玉米杂交种5308是河北省农科院玉米群体改良协作组以53系为母本,8112为父本杂交而成的单交种。1990—1992年在省中熟组区域试验中,平均亩产533.0—554.0公斤,比掖单二号增产4.13％—15.8％,每年均居前2位;1993年省大区试验平均亩产532.4公斤,比掖单二号增产15.72％,居首位。云南、四川、贵州等省试验,该杂交种均比当地常用对照种显著增产;1993年云南大理州祥云县1600亩示范田,亩均800公斤。该县芮家营村6亩高额丰产田,平均亩产1050公斤,通过了专家组验收。 一、特征特性 5308杂交种在石家庄夏播生育期95—100天, Maize hybrid 5308 is Hebei Province Academy of Agricultural Maize Improvement Collaborative Group to 53 lines as the female parent, 8112 as the male parent single cross. From 1990 to 1992, in the regional trial of Zhongshu Group in the province, the average mu yield was 533.0-554.0 kg, an increase of 4.13% -15.8% over that of Yedang No.2, ranking the top two in each year. In 1993, the average yield per mu in the whole region of the province was 532.4 mu Kg, an increase of 15.72% than the second single yak, ranking first. Yunnan, Sichuan and Guizhou provinces. The hybrids all increased significantly more than the control varieties commonly used in the area. In 1993, 1,600 mu of demonstration fields in Xiangyun County, Dali Prefecture, Yunnan Province, each had 800 kg of mu. The county Ruijiayingmu 6 acres of high yield farmland, the average yield of 1050 kilograms, passed the expert group acceptance. First, the characteristics of 5308 hybrids in Shijiazhuang summer sowing period of 95-100 days,