“北优一号”是由湖南省农业科学院园艺所于1975年以“北京茹叶”为母本,“少先队员一号”为父本选配的杂交新组合。具有植株紧凑、早熟、丰产、抗病等特点。据1976年组合力测定,小区折合亩产7457.4斤,比父母本分别增产24.4％和76.6％。在13个供试组合中,早熟性居第一。1978～1980年在 “North Youyi No.1” is a new hybrid combination made by Horticulture Institute of Hunan Academy of Agricultural Sciences in 1975 with “Beijing Ruye” as the female parent and “Young Pioneer No.1” as the male parent. With plant compact, precocious, high yield, disease resistance and so on. According to the determination of combined force in 1976, the plot converted 7457.4 kg of mu per mu, an increase of 24.4% and 76.6% respectively over that of the parents. Among the 13 tested combinations, precociousness ranked the first. From 1978 to 1980