籼型水稻三系雄性不育系恒达A的选育

Breeding Indica Rice CMS Line,Hengda A

摘要: 恒达A是以D62B为母本、IR58025B为父本的杂交后代F2选株与龙特甫B进行复交选育的保持系再与珍汕97A转育而成的籼型三系不育系。于2014年通过福建省农作物品种审定委员会审定 (闽审稻2014025) 。该不育系不育性彻底, 异交率高, 穗大粒多, 分蘖力强, 配合力好。本文介绍了不育系恒达A的选育过程、主要生物学特性及配制杂交水稻新品种的表现。

Abstract: Hengda A was a CMS Line rice bred by multiple-crossing the maintainer lines selected between Longtepu B and the filial generation F2 of the hybrid of D62 Band IR58025Bwith Zhenshan 97 Athrough successive backcrossing for years.It was registered and released for commercial applications in Fujian in 2014.Its outstanding characteristics included a complete sterility, high outcrossing rate, large panicle with numerous grains, strong tillering ability and desirable combining capacity.The breeding process, botanical characteristics and performance of the hybrid rice varieties of Hengda A are presented.