Evolution of theDrosophila obscuraSpecies Group Inferred from theGpdhandSodGenes

Barrio, Eladio; Ayala, Francisco J.

doi:10.1006/mpev.1996.0375

Cited by 42 publications

(20 citation statements)

References 36 publications

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“…The first was developed for phylogenetics for this study, as a single-copy nuclear gene with the appropriate level of divergence among the target taxa; unlike the commonly used EF1-alpha, it does not occur in multiple copies (at least in Drosophila), and evolves at a faster rate in the target taxa (it has not been used in other studies for more general comparison). The other genes have been used previously in phylogenetics of Drosophila and other Diptera (Barrio and Ayala, 1997;Bonacum et al, 2005;Ho et al, 1996;Kopp, 2006;Lapoint et al, 2011). Several additional genes (CAD, Marf, ITS-1, and Dip3) were screened on a representative subsample of the ingroup, but did not provide enough informative characters to be useful at this level of phylogenetic analysis.…”

Section: Gene Selection Pcr and Sequencingmentioning

confidence: 99%

Rapid adaptive radiation and host plant conservation in the Hawaiian picture wing Drosophila (Diptera: Drosophilidae)

Magnacca

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2015

Molecular Phylogenetics and Evolution

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Section: Gene Selection Pcr and Sequencingmentioning

confidence: 99%

Rapid adaptive radiation and host plant conservation in the Hawaiian picture wing Drosophila (Diptera: Drosophilidae)

Magnacca

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2015

Molecular Phylogenetics and Evolution

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“…At the center of our considerations stands the D. obscura species group, which for many decades has served as a model system for phylogenetic studies (Lakovaara et al 1976;Cabrera et al 1983;Cariou et al 1988;Goddard et al 1990;González et al 1990;Brehm and Krimbas 1993;Barrio et al 1994;Barrio and Ayala 1997;Watabe et al 1997;Ramos-Onsins et al 1998;O'Grady 1999). The obscura group comprises 38 species, which can be assigned to five major subgroups (Barrio et al 1994): obscura, subobscura (both Palearctic), pseudoobscura (Nearctic), affinis (Nearctic, with the exception of the Palearctic D. helvetica), and microlabis (Africa).…”

Section: Introductionmentioning

confidence: 99%

The evolutionary life history of P transposons: from horizontal invaders to domesticated neogenes

et al. 2001

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P elements, a family of DNA transposons, are known as aggressive intruders into the hitherto uninfected gene pool of Drosophila melanogaster. Invading through horizontal transmission from an external source they managed to spread rapidly through natural populations within a few decades. Owing to their propensity for rapid propagation within genomes as well as within populations, they are considered as the classic example of selfish DNA, causing havoc in a genomic environment permissive for transpositional activity. Tracing the fate of P transposons on an evolutionary scale we describe different stages in their evolutionary life history. Starting from horizontal transfer events, which now appear to be rather a common phenomenon, the initial transpositional burst in the new host is slowed down by the accumulation of defective copies as well as host-directed epigenetic silencing. This leads to the loss of mobility and, finally, to molecular erosion by random mutations. Possible escape routes from genomic extinction are the reactivation within the original host genome by recombination or suspension of the repressing regime, horizontal emigration to a virgin gene pool, or genomic integration and acquisition of a novel function as a domesticated host gene.

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“…Distinctions within the Old World members of the obscura subgroup were subsequently recognized, leading to a division of this subgroup into the obscura and subobscura complexes (Lakovaara and Saura 1982). Recent molecular studies suggest that these complexes are themselves distinct subgroups (Barrio et al 1994;Acosta et al 1995;Barrio and Ayala 1997); that proposal is followed here (see Fig. 1).…”

Section: Discussionmentioning

confidence: 76%

“…1). In some analyses it clusters with other subgroups (see Barrio et al 1994; Barrio and Ayala 1997;O'Grady 1998), and in some it is an independent lineage (Cariou et al 1988). An early branching of D. bifasciata from the other species in the obscura group could provide an argument for the divergence of the D. bifasciata P sequences from those of the rest of the obscura species group.…”

Section: Discussionmentioning

confidence: 99%

“…Phylogenetic relationships among species within the obscura group have been studied extensively using morphological (Sturtevant 1942;Buzzati-Traverso and Scossiroli 1955), biogeographical (Throckmorton 1975), electrophoretic (Lakovaara et al 1976;Lakovaara and Saura 1982;Cabrera et al 1983;Loukas et al 1984;Cariou et al 1988;Acosta et al 1995), chromosome (Brehm and Krimbas 1992;Moltó et al 1992;Segarra and Aguadé 1992) DNA/DNA hybridization (Goddard et al 1990), mitochondrial DNA (Latorre et al 1988;González et al 1990;Beckenbach et al 1993;Barrio et al 1994), and nuclear DNA (Barrio and Ayala 1997) data. Although the phylogeny of the obscura species group is by no means completely resolved, there is general support for the existence of five subgroups: obscura, subobscura, and microlabis in the Old World and affinis and pseudoobscura in the New World (Gleason et al 1997;O'Grady 1998).…”

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confidence: 99%

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Molecular Evolution of P Transposable Elements in the Genus Drosophila. II. The obscura Species Group

et al. 1998

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A phylogenetic analysis of P transposable elements in the Drosophila obscura species group is described. Multiple P sequences from each of 10 species were obtained using PCR primers that flank a conserved region of exon 2 of the transposase gene. In general, the P element phylogeny is congruent with the species phylogeny, indicating that the dominant mode of transmission has been vertical, from generation to generation. One manifestation of this is the distinction of P elements from the Old World obscura and subobscura subgroups from those of the New World affinis subgroup. However, the overall distribution of elements within the obscura species group is not congruent with the phylogenetic relationships of the species themselves. There are at least four distinct subfamilies of P elements, which differ in sequence from each other by as much as 34%, and some individual species carry sequences belonging to different subfamilies. P sequences from D. bifasciata are particularly interesting. These sequences belong to two subfamilies and both are distinct from all other P elements identified in this survey. Several mechanisms are postulated to be involved in determining phylogenetic relationships among P elements in the obscura group. In addition to vertical transmission, these include retention of ancestral polymorphisms and horizontal transfer by an unknown mating-independent mechanism.

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Evolution of theDrosophila obscuraSpecies Group Inferred from theGpdhandSodGenes

Cited by 42 publications

References 36 publications

Rapid adaptive radiation and host plant conservation in the Hawaiian picture wing Drosophila (Diptera: Drosophilidae)

Rapid adaptive radiation and host plant conservation in the Hawaiian picture wing Drosophila (Diptera: Drosophilidae)

The evolutionary life history of P transposons: from horizontal invaders to domesticated neogenes

Molecular Evolution of P Transposable Elements in the Genus Drosophila. II. The obscura Species Group

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