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Dramatic genotypic difference in, and effect of genetic crossing on, tissue culture-induced mobility of retrotransposon Tos17 in rice

文献类型： 外文期刊

作者： Lin, Chunjing 1 ; Lin, Xiuyun 2 ; Hu, Lanjuan 1 ; Yang, Jingjing 1 ; Zhou, Tianqi 1 ; Long, Likun 2 ; Xu, Chunming 1 ; Xi 1 ;

作者机构： 1.NE Normal Univ, Key Lab Mol Epigenet MOE, Changchun 130024, Peoples R China

2.Jilin Acad Agr Sci, Changchun 130124, Peoples R China

3.Jilin Agr Univ, Coll Agron, Changchun 130118, Peoples R China

关键词： Tos17 mobility;Tissue culture;Genetic crossing;Epigenetic parent-of-origin effect;Oryza sativa L.

期刊名称：PLANT CELL REPORTS （ 影响因子：4.57； 五年影响因子：4.463 ）

ISSN： 0721-7714

年卷期： 2012 年 31 卷 11 期

页码：

收录情况： SCI

摘要： We show for the first time that intraspecific crossing may impact mobility of the prominent endogenous retrotransposon Tos17 under tissue culture conditions in rice. Tos17, an endogenous copia retrotransposon of rice, is transpositionally active in tissue culture. To study whether there exists fundamental genotypic difference in the tissue culture-induced mobility of Tos17, and if so, whether the difference is under genetic and/or epigenetic control, we conducted this investigation. We show that dramatic difference in tissue culture-induced Tos17 mobility exists among different rice pure-line cultivars sharing the same maternal parent: of the three lines studied that harbor Tos17, two showed mobilization of Tos17, which accrued in proportion to subculture duration, while the third line showed total quiescence (immobility) of the element and the fourth line did not contain the element. In reciprocal F1 hybrids between Tos17-mobile and -immobile (or absence) parental lines, immobility was dominant over mobility. In reciprocal F1 hybrids between both Tos17-mobile parental lines, an additive or synergistic effect on mobility of the element was noticed. In both types of reciprocal F1 hybrids, clear difference in the extent of Tos17 mobility was noted between crossing directions. Given that all lines share the same maternal parent, this observation indicates the existence of epigenetic parent-of-origin effect. We conclude that the tissue culture-induced mobility of Tos17 in rice is under complex genetic and epigenetic control, which can be either enhanced or repressed by intraspecific genetic crossing.

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[1]Limited tissue culture-induced mutations and linked epigenetic modifications in F-1 hybrids of sorghum pure lines are accompanied by increased transcription of DNA methyltransferases and 5-methylcytosine glycosylases. von Wettstein, Diter,Zhang, Meishan,Xu, Chunming,Zhao, Na,Liu, Bao,Zhang, Meishan,Yan, Hongyan. 2009

[2]Mutation of a major CG methylase in rice causes genome-wide hypomethylation, dysregulated genome expression, and seedling lethality. Hu, Lanjuan,Li, Ning,Xu, Chunming,Zhong, Silin,Yang, Jingjing,Zhou, Tianqi,Yuliang, Anzhi,Wu, Ying,Liu, Bao,Zhong, Silin,Chen, Yun-Ru,Lin, Xiuyun,Cao, Xiaofeng,Cao, Xiaofeng,Zemach, Assaf,Rustgi, Sachin,von Wettstein, Diter,Rustgi, Sachin,von Wettstein, Diter,Rustgi, Sachin,von Wettstein, Diter.

[3]Heritable alteration in DNA methylation induced by nitrogen-deficiency stress accompanies enhanced tolerance by progenies to the stress in rice (Oryza sativa L.). Von Wettstein, D.,Kou, H. P.,Li, Y.,Song, X. X.,Ou, X. F.,Liu, B.,Kou, H. P.,Li, Y.,Song, X. X.,Ou, X. F.,Liu, B.,Kou, H. P.,Ma, J.,Xing, S. C.. 2011

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