中优85是由四川省种子公司,中国水稻研究所,四川省蒲江县种子公司利用中9A与蒲恢85杂交选育而成的优质、高产、稳产的籼稻新晶种。2003年,2004年月日,分别通过贵州省和云南省审定,2005年通过国家审定。适宜在安徽、江苏、福建、江西、湖南、湖北、浙江、云南、贵州、重庆的中低海拔稻区、四川平坝丘陵稻区、陕西南部稻区及河南南部做一季中稻种植。国审编号为2005012。 1 特征特性该品种属籼型三系杂交水稻。株型适中,后期转色好。 1．1 长江上游作一季中稻种植全生育期平均154．3 d,比对照汕优63迟熟0．2d。株高117．0cm,每亩有效穗数16.0万穗,穗长26．5 cm,每穗总粒数174．7粒,结实率81．0%,千粒重28．7g。抗性:稻瘟病平均6．7级,最高9级;白叶枯病1级;褐飞虱9 级。米质主要指标:整精米率61．4％,长宽比3．1,垩白粒率 26％,垩白度4．3%,胶稠度79mm,直链淀粉含量22．0%,达到 Zhongyou 85 is a new indica rice with high quality, high yield and stable yield, which was breed by the seed companies of Sichuan Province, China Rice Research Institute and Pujiang County of Sichuan Province. 2003 and 2004, respectively, through the approval of Guizhou Province and Yunnan Province, in 2005 through the national validation. It is suitable for middle season rice planting in Anhui, Jiangsu, Fujian, Jiangxi, Hunan, Hubei, Zhejiang, Yunnan, Guizhou, Chongqing, Pingba hilly rice area in Sichuan, southern Shaanxi rice area and southern Henan. State trial number 2005012. 1 Characteristics The indica three-line hybrid rice varieties. Moderate plant type, the late turn good color. 1.1 The mid-season rice planting in the upper reaches of the Yangtze River has an average of 154.3 days of whole growth period, 0.2 days later than the control Shanyou 63. Plant height 117.0cm, effective panicle per acre 160,000 spike, spike length 26.5 cm, 174.7 grains per panicle, seed setting rate of 81.0%, 1000 grain weight 28.7g. Resistance: Magnaporthe grisea average 6.7, the highest 9; bacterial blight 1; brown planthopper 9. The main indicators of rice quality: milled rice rate of 61.4%, aspect ratio of 3.1, chalky grain rate of 26%, chalkiness 4.3%, gel consistency of 79mm, amylose content of 22.0%, reaching