Journal
GENOME
Volume 49, Issue 1, Pages 91-96Publisher
CANADIAN SCIENCE PUBLISHING
DOI: 10.1139/G05-065
Keywords
Camellia sinensis; 5S rDNA; DNA methylation; restriction endonucleases; molecular marker
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Variability in the organization of repeats of 5S rDNA is useful for phylogenetic studies in various crops. We found variable repeats of 5S rDNA gene in the genome of tea (Camellia sinensis (L.) O. Kuntze) during Southern hybridization. Variability in the repeats of 5S rDNA with specific restriction endonuleases (Sau3AI, BamHI, and ApoI) was analyzed in 28 different tea clones representing 3 types of tea. Our results clearly show that the 5S rDNA gene in tea could be used as a molecular marker to distinguish C. sinensis Chinary tea from the other important types of tea, namely Assamica and Cambod. Upon analysis with restriction endonucleases, the 5S rDNA gene in the tea genome was found to be heavily methylated.
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