Revealing the Symmetry of Conifer Transcriptomes through Triplet Statistics

Abstract

The novel powerful technique is used for a study of combinatorial and statistical properties of transcriptome sequences. The main approach stands on the study of distribution of nucleotide triplet frequency dictionaries obtained from the conversion of transcriptome sequences. The distribution is revealed through PCA presentation and elastic map technique. The transcriptomic data of Siberian larch (Larix sibirica Ledeb.) and Siberian pine (Pinus sibirica Du Tour) were studied. The transcriptomes exhibit unusual symmetries. The octahedral structure exhibiting rotational symmetry in transcriptome contig distribution was found for L. sibirica, while mirror symmetry was found for P. sibirica. The octahedron structure seems to be universal for plants.