吉林省农业科学院机构知识库

Endosperm-specific hypomethylation, and meiotic inheritance and variation of DNA methylation level and pattern in sorghum (Sorghum bicolor L.) inter-strain hybrids

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文献类型：外文期刊

作者： Zhang, M. S. ¹ ; Yan, H. Y. ² ; Zhao, N. ² ; Lin, X. Y. ³ ; Pang, J. S.; Xu, K. Z.; Liu, L. X.; Liu, B.;

作者机构： 1.NE Normal Univ, Inst Cytol & Genet, Lab Plant Mol Epigenet, Changchun 130024, Peoples R China

2.NE Normal Univ, Inst Cytol & Genet, Lab Plant Mol Epigenet, Changchun 130024, Peoples R China; Jilin Agr Univ, Dept Agron, Changchun 130118, Peoples R China; Jilin Acad Agr Sci, Inst Crop Sci, Gongzhuling 136100, Peoples R China; NE Normal Univ, Key Lab Vegetat Ecol MOE, Changchun 130024, Peoples R China; NE Normal Univ, Key Lab Appl Stat MOE, Changchun 130024, Peoples R China

3.NE Normal Univ, Inst Cytol & Genet, Lab Plant Mol Epigenet, Changchun 130024, Peoples R China; Jilin Agr Univ, Dept Agron, Changchun 130118, Peoples R China; Jilin Aca

关键词： Azacitidine pharmacology;DNA Methylation;Epigenesis;Genetic;Hybridization;Genetic;Inheritance Patterns;Meiosis genetics;Plant Leaves drug effects genetics metabolism;RNA metabolism;Seeds genetics;Sorghum embryology genetics metabolism;Stochastic Processes

期刊名称：THEORETICAL AND APPLIED GENETICS （影响因子：5.699；五年影响因子：5.565 ）

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收录情况： SCI

摘要： Understanding dynamics and inheritance of DNA methylation represents important facets for elucidating epigenetic paradigms in plant development and evolution. Using four sets of sorghum (Sorghum bicolor L.) inter-strain hybrids and their inbred parents, the developmental stability and inheritance of cytosine methylation in two tissues, leaf and endosperm, by MSAP analysis were investigated. It was found that in all lines (inbred and hybrid) studied, endosperm exhibited a markedly reduced level of full methylation of the external cytosine or both cytosines at the CCGG sites relative to leaf, which caused a variable reduction in the estimated total methylation level in endosperm by 6.89-19.69% (11.47% on average). For both tissues, a great majority of cytosine methylation profiles transmitted to F1 hybrids, however, from 1.69 to 3.22% of the profiles showed altered patterns in hybrids. Both inherited and altered methylation profiles can be divided into distinct groups, and their frequencies are variable among the cross-combinations, and between the two tissues. The variations in methylation level and pattern detected in the hybrids were not caused by parental heterozygosity, and they could be either non-random or stochastic among hybrid individuals. Homology analysis of isolated bands that showed endosperm-specific hypomethylation or variation in hybrids indicated that diverse sequences were involved, including known-function cellular genes and mobile elements. RT-PCR analysis of six genes representing endosperm-specific hypomethylation in MSAP profiles indicated that all showed higher expression in endosperm than in leaf, suggesting involvement of methylation state in regulating tissue-specific or tissue-biased expression in sorghum. Analysis on leaf-RNA from 5-azacytidine-treated plants further corroborated this possibility.

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Endosperm-specific hypomethylation, and meiotic inheritance and variation of DNA methylation level and pattern in sorghum (Sorghum bicolor L.) inter-strain hybrids

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Comparative analyses of genetic/epigenetic diversities and structures in a wild barley species (Hordeum brevisubulatum) using MSAP, SSAP and AFLP

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