Adaptation and speciation of Dolichopoda cave crickets (Orthoptera, Rhaphidophoridae): geographic variation of morphometric indices and allozyme frequencies

Allegrucci, Giuliana; Cesaroni, Donatella; Sbordoni, Valerio

doi:10.1111/j.1095-8312.1987.tb01986.x

Cited by 37 publications

(26 citation statements)

References 20 publications

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“…In such situations, genetic distance could represent a rough indicator of the interbreeding potential. Examples are the positive relationship between sexual isolation and allozyme genetic distance in Drosophila (Coyne & Orr, 1989a, b) and a similar relationship found between evolutionary time and genetic divergence leading to postzygotic isolation in studies of cave populations (Sbordoni, 1982;Sbordoni et al, 1987).…”

Section: Evolutionary Relationshipsmentioning

confidence: 81%

Patterns of evolution and multidimensional systematics in graylings (Lepidoptera: Hipparchia)

Cesaroni¹,

Lucarelli²,

Allori³

et al. 1994

Biological Journal of the Linnean Society

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The difficult and controversial attribution of Hipparchia (Parahipparchia) populations to species or subspecies rank led us to use a comparative, quantitative approach to clarify evolutionary and taxonomic relationships among taxa. Seventeen populations from the Mediterranean area belonging to nine presumptive species or subspecies were sampled, and multivariate analyses were employed to study three character sets: allozymes, morphometric profiles of male genitalia, and quantitative descriptors of wing pattern and shape. Comparative analyses of distance matrices, trees and ordination patterns enabled us to outline evolutionary relationships among taxa and to assess the relative value of each character set. Congruent relationships among taxa were obtained from allozymes and male genital morphometrics, suggesting that divergence in genital morphology is a fairly good marker of the overall genetic divergence. O n the other hand, discordant results from wing pattern descriptors suggest these might be subjected to different evolutionary trajectories and rates because of their particular adaptive significance, and might not represent reliable tracers of phylogeny.

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Section: Evolutionary Relationshipsmentioning

confidence: 81%

Patterns of evolution and multidimensional systematics in graylings (Lepidoptera: Hipparchia)

Cesaroni¹,

Lucarelli²,

Allori³

et al. 1994

Biological Journal of the Linnean Society

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“…Numerous studies have measured levels of genetic differentiation among naturally occurring local populations using different types of molecular and phenotypic data (Turner, 1974;Lessios, 1981;Ritland and Jain, 1984;Schwaegerle et al, 1986;Allegrucci et al, 1987;Baker, 1992;Castric et al, 2001). In each of these studies, genetic divergence among populations was measured; however, determining the relative influence of different evolutionary processes in producing this genetic divergence has been substantially more difficult.…”

Section: Introductionmentioning

confidence: 99%

Molecular and quantitative genetic divergence among populations of house mice with known evolutionary histories

et al. 2005

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Evolutionary biologists have long been interested in the processes influencing population differentiation, but separating the effects of neutral and adaptive evolution has been an obstacle for studies of population subdivision. A recently developed method allows tests of whether disruptive (ie, spatially variable) or stabilizing (ie, spatially uniform) selection is influencing phenotypic differentiation among subpopulations. This method, referred to as the F ST vs Q ST comparison, separates the total additive genetic variance into within-and among-population components and evaluates this level of differentiation against a neutral hypothesis. Thus, levels of neutral molecular (F ST ) and quantitative genetic (Q ST ) divergence are compared to evaluate the effects of selection and genetic drift on phenotypic differentiation. Although the utility of such comparisons appears great, its accuracy has not yet been evaluated in populations with known evolutionary histories. In this study, F ST vs Q ST comparisons were evaluated using laboratory populations of house mice with known evolutionary histories. In this model system, the F ST vs Q ST comparisons between the selection groups should reveal quantitative trait differentiation consistent with disruptive selection, while the F ST vs Q ST comparisons among lines within the selection groups should suggest quantitative trait differentiation in agreement with drift. We find that F ST vs Q ST comparisons generally produce the correct evolutionary inference at each level in the population hierarchy. Additionally, we demonstrate that when strong selection is applied between populations Q ST increases relative to Q ST among populations diverging by drift. Finally, we show that the statistical properties of Q ST , a variance component ratio, need further investigation. Heredity (2005) 94, 518-525.

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“…The analysis of these data has produced results which partially clash with the current taxonomic order. In particular the geniculata-laetitiae complex appears to be a genetically homogeneous group of populations, where a certain degree of genetic differentiation and reproductive isolation appears to have been reached (Sbordoni et al, 1987). Comparing Dolichopoda, Troglophilus and Tachycines some conclusions can be drawn.…”

Section: Discussionmentioning

confidence: 96%

“…In the last few years, this complex has been the subject of many studies including enzymatic polymorphisms, kariotype analysis, the external morphometry and the morphology and morphometry of the epiphallus (Sbordoni et al, 1985;Allegrucci et al, 1987;Cesaroni et al, 1989;Bianchi et al, pers. comm., data unpublished).…”

Section: Discussionmentioning

confidence: 99%

Observations on the egg ultrastructure of some rhaphidophoridae (orthoptera) of the mediterranean area

Rampini

Saltini

1994

Bolletino di zoologia

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The scanning electron microscope study of the eggs of seven species of cave Orthoptera belonging to the family Rhaphidophoridae has shown a series of characters useful for taxonomic purposes. The eggs studied belong to four species of the genus Troglophilus, one of the genus Tacbycines and three of the genus Dolichopoda. All the studied species show cylindrical eggs with an external surface formed by polygonal fields delimited by emerging ridges of different size. Aeropyles are widespread on the egg surface and cross the chorionic layers by means of little canals. In each genus, the micropylar areas are located in the equatorial zone of the eggs and are of typical «rosette» shape. However the numbers of this structure vary significantly among the different species. Furthermore, micropylar canals and the inner layer of the chorion show different patterns in the three studied genera. These results are discussed on the basis of present knowledge of the phylogenetic relationships and the biogeography of these cave crickets.

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Adaptation and speciation of Dolichopoda cave crickets (Orthoptera, Rhaphidophoridae): geographic variation of morphometric indices and allozyme frequencies

Cited by 37 publications

References 20 publications

Patterns of evolution and multidimensional systematics in graylings (Lepidoptera: Hipparchia)

Patterns of evolution and multidimensional systematics in graylings (Lepidoptera: Hipparchia)

Molecular and quantitative genetic divergence among populations of house mice with known evolutionary histories

Observations on the egg ultrastructure of some rhaphidophoridae (orthoptera) of the mediterranean area

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