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特优6603是广西桂穗种业有限公司用不育系龙特浦A与自育的恢复系R6603配组而成的杂交水稻新组合。该组合具有高产、较抗稻瘟病等特点,2007~2008年参加桂南稻作区早稻迟熟组区试,2007年比对照特优63增产6.79%,区试平均比特优63增产5.91%,是近年桂审稻中稻瘟病抗性较好的品种之一。2010年5月通过广西农作物
Youyou 6603 is a new hybrid rice combination formed by Guangxi Guisui Seed Co., Ltd. with a combination of sterile line Longtepu A and its self-restoring line R6603. The combination of high yield and resistance to rice blast occurred in 2007-2008. In 2007-2008, it took part in the early rice late maturity group trial in the southern part of Gui Nan. In 2007, the yield was 6.79% higher than the control Tianyi 63 and 5.91% In recent years, Guizao rice blast resistance in one of the better varieties. May 2010 through the Guangxi crop