100 _1 (Guangxi Nandan Centennial Tree 1)