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970 1S是我所新近育成的水稻中籼型光敏核不育系。经 1998年人工气候箱鉴定 ,不育起点温度2 3 5℃ ,可育上限温度 2 8℃ ,在 14 5h 2 3 5℃、 12 5h 2 8℃条件下 ,其不育性和可繁性与对照农垦 5 8S相当。短日结实性好 ,在宜昌地区秋播能正常繁殖种子 ,自交结实率达 45 %左右 ,与对照N5 0 88S产量相当 ,公顷产量可达 32 5 0kg以上。经 1997～ 1999年大群体自然条件下育性鉴定 ,不育株率 10 0 % ,花粉不育度10 0 % ,套袋自交不实率 99 5 4%以上。该不育系中抗白叶枯病和稻瘟病 ,品质达部颁二级优质米标准 ,配合力好 ,所配组合 970 1S/ 72 5、 970 1S/ 419产量比对照汕优 6 3增产 10 44 %～ 15 8%。
970 1S is a newly developed rice mid-indica type photo-sensitive genic male sterile line. After the artificial climatic chamber was appraised in 1998, the starting point of infertility was 235 ℃ and the maximum fertile temperature was 28 ℃. The sterility and reproducibility of the sterility at 125 ℃ and 125h under 14 5h 2 3 5 ℃ Control Nongken 5 8S quite. Good short stature, in the Yichang area in the normal breeding of seeds can be seeding, self-seeding rate of about 45%, with the control N5 0 88S yield equivalent, hectare output up to 3250kg above. The identification of fertility in large population from 1997 to 1999 showed that the rate of infertility plants was 100%, pollen sterility was 100% and bagging self-incompatibility was 99.54%. The resistance to bacterial leaf blight and rice blast in the CMS was up to the second grade of high quality rice standard with good combining ability. The yield of 970 1S / 72 5, 970 1S / 419 was higher than that of the control Shanyou 6 3 44% ~ 15 8%.