Characterization of repeated DNA sequences in genomes of blue-flowered flax

BMC Evolutionary Biology
Nadezhda L BolshevaOlga V Muravenko

Abstract

Members of different sections of the genus Linum are characterized by wide variability in size, morphology and number of chromosomes in karyotypes. Since such variability is determined mainly by the amount and composition of repeated sequences, we conducted a comparative study of the repeatomes of species from four sections forming a clade of blue-flowered flax. Based on the results of high-throughput genome sequencing performed in this study as well as available WGS data, bioinformatic analyses of repeated sequences from 12 flax samples were carried out using a graph-based clustering method. It was found that the genomes of closely related species, which have a similar karyotype structure, are also similar in the repeatome composition. In contrast, the repeatomes of karyologically distinct species differed significantly, and no similar tandem-organized repeats have been identified in their genomes. At the same time, many common mobile element families have been identified in genomes of all species, among them, Athila Ty3/gypsy LTR retrotransposon was the most abundant. The 30-chromosome members of the sect. Linum (including the cultivated species L. usitatissimum) differed significantly from other studied species by a great nu...Continue Reading

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Datasets Mentioned

BETA
CP027619
CP027633

Methods Mentioned

BETA
PCR
electrophoresis

Software Mentioned

BLASTN
RepeatExplorer
TAREAN
Repeat Explorer

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