优质抗病水稻恢复系Q恢52的选育与应用

Breeding and Application of Restorer Line Q Hui 52 with Good Quality and Disease Resistance in Rice

Q恢52是重庆中一种业有限公司和重庆市农业科学院合作利用自育抗病恢复系Q恢25作母本,优质强优势恢复系R3547作父本杂交,通过系谱法并结合品质、稻瘟病抗性等目标性状早代定向跟踪选育而成的籼型三系恢复系。该恢复系具有株型松散适中、稻瘟病抗性强、品质优、配合力高等特点。以Q恢52为父本与神农4A和晶红1A配组育成的杂交组合神农优452和晶红优52于2020年分别通过了国家和重庆市品种审定。

Q Hui 52,derived from the cross of Q Hui 25/R3547,in which Q Hui 25 is a restorer line with strong blast resistance,and R3547 is an intermediate breeding material with strong restoring ability and good grain quality,is a new three-line indica restorer line developed through pedigree selection combining with the directional early-generation selection on the aiming characters including grain quality and blast resistance by Chongqing Zhongyi Seed Co.Ltd.and Chongqing Academy of Agricultural Sciences.It is characteristic of good plant type,strong blast resistance,good grain quality and high combining ability.The hybrid combinations derived by Q Hui 52 including Shennongyou 452and Jinghongyou 52 were registered and released by the National and Chongqing Crop Variety Appraisal Committee,respectively,in 2020.