中国水稻科学
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  2007, Vol. 21 Issue (5): 500-506     DOI:
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Influence of Genetic Drift of Restoring Gene on Seed Purity of Yuetai A,a Honglian-Type Cytoplasmic Male Sterile Line
WANG Ji-feng , LU Zuo-mei
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Abstract 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%.
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WANG Ji-feng
LU Zuo-mei
Key wordsseed purity   restoring gene   sterile stability   iso-cytoplasm restoring-generations   Honglian-type cytoplasmic male sterile line     
Received: 1900-01-01;
Corresponding Authors: LU Zuo-mei   
Cite this article:   
WANG Ji-feng ,LU Zuo-mei. Influence of Genetic Drift of Restoring Gene on Seed Purity of Yuetai A,a Honglian-Type Cytoplasmic Male Sterile Line[J]. , 2007, 21(5): 500-506 .
 
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