Pattern of ecological shifts in the diversification of Hawaiian Drosophila inferred from a molecular phylogeny

Kambysellis, Michael P.; Ho, Kin Fan; Craddock, Elysse M.; Piano, Fabio; Parisi, Michael; Cohen, J.

doi:10.1016/s0960-9822(95)00229-6

Cited by 103 publications

(140 citation statements)

References 22 publications

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“…Experiments aimed at the identification of these regulatory regions are currently under way in our group (Fuchs et al, 2012). Future studies of these regions and their control by signaling pathways will provide crucial tests of the model and are likely to shed light on the mechanisms responsible for diversification of Drosophila eggshell morphologies (Hinton, 1981;Kambysellis et al, 1995;James and Berg, 2003;Nakamura and Matsuno, 2003;Nakamura et al, 2007;Kagesawa et al, 2008). …”

Section: Discussionmentioning

confidence: 99%

EGFR-dependent network interactions that pattern Drosophila eggshell appendages

et al. 2012

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SUMMARYSimilar to other organisms, Drosophila uses its Epidermal Growth Factor Receptor (EGFR) multiple times throughout development. One crucial EGFR-dependent event is patterning of the follicular epithelium during oogenesis. In addition to providing inductive cues necessary for body axes specification, patterning of the follicle cells initiates the formation of two respiratory eggshell appendages. Each appendage is derived from a primordium comprising a patch of cells expressing broad (br) and an adjacent stripe of cells expressing rhomboid (rho). Several mechanisms of eggshell patterning have been proposed in the past, but none of them can explain the highly coordinated expression of br and rho. To address some of the outstanding issues in this system, we synthesized the existing information into a revised mathematical model of follicle cell patterning. Based on the computational model analysis, we propose that dorsal appendage primordia are established by sequential action of feed-forward loops and juxtacrine signals activated by the gradient of EGFR signaling. The model describes pattern formation in a large number of mutants and points to several unanswered questions related to the dynamic interaction of the EGFR and Notch pathways.

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Section: Discussionmentioning

confidence: 99%

EGFR-dependent network interactions that pattern Drosophila eggshell appendages

et al. 2012

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“…The isolation of these islands (both from the mainland and from one another), plus the wealth of different habitats available, provides ideal settings for rapid diversification and adaptation (Emerson, 2002). The Hawaiian archipelago, which lies greater than 3700 km from the nearest continental landmass, provides several famous examples of organismal radiations, including Drosophila (Kambysellis et al, 1995), spiders (Gillespie et al, 1994), birds (Lerner et al, 2011), and plants, such as the silversword alliance (Witter and Carr, 1988), and lobelioids (Givnish et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

The quest to resolve recent radiations: Plastid phylogenomics of extinct and endangered Hawaiian endemic mints (Lamiaceae)

Welch

Collins

Drautz–Moses

et al. 2016

Molecular Phylogenetics and Evolution

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(2016) 'The quest to resolve recent radiations : plastid phylogenomics of extinct and endangered Hawaiian endemic mints (Lamiaceae).', Molecular phylogenetics and evolution., 99 . pp. 16-33. Further information on publisher's website: Use policyThe full-text may be used and/or reproduced, and given to third parties in any format or medium, without prior permission or charge, for personal research or study, educational, or not-for-pro t purposes provided that:• a full bibliographic reference is made to the original source • a link is made to the metadata record in DRO • the full-text is not changed in any way The full-text must not be sold in any format or medium without the formal permission of the copyright holders.Please consult the full DRO policy for further details. AbstractThe Hawaiian mints (Lamiaceae), one of the largest endemic plant lineages in the archipelago, provide an excellent system to study rapid diversification of a lineage with a remote, likely paleohybrid origin. Since their divergence from New World mints 4-5 million years ago the members of this lineage have diversified greatly and represent a remarkable array of vegetative and reproductive phenotypes. Today many members of this group are endangered or already extinct, and molecular phylogenetic work relies largely on herbarium samples collected during the last century. So far a gene-by-gene approach has been utilized, but the recent radiation of the Hawaiian mints has resulted in minimal sequence divergence and hence poor phylogenetic resolution. In our quest to trace the reticulate evolutionary history of the lineage, a resolved maternal phylogeny is necessary. We applied a high-throughput approach to sequence 12 complete or nearly complete plastid genomes from multiple Hawaiian mint species and relatives, including extinct and rare taxa. We also targeted 108 hypervariable regions from throughout the chloroplast genomes in nearly all of the remaining Hawaiian species, and relatives, using a nextgeneration amplicon sequencing approach. This procedure generated ~20Kb of sequence data for each taxon and considerably increased the total number of variable sites over previous analyses. Our results demonstrate the potential of high-throughput sequencing of historic material for evolutionary studies in rapidly evolving lineages. Our study, however, also highlights the challenges of resolving relationships within recent radiations even at the genomic level.

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“…It is important to note that these stages are not necessarily discrete and that selection pressures which dominate in one period of a radiation are probably also acting at other times, albeit to a lesser degree [9]. While these hypothesized stages are apparent in some groups, the existence of stages is less clear in other ARs such as Hawaiian drosophilids [15], potentially emphasizing this feature to be unique to vertebrate radiations and definitively calling for further in-depth quantitative evaluations of the 'stages model'.…”

Section: Introductionmentioning

confidence: 99%

Testing the stages model in the adaptive radiation of cichlid fishes in East African Lake Tanganyika

et al. 2014

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Adaptive radiation (AR) is a key process in the origin of organismal diversity. However, the evolution of trait disparity in connection with ecological specialization is still poorly understood. Available models for vertebrate ARs predict that diversification occurs in the form of temporal stages driven by different selective forces. Here, we investigate the AR of cichlid fishes in East African Lake Tanganyika and use macroevolutionary model fitting to evaluate whether diversification happened in temporal stages. Six trait complexes, for which we also provide evidence of their adaptiveness, are analysed with comparative methods: body shape, pharyngeal jaw shape, gill raker traits, gut length, brain weight and body coloration. Overall, we do not find strong evidence for the ‘stages model’ of AR. However, our results suggest that trophic traits diversify earlier than traits implicated in macrohabitat adaptation and that sexual communication traits (i.e. coloration) diversify late in the radiation.

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Pattern of ecological shifts in the diversification of Hawaiian Drosophila inferred from a molecular phylogeny

Cited by 103 publications

References 22 publications

EGFR-dependent network interactions that pattern Drosophila eggshell appendages

EGFR-dependent network interactions that pattern Drosophila eggshell appendages

The quest to resolve recent radiations: Plastid phylogenomics of extinct and endangered Hawaiian endemic mints (Lamiaceae)

Testing the stages model in the adaptive radiation of cichlid fishes in East African Lake Tanganyika

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