优质高产杂交粳稻新组合常优4号的选育与应用

Breeding and Application of New Japonica Hybrid Rice Combination Changyou 4 with High Yield and Fine Quality

常优4号是用不育系武运粳7号A与恢复系CR-25配组育成的杂交粳稻新组合,具有株型紧凑、高产稳产、米质优(达国家优质稻谷1级标准)、适应性广、抗性较好等特点,2007年通过江苏省审定,2008年通过国家审定。

Changyou 4,developed from a new CMS Line Wuyunjing 7 A as the female parent and a new restorer line CR-25 as the male parent by Changshu Agricultural Research Institute,is a new three-line japonica hybrid rice combination. It has the charateristics of good plant type,high and stable yield,fine grain quality （reaching the national standards for the first class of fine quality rice）,wide adaptability and good disease resistances. It was examined and approved by Jiangsu Provincial Crop Variety Appraisal Committee in 2007,and by the National Crop Variety Appraisal Committee of China in 2008.