摘要
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 。
Lu 18S is an early indica photo thermal sensitioe genic male sterile(PTGMS) line. As a sterile strain discovered in the F 2 generation of the cross of “Kang Lozao///Ke Fuhong2/Xiang Zaoxian3//02428”,it was selected at the condition of the pressure of the artificial lower temperature and the natural lower temperature in 1996.The critical sterile temperature is lower than 23.5 ℃ and its steady infertility period is about 90 days in Hunan.This strain has good bloom and a crossed seed set of 50%.Selfed seed set is higher than 30%.It shows a wide compatability and good general and special combining ability.It has high quality grain,strong resistance to coldness and medium resistance to rice blast.
出处
《湖南农业大学学报（自然科学版）》
CAS
CSCD
2000年第3期155-159,共5页
Journal of Hunan Agricultural University(Natural Sciences)
基金
湖南省中青年科技基金资助项目 !(970 9)
关键词
水稻
低温敏核不育系
广亲和性
选育
陆18S
hybrid rice
indica thermal sensitive genic male sterility
critical sterile temperature
wide compatability
breeding
