Foreign DNA introgression caused heritable cytosine demethylation in ribosomal RNA genes of rice |
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| Authors: | Bao Liu Yuzhu Dong Zhenlan Liu Mengyuan He Yingdian Wang |
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| Affiliation: | (1) Institute of Genetics & Cytology, Northeast Normal University, 130024 Changchun, People Republic of China;(2) Department of Biology, Beijing Normal University, 100875 Beijing, People Republic of China;(3) Department of Botany, Iowa State University, Bessey Hall 353, 50011 Ames, Iowa, USA |
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| Abstract: | Significant cytosine demethylation in ribosomal RNA genes (18S or 25S) were detected in all four studied rice lines containing introgressed DNA from wild rice, Zizania latifolia Griseb. In each line, the changed RFLP (restriction fragment length polymorphism) patterns produced with the methylation-sensitive enzyme (HpaII) were identical between two randomly selected individual plants both within and between generations. This indicates that the methylation changes are non-random and stably inherited. Cytosine demethylation in ribosomal RNA genes could be a major cause for the drastically altered phenotypic variations observed in the introgression lines. |
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| Keywords: | cytosine demethylation epigenetics introgression Oryza sativa L. ribosomal RNA genes |
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