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

TY - JOUR

T1 - 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

AU - Puerma, Eva

AU - Orengo, Dorcas J

AU - Cruz, Fernando

AU - Gómez-garrido, Jèssica

AU - Librado, Pablo

AU - Salguero, David

AU - Papaceit, Montserrat

AU - Gut, Marta

AU - Segarra, Carmen

AU - Alioto, Tyler S

AU - Aguadé, Montserrat

AU - Gonzalez, Josefa

PY - 2018/8/1

Y1 - 2018/8/1

N2 - Drosophila guanche is amember of the obscura group that originated in theCanary Islands archipelago upon its colonization by D. subobscura. It evolved into a new species in the laurisilva, a laurel forest present in wet regions that in the islands have onlyminor long-Term weather fluctuations.Oceanic island endemic species such as D. guanche can becomemodel species to investigate not only the relative role of drift and adaptation in speciation processes but also how population size affects nucleotide variation.Moreover, the previous identification of two satellite DNAs in D. guanchemakes this species attractive for studying how centromeric DNA evolves. As a prerequisite for its establishment as a model species suitable to address all these questions, we generated a high-quality D. guanche genome sequence composed of 42 cytologically mapped scaffolds, which are assembled into six super-scaffolds (one per chromosome). The comparative analysis of the D. guanche proteomewith that of twelve other Drosophila species identified 151 genes thatwere subject to adaptive evolution in the D. guanche lineage,with a subset of thembeing involved in flight and genome stability. For example, theCentromere Identifier (CID) protein, directly interacting with centromeric satellite DNA, shows signals of adaptation in this species. Both genomic analyses and FISH of the two satellites would support an ongoing replacement of centromeric satellite DNA in D. guanche.

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

U2 - 10.1093/gbe/evy135

DO - 10.1093/gbe/evy135

M3 - Journal article

C2 - 29947749

SN - 1759-6653

VL - 10

SP - 1956

EP - 1969

JO - Genome Biology and Evolution

JF - Genome Biology and Evolution

IS - 8

ER -