Non-Ecological Radiations in Acoustically Communicating Grasshoppers?

Mayer, Frieder; Berger, Dirk; Gottsberger, Brigitte; Schulze, Wolfram

doi:10.1007/978-3-642-12425-9_21

Cited by 20 publications

(31 citation statements)

References 32 publications

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“…In total, we sampled and performed genetic and morphological analyses for 80 individuals (five males and five females per taxon) (Table ). One specimen from Chorthippus apricarius , a species also belonging to the subgenus Glyptobothrus (Mayer, Berger, Gottsberger, & Schulze, ; Nattier et al., ), was used as outgroup in phylogenomic analyses. Subspecies codes and further information on sampling locations are given in Table .…”

Section: Methodsmentioning

confidence: 99%

Integrating genomic and phenotypic data to evaluate alternative phylogenetic and species delimitation hypotheses in a recent evolutionary radiation of grasshoppers

Noguerales

Ortego

2018

Molecular Ecology

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Although resolving phylogenetic relationships and establishing species limits are primary goals of systematics, these tasks remain challenging at both conceptual and analytical levels. Here, we integrated genomic and phenotypic data and employed a comprehensive suite of coalescent-based analyses to develop and evaluate competing phylogenetic and species delimitation hypotheses in a recent evolutionary radiation of grasshoppers (Chorthippus binotatus group) composed of two species and eight putative subspecies. To resolve the evolutionary relationships within this complex, we first evaluated alternative phylogenetic hypotheses arising from multiple schemes of genomic data processing and contrasted genetic-based inferences with different sources of phenotypic information. Second, we examined the importance of number of loci, demographic priors, number and kind of phenotypic characters and sex-based trait variation for developing alternative species delimitation hypotheses. The best-supported topology was largely compatible with phenotypic data and showed the presence of two clades corresponding to the nominative species groups, one including three well-resolved lineages and the other comprising a four-lineage polytomy and a well-differentiated sister taxon. Integrative species delimitation analyses indicated that the number of employed loci had little impact on the obtained inferences but revealed the higher power provided by an increasing number of phenotypic characters and the usefulness of assessing their phylogenetic information content and differences between sexes in among-taxa trait variation. Overall, our study highlights the importance of integrating multiple sources of information to test competing phylogenetic hypotheses and elucidate the evolutionary history of species complexes representing early stages of divergence where conflicting inferences are more prone to appear.

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Section: Methodsmentioning

confidence: 99%

Integrating genomic and phenotypic data to evaluate alternative phylogenetic and species delimitation hypotheses in a recent evolutionary radiation of grasshoppers

Noguerales

Ortego

2018

Molecular Ecology

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“…The gomphocerine grasshoppers represent an evolutionary successful group in terms of species richness. Several recent radiations lead to species flocks of numerous species that are genetically weakly differentiated (Mayer et al 2010;Vedenina & Mugue 2011). Closely related species in this group are most conspicuously differentiated by male species-specific courtship songs and matching preferences of conspecific females, which represent an effective premating barrier.…”

Section: Introductionmentioning

confidence: 99%

A population genomic scan in Chorthippus grasshoppers unveils previously unknown phenotypic divergence

et al. 2015

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Understanding the genetics of speciation and the processes that drive it is a central goal of evolutionary biology. Grasshoppers of the Chorthippus species group differ strongly in calling song (and corresponding female preferences) but are exceedingly similar in other characteristics such as morphology. Here, we performed a population genomic scan on three Chorthippus species (Chorthippus biguttulus, C. mollis and C. brunneus) to gain insight into the genes and processes involved in divergence and speciation in this group. Using an RNA-seq approach, we examined functional variation between the species by calling SNPs for each of the three species pairs and using FST -based approaches to identify outliers. We found approximately 1% of SNPs in each comparison to be outliers. Between 37% and 40% of these outliers were nonsynonymous SNPs (as opposed to a global level of 17%) indicating that we recovered loci under selection. Among the outliers were several genes that may be involved in song production and hearing as well as genes involved in other traits such as food preferences and metabolism. Differences in food preferences between species were confirmed with a behavioural experiment. This indicates that multiple phenotypic differences implicating multiple evolutionary processes (sexual selection and natural selection) are present between the species.

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“…Since the habitat of Dichopetala species is in many cases very similar, it can be assumed that the environment does not play a major role in differentiation of taxa within this group, but that reproductive isolation is largely ethological. Non-ecological radiation has already been investigated and confirmed in recent studies on Gomphocerinae Orthoptera (Mayer et al 2010). In Dichopetala, the study of acoustic behaviour in different species and populations would add useful information that may be used to decide for or against a generic revision.…”

Section: Discussionmentioning

confidence: 95%

Bioacoustics of Some Mexican Orthoptera (Insecta: Orthoptera: Ensifera, Caelifera)

Buzzetti

Barrientos-Lozano²

2011

Bioacoustics

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Non-Ecological Radiations in Acoustically Communicating Grasshoppers?

Cited by 20 publications

References 32 publications

Integrating genomic and phenotypic data to evaluate alternative phylogenetic and species delimitation hypotheses in a recent evolutionary radiation of grasshoppers

Integrating genomic and phenotypic data to evaluate alternative phylogenetic and species delimitation hypotheses in a recent evolutionary radiation of grasshoppers

A population genomic scan in Chorthippus grasshoppers unveils previously unknown phenotypic divergence

Bioacoustics of Some Mexican Orthoptera (Insecta: Orthoptera: Ensifera, Caelifera)

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