中国水稻科学

中国水稻科学

• 研究简报 • 上一篇    下一篇

光敏核不育水稻在寒冷稻作区的育性转换特性及开花习性

吴长明；曹静明；傅秀林   

  1. 吉林省农业科学院，公主岭136100
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:1993-04-10 发布日期:1993-04-10

Fertility Alteration and Flowering Habits of Photoperiod Sensitive Genic Male sterile Rice (PGMR) in the Cold Region

Wu Changming; Cao Jingming; Fu Xiulin   

  • Received:1900-01-01 Revised:1900-01-01 Online:1993-04-10 Published:1993-04-10

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被引次数

20

关键词: 杂交水稻, 育性转换, 开花, 寒冷稻区, 光温敏核不育水稻

Abstract: Fertility alteration characteristics and flowering habits of PGMR were studied under the local natural condition in Gongzhuling (43°21′N) and problem of using PGMR for hybrid rice breeding in the cold region were discussed. The critical photoperiod of fertility alteration of PGMR was 14.5-14.0 hours, but the local photoperiod could only meet the requirement of sterility of PGMR in the cold region over 38°N. Daily flowering time of PGMR was about 1 hours later and more dispersive than these of normal variety. It was low in the crossed pollination rate between PGMR and normal variety. Sterility of existing PGMR was unstable in the cold region. Fertility of PGMR was affected by temperature during differentiation stage of floret primodium.

Key words: Fertility alteration, Hybrid japonica rice, Photoperiod-sensitive genic male-sterile rice, The cold rice region