The evolutionary history of three Baracoffea species from western Madagascar revealed by chloroplast and nuclear genomes.

The wild species of the Coffea genus present a very wide morphological, genetic, and biochemical diversity. Wild species are recognized more resistant to diseases, pests, and environmental variations than the two species currently cultivated worldwide: C. arabica (Arabica) and C.

High nucleotide similarity of three lineage LTR retrotransposons among plant genomes.

Transposable elements (TEs) are mobile elements found in the majority of eukaryotic genomes. TEs deeply impact the structure and evolution of chromosomes and can induce mutations affecting coding genes. In plants, the major group of TEs is long terminal repeat retrotransposons (LTR-RTs).

Phylogenetic analysis of the superfamily reveals the unexplored diversity of -like elements.

Background: transposons are widespread DNA transposable elements (TEs) that have made important contributions to the evolution of host genomic complexity in metazoans. However, the evolution and diversity of the superfamily remains poorly understood. Following recent developments in genome sequencing and the availability of a wealth of new genomes, TEs have been identified in many new taxa across the eukaryotic tree of life.

Evolution of transposable elements across eukaryotic diversity.

Background: -like elements (MULEs) are a significant superfamily of DNA transposons on account of their: (i) great transpositional activity and propensity for insertion in or near gene sequences, (ii) their consequent high mutagenic capacity, and, (iii) their tendency to acquire host gene fragments. Consequently, MULEs are important genetic tools and represent a key study system for research into host-transposon interactions. Yet, while several studies have focused on the impacts of MULEs on crop and fungus genomes, their evolution remains poorly explored.

Distribution of Divo in Coffea genomes, a poorly described family of angiosperm LTR-Retrotransposons.

Coffea arabica (the Arabica coffee) is an allotetraploid species originating from a recent hybridization between two diploid species: C. canephora and C. eugenioides.

Partial sequencing reveals the transposable element composition of Coffea genomes and provides evidence for distinct evolutionary stories.

The Coffea genus, 124 described species, has a natural distribution spreading from inter-tropical Africa, to Western Indian Ocean Islands, India, Asia and up to Australasia. Two cultivated species, C. arabica and C.

Horizontal transfer of transposons between and within crustaceans and insects.

Background: Horizontal transfer of transposable elements (HTT) is increasingly appreciated as an important source of genome and species evolution in eukaryotes. However, our understanding of HTT dynamics is still poor in eukaryotes because the diversity of species for which whole genome sequences are available is biased and does not reflect the global eukaryote diversity.

Results: In this study we characterized two Mariner transposable elements (TEs) in the genome of several terrestrial crustacean isopods, a group of animals particularly underrepresented in genome databases.