Molecular structure, comparative and phylogenetic analysis of the complete chloroplast genome sequences of weedy rye Secale cereale ssp. segetale

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Abstract
The complete chloroplast genome of Secale cereale ssp. segetale (Zhuk.) Roshev. (Poaceae: Triticeae) was sequenced and analyzed to better use its genetic resources to enrich rye and wheat breeding. The study was carried out using the following methods: DNA extraction, sequencing, assembly and annotation, comparison with other complete chloroplast genomes of the five Secale species, and multigene phylogeny. As a result of the study, it was determined that the chloroplast genome is 137,042 base pair (bp) long and contains 137 genes, including 113 unique genes and 24 genes which are duplicated in the IRs. Moreover, a total of 29 SSRs were detected in the Secale cereale ssp. segetale chloroplast genome. The phylogenetic analysis showed that Secale cereale ssp. segetale appeared to share the highest degree of similarity with S. cereale and S. strictum. Intraspecific diversity has been observed between the published chloroplast genome sequences of S. cereale ssp. segetale. The genome can be accessed on GenBank with the accession number (OL688773).

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