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《Acta Botanica Boreali-Occidentalia Sinica》 2008-04
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Anther Development of Pol CMS and Its Corresponding Maintainer Line in Autotetraploid Non-Heading Chinese Cabbage

TANG Wei-hua,ZHANG Shu-ning,KONG Yan-e(State Key Laboratory of Crop Genetics and Germplasm Enhancement,Nanjing Agricultural University,Nanjing 210095,China)  
Anther development was observed using a light microscope through paraffin slices on the Pol CMS and its corresponding maintainer line in autotetraploid non-heading Chinese cabbage,which were induced from the diploid Pol CMS and the corresponding maintainer line by colchicines.The result indicated there was a difference on anther development between Pol CMS and its corresponding maintainer line.The anther development of the autotetraploid Pol CMS was inhibited at the stage of archesporial cell,at which there was no anther sac formed and no differentiation of sporogenous cell.A few anthers of autotetraploid Pol CMS could produce one or two anther sacs under low temperature,which decreased the number of mature pollens due to the tapetum degradation earlier than the normal in the one tetrad stage.The anther development of autotetraploid Pol CMS maintainer line was similar to that of diploid,among which the microspores in autotetraploid were larger than those in diploid with mainly four germination apertures,one more than that in diploid in the same stage.In the same anther sac of autotetraploid Pol CMS maintainer line,the development of pollen grains wasn't synchronized and the frequence of pollen abortion was higher than that in diploid maintainer line.The study showed the autotetraploid Pol CMS had more thorough sterility and wider application than diploid Pol CMS.
【Fund】: 江苏省自然科学基金项目(SBK20082174)
【CateGory Index】: S634
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