作者: Stefanie Wagner , Christophe Plomion , Ludovic Orlando
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摘要: The ultra-short DNA molecules still preserved in archaeological remains can provide invaluable genetic information about past individuals, species and communities within the half to one-million-year time range. sequence data are, however, generally affected by post-mortem damage include specific patterns of nucleotide mis-incorporations, which help authentication. Recent work ancient mammals has shown that such also assess levels methylation CpG contexts. Despite pioneering barley sorghum, epigenetic marks have received limited attention plants it unknown whether signatures be retrieved any three main contexts (CG, CHG CHH). To address this question, we extended a statistical score originally proposed trace cytosine mammal accommodate plant-specific We applied range tissues (wood, cobs grains) (oak, maize barley), spanning both desiccated waterlogged samples. Ancient obtained for USER-treated extracts yielded scores on par with modern organellar nuclear genomes. At quantitative level, were (1) positively correlated deamination, (2) replicated relative contributions CG, CHH assessed bisulfite sequencing plant tissues. This demonstrates genuine characterized remains, opens new avenues investigating evolutionary response farming, pollution, epidemics changing environmental conditions.