水稻光温敏核不育系智农S的选育

Breeding of PTGMS Line Zhinong S in Rice

水稻光温敏核不育系智农S是以C815S为母本与保持系629B杂交,以F1代为父本与C815S回交,经过5 a 10代定向选择培育而成。该不育系不育起点温度低、株型好、米质优、异交率高、配合力强,于2018年通过福建省农作物品种审定委员会审定。以智农S配组的智两优5336等7个组合已通过国家或省级品种审定。

Zhinong S,derived from the cross of C815S//C815S/629B,is a photoperiod-and thermo-sensitive genic male sterile(PTGMS)line in rice developed through five years and ten generations of directional selection on target traits.It has low critical sterility-inducing temperature,good plant type,fine grain quality,high outcrossing rate and strong combining ability.It was technically identified by Fujian Crop Variety Appraisal Committee in 2018.Seven hybrid rice combinations including Zhiliangyou 5336 derived from Zhinong S,have been registered and released for commercial production at the national or provincial level.