徒稻4号A×反五-2是水稻杂种优势利用课题组于1979年选育的杂交晚粳新组合。1980-1982年在南方稻区(苏、皖、沪、湘、鄂五省市六个点) 单季杂交粳稻区试中,连续三年亩产量居供试组合的第一位,其中1980年亩产972.5斤比对照“鄂宜105”增产12.9%;1981年亩产854.7斤比对照“南粳34”增产22.9%;1982年亩产1037.8斤, Ataoyao No.4 A × A-Wu-5 is a new combination of late japonica hybrid rice selected in 1979 by the research group of rice heterosis utilization. In 1980-1982, in the single-season japonica hybrid rice trial in the southern rice area (six points in Jiangsu, Anhui, Shanghai, Hunan and Hubei provinces), the yield per mu for three consecutive years ranked the first among the combinations tested, of which 1980 A yield of 972.5 kg more than the control “E-105” increased by 12.9%; in 1981 854.7 kg per mu than the control “South Japonica 34” increased by 22.9%; 1982 mu 1037.8 kg,