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本所从1975年开始,用甘兰型(7401)与白菜型油菜(南汇本油菜)杂交,选育出中早熟新品系7750。经二年夏繁加代,从1978年开始,以胜利青梗和勺叶青(7055)为对照进行产量鉴定。经本所三年鉴定,亩产339.1斤,比胜利青粳增产34.7％,比勺叶青增产21.8％。79～80年,本县品试鉴定,亩产328.7斤,比胜利青梗增产27.8％,比勺叶青增22.4％。81～82年,参加市区域试验,比勺叶青平均增产25.57％(见表)。
Since 1975, our institute has crossed with the cabbage type rape (Nanhui this rape) with the kulalan type (7401) and bred 7750, a new middle-early maturing line. After two years of summer Fan Jia generation, from 1978 onwards, the victory of Qing stem and spoon Yeqing (7055) for the control of yield identification. Three years by the Institute identified 339.1 kg per mu, yielding victory than the Qingjing 34.7%, 21.8% more yield than the spoon Ye Qing. 79 to 80 years, the county trial test, yield 328.7 kg, more than Victory Qingzhan 27.8% increase, than the spoon green by 22.4%. 81 to 82 years, to participate in the city regional test, an average increase of 25.57% than the spoon Ye Qing (see table).