籼型优质光温敏核不育系欣9366S的选育及应用OA

Xin 9366S is a high-quality indica photo-thermo-sensitive genic male sterile(PTGMS)line developed by Anhui Quanyin Xinlong Seed Industry Co.,Ltd.It was derived from the hybridization between 1892S(the female parent)and the self-bred line 9541S(Y58S/Guangzhan 63S),followed by 9 generations of directional selection across 5 years.It passed the technical identification organized by Anhui Provincial Crop Variety Appraisal Committee in August 2021.Xin 9366S features complete and stable male sterility,with a male sterile plant rate of 100%and a bagged selfing seed setting rate of 0.01%.Microscopic observation revealed that its pollen abortion was mainly of the typical abortion type,with a pollen abortion rate of 100%.It has a low critical sterility-inducing temperature of 23.5℃,and its stable sterile period lasted more than 30 days when planted in Hefei,Anhui Province.It has good flowering habits and strong high temperature tolerance during the seed production period,with an outcrossing seed setting rate of 70%or more.The hybrid combinations derived from Xin 9366S have excellent comprehensive traits,and three hybrid combinations,namely Xinliangyou Wan 1,Xinliangyou Wan 4,and Xinliangyou 6,were approved by the National Crop Variety Appraisal Committee from 2021 to 2022.This paper introduced the breeding process,fertility performance,characteristics,hybrid performance,and key technical points in multiplication of Xin 9366S.