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宁A是用美B与特籼占13经航天搭载诱变获得的稳定突变株系H368杂交,再与美B回交1次后连续自交育成新的保持系,然后与美A测交并连续回交转育而成的水稻籼型不育系。具有群体农艺性状稳定、茎秆较粗壮、分蘖力强、败育彻底、育性稳定、米质优、稻瘟病抗性好、开花习性好、配合力强等特点,2013年10月通过广东省田间技术鉴定。所配组合宁优1179(宁A/R1179)于2014年通过广东省品种审定。
Ning A was crossed with the stable mutant line H368 obtained by aerobatic mutagenesis of US B and special indica 13, and then self-bred to a new maintainer line by backcrossing once with US B once, Continuous Backcross Transgenic Rice Indica CMS Lines. It has the characteristics of stable agronomic traits, stalks stalks, strong tillering ability, thorough abortion, stable fertility, good rice quality, good blast resistance, good flowering habits and strong combining ability. In October 2013, it passed Guangdong Province Field technical appraisal. The combination of Ningyou 1179 (Ning A / R1179) passed the Guangdong variety approval in 2014.