“科情3号”粳稻与籼稻组配 F_1代结实率较高,这可能与其含有籼稻血缘有关。F_1代其它性状优势略低于典型籼粳交,但强于粳粳交和籼籼交。直接利用籼粳交优势应注意对籼粳交培育的品种开发。对籼粳交 F_1代的抗寒性、抗衰老性和直链淀粉含量等问题进行了初探。 The results showed that the F_1 generation of “Sec.3” japonica and indica rice had higher seed setting rate, which may be related to the fact that indica was related to its origin. F_1 was slightly lower than that of other indica-japonica hybrids, but stronger than japonica-japonica hybrids and indica-indica hybrids. Direct use of indica japonica crosses should pay attention to the indica japonica cross breeding varieties development. The cold resistance, anti-aging and amylose content of F1 generation in indica-japonica hybrids were studied.