【摘要】 采用杂交育种与γ-射线辐射相结合，育成中籼稻皖稻57。该品种参加2a省区试，平均产量7087.9kg/ha，较对照密阳23平均增产12．5％，1a省生产试验，平均产量7141．2kg／ha，较对照桂朝2号增产5．9％。株型较紧凑，茎秆坚韧，分蘖力强，稳粒结构协调。米质优良，市场商品性好。抗至中抗白叶枯病，抗稻瘟病，中抗至高抗白背飞虱，抗至高抗褐稻虱。为优质、高产、多抗、早熟中籼品种。更多还原

【Abstract】 Wandao 57,a medium indica rice cultivar,was developed from the cross (IR4412-164-3- 6/IR4712-208 -1) F1 radiated by r -ray. Its average yield was 7. 09t/ha in the two-year’s (1988- 1989) province -levelregional trials, 12. 5% higher than that of check varirty Miyang 23,and 7. 14t/ha in the province level productivetest in 1990,5. 2% higher than that of Guicao 2 of check variety. It was characterized by gnd mophotype,robuststem,strong tillering ability, coodinating combination of spikelet and grain,and quality grain rice. The identifi-cation of diseases and pests by artificial inoculation showed that it possessed midddle resistance until resistance tobacterial lerf blight, resistance to rice blast,middle resistance until high resistance to white-back rice planthopperand resistance until high resistance to brown-back rice planthopper. Wandao 57 was the sort of early-maturingmedium indica rice cultivar.更多还原