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Position: Home > Articles > Influence of genetic drift of restoring gene (Rf) on seed purity of Yuetai A, a Honglian-type cytoplasmic male sterile line in hybrid rice. Rice Science 2008,15 (2) 101-109

Influence of genetic drift of restoring gene (Rf) on seed purity of Yuetai A, a Honglian-type cytoplasmic male sterile line in hybrid rice.

作者：

Wang JiFeng;Lu ZuoMei

单位：

Nanjing 210095; China;State Key Laboratory of Crop Genetics Germplasm Enhancement; Nanjing Agricultural University

关键词：

cultivars;cytoplasm;genes;genetic drift;hybrids;male sterility;pollination;rice;seeds;Oryza;Oryza sativa;China;Hainan;Jiangsu

摘要：

The seed samples of Yuetai A, a Honglian (HL) type cytoplasmic male sterile (CMS) line in hybrid rice were investigated to assess the seed purity and to analyze the cause of off-type plants by imitating the biological contaminant to Yuetai A in Nanjing, Jiangsu Province and Lingshui, Hainan Province during 2004-2006. The seed impurity of Yuetai A mainly resulted from the genetic drift of restoring fertility gene (Rf) after biological contamination but not from its sterility unstability. All of the ten maintainer lines, five restorer lines and three thermo-sensitive genic male sterile lines used in the study could pollinate Yuetai A and Yuetai B to produce F₁ plants, directly or indirectly resulting in Rf-gene drifting into Yuetai A and generating 'iso-cytoplasm restoring-generations'. Furthermore, high outcrossing rate and similar heading date of Yuetai A with many varieties used in rice production might easily result in the biological contamination. After removing all plants with Rf-gene mixed in Yuetai A and preventing Rf-gene drifting into Yuetai A, the seed purity of Yuetai A and Yuetai B had been raised to 100%.

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Influence of genetic drift of restoring gene (Rf) on seed purity of Yuetai A, a Honglian-type cytoplasmic male sterile line in hybrid rice.

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