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11 results for “Gryllus firmus”
Data from: Mapping reduced introgression loci to the X chromosome of the hybridizing field crickets, Gryllus firmus and G. pennsylvanicus
The genomic architecture of barriers to gene exchange during the speciation process is poorly understood. The genomic islands model suggests that loci associated with barriers to gene exchange prevent introgression of nearby genomic regions via linkage disequilibrium. But few analyses of the actual genomic location of non-introgressing loci in closely related species exist. In a previous study Maroja et al. showed that in the hybridizing field crickets, Gryllus firmus and G. pennsylvanicus, 50 non-introgressing loci are localized on two autosomal regions and the X chromosome, but they were not able to map the loci along the X chromosome because they used a male informative cross. Here, we localize the introgressing and non-introgressing loci on the X chromosome and reveal that all X-linked non-introgressing loci are restricted to a 50-cM region with 10 of these loci mapped to a single location. We discuss the implications of this finding to speciation.
Influence of female cuticular hydrocarbon (CHC) profile on male courtship behavior in two hybridizing field crickets Gryllus firmus and Gryllus pennsylvanicus.
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Data from: Mapping reduced introgression loci to the X chromosome of the hybridizing field crickets, Gryllus firmus and G. pennsylvanicus
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Song and morphology data for selection by females on male Gryllus firmus
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Do favored cuticular hydrocarbon profiles signal fertility? Analysis of Gryllus firmus and Gryllus pennsylvanicus
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Data from: Structure of a mosaic hybrid zone between the field crickets Gryllus firmus and G. pennsylvanicus
Hybrid zones provide insight into the nature of species boundaries and the evolution of barriers to gene exchange. Characterizing multiple regions within hybrid zones is essential for understanding both their history and current dynamics. Here, we describe a previously uncharacterized region of a well-studied hybrid zone between two species of field crickets, Gryllus pennsylvanicus and G. firmus. We use a combination of mitochondrial DNA sequencing, morphological data, and modeling of environmental variables to identify the ecological factors structuring the hybrid zone and define patterns of hybridization and introgression. We find an association between species distribution and natural habitat; Gryllus pennsylvanicus occupies natural habitat along forest edges and natural clearings, whereas G. firmus occupies more disturbed areas in agricultural and suburban environments. Hybridization and introgression occur across patch boundaries; there is evidence of substantial admixture both in morphological characters and mtDNA, over a broad geographic area. Nonetheless, the distribution of morphological types is bimodal. Given that F1 hybrids are viable and fertile in the lab, this suggests that strong pre-zygotic barriers are operating in this portion of the hybrid zone.
Data from: Adult social environment alters female reproductive investment in the cricket Gryllus firmus
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Data from: Structure of a mosaic hybrid zone between the field crickets Gryllus firmus and G. pennsylvanicus
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Selection on dispersal drives evolution of metabolic capacities for energy production in female wing‐polymorphic sand field crickets, Gryllus firmus
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Data from: The evolutionary genetics of acquisition and allocation in the wing dimorphic cricket, Gryllus firmus.
The evolutionary trajectories of trade-offs are ultimately governed by the evolution of the underlying physiological processes of the acquisition and subsequent allocation of resources. In this study, we focused directly on acquisition and allocation as traits and estimated their genetic architecture in the trade-off between flight capability and reproduction in the cricket, Gryllus firmus. To determine the evolutionary genetics of acquisition and allocation both within and between resource environments we performed a large-scale quantitative genetic breeding experiment in which families were split over several resource levels. Our findings were fourfold: 1) there was substantial genetic variance in acquisition and allocation; 2) contrary to the assumption of independence between acquisition and allocation, there was a significant genetic correlation between them; 3) the genetic covariance between acquisition and allocation was significantly different in the different food environments, 4) the trade-off, as measured by the genetic correlation between flight muscle mass and ovary mass, was only significant in the food restriction environments. However, when measured directly as the genetic correlation between reproductive allocation and flight allocation, we found a consistent strong negative genetic correlation, demonstrating that when allocation is measured independently of acquisition we find evidence for the trade-off.
Data from: The evolutionary genetics of acquisition and allocation in the wing dimorphic cricket, Gryllus firmus.
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OpenNeuro
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