优质高产杂交晚粳组合“8优161”及其三系选育

BREEDING OF NEW JAPONICA HYBRID RICE “8 YOU 161”WITH GOOD QUALITY AND HIGH YIELD AND ITS THREE LINES

8优161即“8204A／R161”是一个高产、优质兼备的杂交晚粳优良新组合。1991～1993年参加上海市杂交晚粳区试和生产试验，三年均比对照寒优1027增产，平均增产8.56％，1993年生产试验比寒优湘晴平均增产11．1％，南方稻区杂交粳稻联合鉴定，比对照秀水04增产12．88％。大面积试种产量在9000kg／hm2以上，1996年最高产量达到11497．35kg／hm2。米质优良，主要指标达到部颁优质米标准。突出优点为出米率高，稳大粒多结实率高，灌浆速度快。不育系8204A不育性稳定，产量的特殊配合力强。恢复系R161恢复力强，米质特别优良。

8 You 161' or 8204A/R161, is an new late japonica hybrid rice with high yield and good quality. The yield of the new hybrid increased by an average of 8. 56% over the check variety 'Hanyou 1027' in Shanghai hybrld rice district experiments in 1991~ 1993.Also, its yield increased by 11. 1 % and 12. 88%, respectively, compared with'Hanyouxiangqing' in 1993 Production Test and 'Xiushui 04' in South China Hybrld Combined Test.Its output was over 9 000 kg/hm2 when grown on a large scale, and reached maximally 11 497.35 kg/hm2 in 1996. The marked advantageous features of the new hybrid are high milling setting and milking rates. The main rice quality indices of the new hybrid are up to the high-quality rice standards issued by the Agriculture Ministry. in addition, the sterile line '8204A' shows stable sterility and strong variance of specific combining ability and the restorer line 'R161' is possessed of strong restoring ability and specially good rice quality.