%0 Journal Article %A WANG Ji-feng %A LU Zuo-mei %T Influence of Genetic Drift of Restoring Gene on Seed Purity of Yuetai A,a Honglian-Type Cytoplasmic Male Sterile Line %D 2007 %R %J Chinese Journal OF Rice Science %P 500-506 %V 21 %N 5 %X Seed samples of Yuetai A,a Honglian-type cytoplasmic male sterile(CMS) line were investigated to assess the seed purity and to analyze the cause of off-types by imitating the biological contaminant to Yuetai A in Nanjing,Jiangsu Province and Lingshui,Hainan Province in 2004-2006.The results showed that male sterility of Yuetai A was stable and seed impurity of Yuetai A resulted mainly from genetic drift of restoring-gene(Rf-gene) after biological contaminant.All of maintainer lines,restorer lines and thermo-sensitive genic male sterile(TGMS) lines used in the study could pollinate Yuetai A by directly penetrating Rf-gene into Yuetai A or pollinate Yuetai B led to Rf-gene into Yuetai A indirectly,and then produce F1 plants and ’iso-cytoplasm restoring-generations’.Furthermore,Yuetai A was easily outcrossing and simultaneous heading with many materials used in hybrid rice seed production,which resulted in high biological contaminant rate.After picking out all plants with Rf-gene mixed in Yuetai A and preventing Rf-gene from drifting into Yuetai A,the seed purity of Yuetai A and Yuetai B had been raised to 100%. %U http://www.ricesci.cn/EN/abstract/article_1661.shtml