Scaffolding Optimal pour les Régions Répétées Inverses-Complémentaires de Génome de Chloroplastes

International audienceScaffolding step in the genome assembly aims to determine the order and the orientation of a huge number of previously assembled genomic fractions (contigs/scaffolds). Here we introduce a particular case of this problem and denote it by Nested Inverted Fragments Scaffolding (NIFS). We formulate it as an optimisation problem in a particular kind of directed graph that we call Multiplied Doubled Contigs Graph (MDCG). Furthermore, we prove that the NIFS problem is NP-Hard. We also discuss how the chloroplast data have been generated by filtering the reads sequenced both from plants and chloroplasts. Moreover, we propose a graph structure to visualise the solution and to highlight the particularity of chloroplast's regions structure