中国水稻科学

中国水稻科学

• 研究报告 •    下一篇

水稻空间诱变雄性不育新种质的细胞学研究

陈忠正 1; 刘向东 1; 陈志强 1; 王 慧 1; 卢永根 1; 梅曼彤 2，*   

  1. 1 华南农业大学 农学院， 广东 广州 510642； 2 华南农业大学 生命科学院， 广东 广州 510642； * 通讯联系人
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2002-07-10 发布日期:2002-07-10

Cytological Observations on New Male Sterile Rice Mutant Induced by Space Flight

CHEN Zhong-zheng 1; LIU Xiang-dong 1; CHEN Zhi-qiang 1; WANG Hui 1; LU Yong-gen 1; MEI Man-tong 2; *   

  1. (1 Department of Agronomy; South China Agricultural University; Guangzhou 510642; China; 2College of Biotechnology; South China Agricultural University; Guangzhou 510642; China)
  • Received:1900-01-01 Revised:1900-01-01 Online:2002-07-10 Published:2002-07-10

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被引次数

121

摘要： 通过对空间诱变产生的雄性不育新种质WS-3-1 及其亲本特籼占13和一般品种IR36花粉形成发育过程的深入研究，发现WS-3-1 是一份无花粉型的雄性不育新种质，不育性稳定，不受光温条件影响。其败育机理是花药中层在小孢子母细胞早间期开始液泡化，过早降解，引起绒毡层过早退化，使绒毡层无法正常行使功能，导致小孢子母细胞粘连并在二分体时期解体，无法形成花粉。初步认为空间致变作用是明显的，会诱导一些特殊的变异。

关键词: 水稻, 不育系, 雄性不育性, 细胞学

Abstract: A new male sterile rice mutant WS-3-1 was induced by space flight, its male sterility was very stable and not affected by day length and temperature, and no pollen was observed in the mature anther. By using techniques of semi thin, ultra thin section and immunolabeling, results of cytological studied on the whole process of its pollen emerge and development showed that the mechanism of the male sterility in WS-3-1 was the middle layer cells near anther septum vacuolating at the early interkinesis stage of microsporocyte, and then the tapetum cells near the middle layer degenerated. The tapetum disintegrated so early that caused the microsporocyte to stick with each other and degenerate at dyad stage.

Key words: rice, male sterile line, male sterility, cytology