“6185”是我所1972年以72—5(I R661)与晚稻品种“5450”杂交,选育而成,自第三代开始选单株与珍汕97不育系进行测交,经过三个世代连续选择回测结果,于第六代稳定。经近两、三年的杂交水稻优势对比试验,本省及南 “6185” is a hybrid between 72-5 (I R661) and 5450 from late rice in 1972. It was selected from the third generation and Zhenshan 97 male sterile line for cross test. After three Successive generations of backtesting results were selected and were stable in the sixth generation. Nearly two or three years of hybrid rice superiority comparative test, the province and South