该品种是以“鸟取系”为原材料,通过群体选择和母系选择法培育出来的品种。育成经过是,于1974年秋栽培了约4,000株,1975年春,从中选出极早熟的直立型个体28株,以后不断通过自然杂交和选择,在1978年秋育成品系,命名为“千研 EE—1”。然后在育成地进行生产性能和特性的鉴定试验,1980年秋确认其特性已稳定,该品种正 The variety is based on the “bird system” as the raw material, through the group selection and maternal selection of cultivated varieties. After breeding, about 4,000 plants were cultivated in the autumn of 1974. In the spring of 1975, 28 extremely upright individuals were selected. After that, natural hybridization and selection were continued. In the fall of 1978, ". Then, in the breeder field, the performance test of the properties and properties was conducted. In the autumn of 1980, its characteristics were confirmed to be stable.