The High-Quality Genome Sequence of the Oceanic Island Endemic Species Drosophila guanche Reveals Signals of Adaptive Evolution in Genes Related to Flight and Genome Stability.

摘要: Drosophila guanche is a member of the obscura group that originated in Canary Islands archipelago upon its colonization by D. subobscura. It evolved into new species laurisilva, laurel forest present wet regions islands have only minor long-term weather fluctuations. Oceanic island endemic such as can become model to investigate not relative role drift and adaptation speciation processes but also how population size affects nucleotide variation. Moreover, previous identification two satellite DNAs makes this attractive for studying centromeric DNA evolves. As prerequisite establishment suitable address all these questions, we generated high-quality genome sequence composed 42 cytologically mapped scaffolds, which are assembled six super-scaffolds (one per chromosome). The comparative analysis proteome with twelve other identified 151 genes were subject adaptive evolution lineage, subset them being involved flight stability. For example, Centromere Identifier (CID) protein, directly interacting DNA, shows signals species. Both genomic analyses FISH satellites would support an ongoing replacement guanche.