Diversification and dispersal of the Hawaiian Drosophilidae: The evolution of Scaptomyza

Lapoint, Richard T.; O’Grady, Patrick M.; Whiteman, Noah K.

doi:10.1016/j.ympev.2013.04.032

Cited by 50 publications

(110 citation statements)

References 76 publications

(121 reference statements)

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“…those with large bodies and more than six rows of acrostichal setulae: Engiscaptomyza, Grimshawomyia, and Titanochaeta) are highly derived within the group, while those with more divergent traits, similar to continental Scaptomyza (Bunostoma, Exalloscaptomyza, and some Elmomyza) are basal, suggesting that the evolution of Scaptomyza has been much more complex than a gradual morphological divergence in Hawaii followed by dispersal of only some more distinct lineages to other areas. This matches previous results (Lapoint et al, 2013;O'Grady and DeSalle, 2008) and will no doubt be a productive area for future research.…”

Section: Discussionsupporting

confidence: 90%

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

Magnacca

Price

2015

Molecular Phylogenetics and Evolution

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Section: Discussionsupporting

confidence: 90%

“…However, it is noteworthy that the date for the Hawaiian Drosophila-Scaptomyza split comes out at a median of 23.4 Mya, similar to the estimates of Lapoint et al (2013). The most Drosophila-like subgenera of Scaptomyza (i.e.…”

Section: Discussionsupporting

confidence: 56%

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

Magnacca

Price

2015

Molecular Phylogenetics and Evolution

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“…Timing of the Evolution of Herbivory in Scaptomyza. A time-calibrated phylogeny of the family Drosophilidae suggests that herbivory evolved in Scaptomyza ca.13.5 million years ago (95% highest posterior density 10.02-17.48 million years ago), overlapping with age ranges inferred from previous analyses (36,61) (Fig. 1).…”

Section: Resultssupporting

confidence: 66%

“…The ancestral feeding niche for the genus Scaptomyza (Drosophilidae) is microbe-feeding, but Scaptomyza use decaying leaves and stems rather than the fermenting fruit used by D. melanogaster and other members of the subgenus Sophophora (29,36). The close association of Scaptomyza with decaying plant tissues may have precipitated the evolution of herbivory <20 MyBP ( Fig.…”

Section: Significancementioning

confidence: 99%

Evolution of herbivory in Drosophilidae linked to loss of behaviors, antennal responses, odorant receptors, and ancestral diet

Goldman-Huertas¹,

Mitchell

Lapoint

et al. 2015

Proc. Natl. Acad. Sci. U.S.A.

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Herbivory is a key innovation in insects, yet has only evolved in onethird of living orders. The evolution of herbivory likely involves major behavioral changes mediated by remodeling of canonical chemosensory modules. Herbivorous flies in the genus Scaptomyza (Drosophilidae) are compelling species in which to study the genomic architecture linked to the transition to herbivory because they recently evolved from microbe-feeding ancestors and are closely related to Drosophila melanogaster. We found that Scaptomyza flava, a leaf-mining specialist on plants in the family (Brassicaceae), was not attracted to yeast volatiles in a four-field olfactometer assay, whereas D. melanogaster was strongly attracted to these volatiles. Yeast-associated volatiles, especially short-chain aliphatic esters, elicited strong antennal responses in D. melanogaster, but weak antennal responses in electroantennographic recordings from S. flava. We sequenced the genome of S. flava and characterized this species' odorant receptor repertoire. Orthologs of odorant receptors, which detect yeast volatiles in D. melanogaster and mediate critical host-choice behavior, were deleted or pseudogenized in the genome of S. flava. These genes were lost step-wise during the evolution of Scaptomyza. Additionally, Scaptomyza has experienced gene duplication and likely positive selection in paralogs of Or67b in D. melanogaster. Olfactory sensory neurons expressing Or67b are sensitive to green-leaf volatiles. Major trophic shifts in insects are associated with chemoreceptor gene loss as recently evolved ecologies shape sensory repertoires.plant-herbivore interactions | gene loss | olfaction | Drosophila melanogaster | Scaptomyza flava U nderstanding the origins and consequences of trophic shifts, especially the transition to herbivory, has been a central problem in evolutionary biology. The paleontological record suggests that evolutionary transitions to herbivory have been rare in insects (1), and the first transitions to herbivory in vertebrates occurred long after the colonization of land (2). However, species radiations result from herbivorous transitions in insects and vertebrates, suggesting that herbivory is a key innovation (3, 4). Identifying functional genomic changes associated with the evolutionary transition to herbivory could yield insight into the mechanisms that have driven their success. However, the origins of the most diverse clades of herbivorous insects are ancient and date to the Jurassic or earlier (5), limiting meaningful genomic comparisons. In contrast, herbivory has evolved more times in Diptera than in any other order (3). The Drosophilidae is an excellent system to study the evolution of herbivory from a functional genomic perspective because it includes several transitions to herbivory, and the genomic model Drosophila melanogaster (6, 7).The transition to herbivory involves adaptations in physiology (8-10), morphology (11), and behavior (12). The evolution of sensory repertoires could reinforce or even precipitate these adapt...

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“…The oldest and most diverse of these is the Hawaiian Drosophilidae, a radiation derived from a common ancestor approximately 25 mya [10], [15], [16]. The Drosophilidae endemic to Hawaii have diversified into two main clades, the Hawaiian Drosophila , or Idiomyia [17], and the genus Scaptomyza (Figure 1).…”

Section: Introductionmentioning

confidence: 99%

Phylogenetics of the Antopocerus-Modified Tarsus Clade of Hawaiian Drosophila: Diversification across the Hawaiian Islands

Lapoint

Magnacca²,

O’Grady

2014

PLoS ONE

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The Hawaiian Drosophilidae radiation is an ecologically and morphologically diverse clade of almost 700 described species. A phylogenetic approach is key to understanding the evolutionary forces that have given rise to this diverse lineage. Here we infer the phylogeny for the antopocerus, modified tarsus and ciliated tarsus (AMC) clade, a lineage comprising 16% (91 of 687 species) of the described Hawaiian Drosophilidae. To improve on previous analyses we constructed the largest dataset to date for the AMC, including a matrix of 15 genes for 68 species. Results strongly support most of the morphologically defined species groups as monophyletic. We explore the correlation of increased diversity in biogeography, sexual selection and ecology on the present day diversity seen in this lineage using a combination of dating methods, rearing records, and distributional data. Molecular dating analyses indicate that AMC lineage started diversifying about 4.4 million years ago, culminating in the present day AMC diversity. We do not find evidence that ecological speciation or sexual selection played a part in generating this diversity, but given the limited number of described larval substrates and secondary sexual characters analyzed we can not rule these factors out entirely. An increased rate of diversification in the AMC is found to overlap with the emergence of multiple islands in the current chain of high islands, specifically Oahu and Kauai.

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Diversification and dispersal of the Hawaiian Drosophilidae: The evolution of Scaptomyza

Cited by 50 publications

References 76 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)

Evolution of herbivory in Drosophilidae linked to loss of behaviors, antennal responses, odorant receptors, and ancestral diet

Phylogenetics of the Antopocerus-Modified Tarsus Clade of Hawaiian Drosophila: Diversification across the Hawaiian Islands

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