汕优3550是广东省农科院水稻所用珍汕97A与新育成的恢复系3550配组而成的晚籼中熟新组合。3550是1981年用青四矮16与IR54杂交,经多代选育而成。与珍汕97A配组定型后,经本所两年杂优新组合比较试验和杂优常规稻混合比较试验,表现突出,增产显著。1987年晚季参加省区试,表现耐肥抗 Shanyou 3550 is a new medium maturing combination of late indica rice cultivars Zhenshan 97A used by the Bureau of Agricultural Science of Guangdong Province and the newly developed restorer line 3550. 3550 is blue cross in 1981 with 16 IR16 hybrids, after multiple generations of breeding. With the Zhenshan 97A with a set of stereotypes, the two years by the hybrid new hybrid test and hybrid conventional hybrid rice comparison, outstanding performance, yield significant. In late 1987 to participate in the provincial test, the performance of resistance to fat