水稻广亲和温敏不育系株1S的选育及应用

Breeding and Utilization of TGMS Line Zhu 1 S in Rice

株 1 S是用遗传距离较远的不同生态类型材料杂交育成的籼型广亲和温敏不育系。育性转换临界温度2 3℃左右 ,在湖南稳定不育期 90 d以上。开花习性好 ,异交结实率 4 0 %以上。海南冬繁和本地低温水深灌繁殖自交结实率在 3 0 %以上。具有广亲和性 ,一般配合力和特殊配合力均较强。用其选配的早晚稻组合已有 4个参加省区试 ,具有广阔的应用前景。

Zhu 1S, derived from a sterile plant in the F 2 generation of the cross of Kangluozao∥4342/02428 and developed by way of directional selection, is an early indica TGMS line with wide compatibility. Its critical sterility inducing temperature (CSIT) was low at about 23℃. Grown in Hunan Province, it had a long stable sterile period over 90 days. Zhu 1S had a good flowering habit and its outcrossing rate was over 40% in hybrid seed production. It can be multiplied in Hainan in winter or through cold water irrigation in Hunan with its selfed seed set more than 30%. The line had good combining ability with its hybrids showing strong heterosis in various yield trials.