摘要： 通过2种细胞质紫菜薹雄性不育系小孢子发生的细胞形态学观察表明，供试不育系的雄蕊都深度退化，花药内无花粉。改良不育系小孢子在四分体前发育正常，在单核小孢子期，绒毡层异常膨大挤压小孢子，造成小孢子发育营养不良，引起小孢子败育。Ogura不育系的小孢子发育有所不同，它在孢原细胞分化期之前就已有53%败育，不形成花粉囊；形成花粉囊的孢原细胞大多只形成2个体积很小的的花粉囊，其中的小孢子发育与改良不育系的小孢子发育相似：单核早期绒毡层膨大挤压小孢子，使小孢子败育。

关键词: 细胞质雄性不育系, 花药发育

Abstract: A comparative developmental study of anther in two male sterile lines of purple caitai indicated that the anther of male sterile lines that do not contain pollen grains degenerated absolutely. Improved radish CMS lines were similar to male fertile line in anther development up to the tetrad stage; after this stage, the tapetal cells became larger and pressed microspore tightly thereby causing degeneration; but among ogura CMS line, 53% of the anther development was inhibited before the stage of archesporial cell and had no differentiation of microsporangium, 47%of the anther had differentiation of microsporangium which occupied small volume of the anther. The fate of microspore which aborted at uninucleate pollen stage is similar to improved radish CMS lines.

Key words: Cytoplasmic male sterile, Anther development

中图分类号: 

• S631.1