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Cytological Observation on Anther Development of Five CMS Lines in Brassica napus

Guo Yingfen

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Abstract

In order to determine the pollen abortion stage and cytological characters of cytoplasmic male sterile(CMS) lines,five CMS lines including normal green ogu,pol,nap,758A and Shan3A and their maintainers were used to observe the anther development by means of paraffin section method in Brassica napus.The results indicated that the anther abortion period of CMS-ogu started from tetrad to mononuclear stage.It was hard to release microspores from tetrad,and degeneration of tapetum was delayed.The anther development of Shan 3A type,nap and pol CMS was inhibited at the sporogenous cell,besides,a few pollen sacs could develop and produce normal pollen grains.The anther abortion of CMS 758A started also at the sporogenous cell stage,however,it could not produce sporogenous cells,the pollen sacs and pollen grains,and completely aborted.

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What this paper is about

In order to determine the pollen abortion stage and cytological characters of cytoplasmic male sterile(CMS) lines,five CMS lines including normal green ogu,pol,nap,758A and Shan3A and their maintainers were used to observe the anther development by means of paraffin section method in Brassica napus.The results indicated that the anther abortion period of CMS-ogu started from tetrad to mononuclear stage.It was hard to release microspores from tetrad,and degeneration of tapetum was delayed.The anther development of Shan 3A type,nap and pol CMS was inhibited at the sporogenous cell,besides,a few pollen sacs could develop and produce normal pollen grains.The anther abortion of CMS 758A started also at the sporogenous cell stage,however,it could not produce sporogenous cells,the pollen sacs and pollen grains,and completely aborted.

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Available abstract

In order to determine the pollen abortion stage and cytological characters of cytoplasmic male sterile(CMS) lines,five CMS lines including normal green ogu,pol,nap,758A and Shan3A and their maintainers were used to observe the anther development by means of paraffin section method in Brassica napus.The results indicated that the anther abortion period of CMS-ogu started from tetrad to mononuclear stage.It was hard to release microspores from tetrad,and degeneration of tapetum was delayed.The anther development of Shan 3A type,nap and pol CMS was inhibited at the sporogenous cell,besides,a few pollen sacs could develop and produce normal pollen grains.The anther abortion of CMS 758A started also at the sporogenous cell stage,however,it could not produce sporogenous cells,the pollen sacs and pollen grains,and completely aborted.

Key concepts: Tapetum, Microspore, Stamen, Pollen, Brassica, Biology, Meiosis, Botany

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