秋优998 审定编号:国审稻2004001 选育单位:广东省农业科学院水稻研究所品种来源:秋A×广恢998 省级审定情况:2002年广东省农作物品种审定委员会审定特征特性:该品种属弱感光籼型三系杂交水稻,在华南作双晚种植全生育期平均119.3d,比对照博优998迟熟2．6d。株高106．6cm,株叶形好,群体整齐,分蘖较强,较易落粒, 抗倒力较弱,熟期转色好。每宙有效穗数20．2万穗,穗长22． 8cm,每穗总粒数137．1粒,结实率85．6％,千粒重20．9g。抗性:稻瘟病1级,自叶枯病5级,褐飞虱7级。米质主要指标: 整精米率60．0%,长宽比3．0,垩白率15％,垩白度2．7%,胶稠度74mm,直链淀粉含量22．2%。产量表现:2002年参加华南晚籼组区域试验,平均亩产 433．98kg,比对照博优998减产1．3％(不显著);2003年续试,平均亩产494．97kg,比对照博优998增产0．59％(不显 Qiuyou998 Validation number: State review paddy 2004001 Breeding unit: Rice Research Institute of Guangdong Academy of Agricultural Sciences Source of the species: Autumn A × Guanghui 998 Provincial-level validation: Guangdong Provincial Crop Variety Approval Committee in 2002 Features: Weak Indica three-line indica hybrid rice hybrid rice in southern China for the whole growth period of 119.3d, compared with the late Bo Yu 998 mature 2.6d. Plant height 106.6cm, plant leaf shape is good, the group neat, strong tiller, more easily falling, anti-over-power is weak, the turn of the color is good. There are 202,000 spikes and 22 spikes per panicle. 8 cm, total number of grains per panicle 137.1, seed setting rate 85.6%, grain weight 20.9g. Resistance: Magnaporthe grisea 1, leaf blight 5, brown planthopper 7. The main indicators of rice quality: 60.0% of milled rice, aspect ratio of 3.0, chalkiness rate of 15%, chalkiness 2.7%, gel consistency 74mm, amylose content of 22.2%. Yield performance: in late 2002 to participate in the South China late indica group regional experiment, the average yield 433.98kg, compared with the control Boehme 998 yield 1.3% (not significant); 2003 continued the test, the average yield 494.97kg, compared with the control Bo Excellent 998 yield 0.59% (not significant