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- Title
Cytological Study on Zidao Type Cytoplasmic Male Sterile Line-Yingxiang A.
- Authors
Lei WEI
- Abstract
Anthers of male sterile line and its maintainer line of Zidao type rice, Yingxiang A and Yingxiang B were studied by cytological methods, such as I2-KI staining, silver nitrate staining and paraffin sections. It is found that in Yingxiang A, there are some abnormalities in meiosis, represented by unequal division at the meiotic phase; the abortion of CMS line arises at the meiotic phase and is almost completed at the phase of monomicrospore, but only a tiny amount of aborted microspores are observed; the abortion is complete and thorough, and none normal functional pollens are found; the morphology of aborted pollens is similar to that of typically aborted pollens; the tapetal cells still exist in anthers from the microsporocyte stage to the tetrad stage, but they are abnormally hyperplastic. However, in Yingxiang B, there are no abnormalities in meiosis at the meiotic phase; the tapetal cells exist in anthers before the tetrad stage, but they disappear completely when the pollen are mature. It is indicated that the abortion of CMS Yingxiang line mainly occurs at the meiotic phase, and is basically completed at the phase of monomicrospore. The abortion is probably caused by the abnormally hyperplastic tapetal cells. The abnormalities in tapetal cells may affect the normal development of pollens, resulting in the emergence of abortion. In addition, the abortion in Yingxiang A is complete and thorough, which is of great significance in hybrid breeding.
- Publication
Agricultural Science & Technology, 2015, Vol 16, Issue 3, p459
- ISSN
1009-4229
- Publication type
Academic Journal