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园艺学报 ›› 2001, Vol. 28 ›› Issue (5): 409-414.

• 研究论文 • 上一篇    下一篇

大白菜雄性不育系小孢子发生的细胞形态学研究

郭晶心;孙日飞*;宋家祥;张淑江
  

  1. (中国农业科学院蔬菜花卉研究所, 北京100081)
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2001-10-25 发布日期:2001-10-25

Microsporogenesis of Several Male2Sterile Lines in Brassica rapa L. ssp. pekinensis

Guo Jingxin , Sun Rifei , Song Jiaxiang , and Zhang Shujiang   

  1. (Institute of Vegetables and Flowers , Chinese Academy of Agricultural Sciences , Beijing 100081)
  • Received:1900-01-01 Revised:1900-01-01 Online:2001-10-25 Published:2001-10-25

摘要: 采用塑料半薄切片技术, 在光学显微镜下系统地观察了大白菜同质异核、异质同核细胞质雄性不育系、细胞核雄性不育系及其相应保持系花药发育过程的细胞形态学特征。研究结果表明: 细胞核雄性不育系花药败育主要发生在减数分裂期, 花粉母细胞不能发生正常的减数分裂; 细胞质雄性不育系花药败育主要发生在四分体时期或小孢子单核期, 表现为绒毡层细胞异常, 四分体或小孢子败育。

关键词: 大白菜, 雄性不育, 小孢子发生

Abstract: Microsporogenesis of two cytoplasmic male sterile (CMS) lines 66A and 61A , one genic male sterile ( GMS) line 76A and their maintainers was investigated cytologically by using plastic semi2thin sections with light microscopy. The complete abortion of 76A occurred at the stage of meiosis , the pollen mother cells could not develop to form tetrads due to the abnormal meiosis meanwhile the tapetum cells degenerated prematurely. CMS 61A line formed abnormal tetrad. The callose wall did not degenerate and no microspores were released from the tetrad. At the same time , an abnormal morphology of the tapetum cells was observed , which showed either hypertrophy or a
formation of periplasmdium. The inhibition of mosporogenesis of CMS 66A occurred at the uninucleate stage when the microspore failed to continue gametogenesis and abnormal vacuolation and rudimental exine were observed. The tapetum cells were abnormal with hypertrophy or forming periplasmdium.

Key words: Brassica rapa L. ssp. pekinensis, Male-sterile, Microsporogenesis

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