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为选育低温钝感的早籼型光温敏核不育系 ,从抗罗早与 5 6 90杂交后代中获得一不育株 ,通过自然和人工低温的增压选择 ,育成了水稻低温敏两用核不育系陆 1 8S.该不育系育性转换临界温度低于 2 3.5℃ ,在湖南稳定不育期达 90 d左右 .开花习性好 ,异交结实率达 5 0 % ,可育期自交结实率在 30 %以上 .具有广亲和性 ,一般配合力强 .农艺性状好 ,米质优 ,耐寒性好 ,中抗稻瘟病 .用其选配的早晚稻组合经参加省 (市 )区试 ,应用前景看好
In order to breed low temperature insensitive early indica type photo-thermo-sensitive genic male sterile lines, an sterile line was obtained from progenies of crosses of resistant crosses and 5 6 90. Through the natural and artificial low-temperature pressurization selection, The dual-purpose nuclear sterile line Lu 1 8S.The fertility transition critical temperature of this CMS was less than 23.5 ℃, and the stable sterile period reached about 90 d in Hunan Province.The flowering habit was good and the outcrossing rate was 50% The self-fertility rate of seedling is more than 30% .It has the characteristics of broad compatibility, general combining ability, good agronomic traits, good quality of rice, good cold tolerance and resistance to rice blast. (City) district test, the application prospect is good