Dispersal differences predict population genetic structure in Mormon crickets

Bailey, Nathan W.; Gwynne, Darryl; Ritchie, Michael G.

doi:10.1111/j.1365-294x.2007.03265.x

Cited by 25 publications

(21 citation statements)

References 62 publications

(110 reference statements)

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“…Only patches with six or more sampled individuals were considered in female analyses (Table 1). We used two methods to analyze differences in gene flow (F ST ) between males and females: 1) First, we tested whether there was a significant difference in average pair-wise F ST between males and females (Bailey et al 2007); 2) Second, we used the randomization method implemented in FSTAT version 2.9.3 (10,000 permutations) to analyze differences between sexes in inter-patch genetic differentiation (F ST ) (Goudet 2001;Goudet et al 2002).…”

Section: Genetic Diversity Estimatesmentioning

confidence: 99%

“…Although examples on sex-biased dispersal in animals other than birds and mammals are also growing (e.g. Goodisman and Ross 1998;Gyllenstrand and Seppa 2003;Clemencet et al 2005;Bailey et al 2007;Suni and Gordon 2010), information for certain taxa is still rare and additional research would allow to test genuine predictions about dispersal bias in scarcely explored taxonomic groups (Goudet et al 2002).…”

Section: Introductionmentioning

confidence: 98%

“…The previous studies at a large geographical scale can only provide partial information on contemporary patterns of dispersal and gene flow because most analyzed populations seem to mostly behave as discrete and isolated populations with rare dispersal events among them . The relative dispersal of each sex has been rarely studied in orthoptera (Lorch and Gwynne 2000;Bailey et al 2007), probably due to the difficulty of monitoring marked individuals (e.g. Riegert et al 1954;Lorch et al 2005) together with the lack of suitable nuclear markers necessary to obtain detailed information on fine-scale spatial genetic structure (Ustinova et al 2006;Chapuis et al 2008).…”

Section: Introductionmentioning

confidence: 99%

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Fine-scale spatial genetic structure and within population male-biased gene-flow in the grasshopper Mioscirtus wagneri

2011

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Dispersal is a life history trait that plays a key role in population dynamics, determining gene flow and influencing the size, structure and persistence of populations. For these reasons, the study of the genetic consequences of dispersal can be considered a central topic in both conservation and population genetics. In this study we examine the patterns of fine-scale genetic structure within two populations of the grasshopper Mioscirtus wagneri (Orhoptera: Acrididae). For this purpose, we have used seven species-specific microsatellite markers to type 266 individuals from two populations (Peña Hueca and El Salobral) located in Central Spain. We have found subtle genetic differentiation between some sampling patches and significant kinship structures up to 25 m distance which were particularly patent for females. In Peña Hueca locality, patterns of isolation-by-distance at both the patch scale and the individual level have also revealed an association between genetic differentiation/ similarity and geographical distance in females but not in males. Overall, these data suggest a fine-scale spatial genetic substructure in the studied populations which seems to be mainly driven by female philopatry. Such pattern of within population genetic structure together with the inferred restricted dispersal distances is likely to contribute to reduce effective population sizes and inter-population gene flow. This can erode genetic variability and limit the colonization ability of this orthoptera, factors which can ultimately compromise the long-term persistence of their small size and isolated populations.

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Section: Genetic Diversity Estimatesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

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Fine-scale spatial genetic structure and within population male-biased gene-flow in the grasshopper Mioscirtus wagneri

2011

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“…Although males disperse more than females in most Orthopteran species (e.g. Bailey et al, 2007;Ortego et al, 2011) male-based sampling is not likely to have biased the inferred patterns in genetic structure because the maximum distances dispersed by the species studied are likely to be much shorter than the distances between the populations studied.During spring and summer 2008, we collected samples from populations in France, Spain, Italy, Morocco, Algeria and Uzbekistan (see Fig. 2).…”

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confidence: 99%

Population structures of three Calliptamus spp. (Orthoptera: Acrididae) across the Western Mediterranean Basin

Blanchet¹,

Lecoq²,

Sword³

et al. 2012

Eur. J. Entomol.

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Abstract. We conducted a comparative population genetic analysis of levels of genetic variation and its geographical structuring in three closely related species of grasshopper that co-occur in the Mediterranean Basin: Calliptamus italicus, C. barbarus and C. wattenwylianus. In the western part of their distributions 5 populations of C. italicus, 13 of C. barbarus and 10 of C. wattenwylianus were sampled. Bootstrap re-sampling of populations and microsatellite loci within each species indicated a lower level of genetic diversity and higher level of genetic differentiation in C. barbarus, which is less of an outbreak pest species than either of the other Calliptamus species studied. This may be due to lower effective sizes of non-outbreak populations and/or lower gene flow among them. 445C. wattenwylianus (Pantel, 1896) are syntopic across the western part of Mediterranean Basin. C. italicus and C. barbarus have the widest distributions, from the Mediterranean Basin to southern Siberia, whereas C. wattenwylianus is recorded only along the Mediterranean coasts of France, Spain, Morocco and Algeria. Morphological discrimination between the juvenile stages and adult females of these three closely related species is ambiguous, whereas adult males can be identified based on the shape of their wings and pallium (Jago, 1963;Harz, 1975). However, the three species can be easily differentiated genetically, with sequence divergences in Cytochrome Oxidase I mtDNA estimated to be over 3% (Blanchet et al., 2010b). These three species of grasshopper damage crops (COPR, 1982) and share some general ecological features, such as, a one-year generation time, a seasonal diapause, feed on grass (Poacea) (Chopard, 1951) and a moderate dispersal ability (Reinhardt et al., 2005). Given that these three species co-occur and are closely related, ecological and evolutionary factors that affect one species are likely to affect the others, therefore a comparison of these species might provide insights into the relative importance of the factors that shape genetic structuring (McCoy et al., 2005;Brouat et al., 2007).Although the three species of Calliptamus studied are closely related, ecologically similar, and syntopic, previous studies report fine-scale differences between them in terms of ecological features and neutral genetic variation (see Fig. 1). Firstly, Blanchet et al. (2012) showed that at a scale of 70 km 2 between sites in Southern France, gene flow was restricted only in C. wattenwylianus, a species thought to be relatively sedentary compared to other congeneric species (Chara, 1987). Indeed, Jago (1963) showed that C. italicus and C. barbarus have a higher wing/body length ratio, which is a reliable proxy of dispersal ability, than C. wattenwylianus. Secondly, the same fine-scale microsatellite study highlighted lower levels of genetic diversity in C. barbarus than in C. italicus and C. wattenwylianus. This result suggests that long-term effective sizes of populations of C. barbarus might be lower than those of the other s...

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“…Endogenous selection occurs as a result of morphological, behavioral, and/or genetic incompatibilities between species (Sota and Kubota 1998; Bailey et al. 2007; Macholán et al. 2007), while exogenous selection operates via organismal adaptation to external environments (Vines et al.…”

Section: Introductionmentioning

confidence: 99%

Ecological differentiation and habitat unsuitability maintaining a ground beetle hybrid zone

Yasuda

Osawa

2015

Ecology and Evolution

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Exogenous selection via interactions between organisms and environments may influence the dynamics of hybrid zones between species in multiple ways. Two major models of a hybrid zone allowed us to hypothesize that environmental conditions influence hybrid zone dynamics in two ways. In the first model, an environmental gradient determines the mosaic distribution at the boundary between ecologically differentiated species (mosaic hybrid zone model). In the second model, a patch of unsuitable habitat traps a hybrid zone between species whose hybrids are unfit (tension zone model). To test these, we examined the environmental factors influencing the spatial structure of a hybrid zone between the ground beetles Carabus maiyasanus and C. iwawakianus using GIS‐based quantification of environmental factors and a statistical comparison of species distribution models (SDMs). We determined that both of the hypothetical processes can be important in the hybrid zone. We detected interspecific differences in the environmental factors in presence localities and their relative contribution in SDMs. SDMs were not identical between species even within contact areas, but tended to be similar within the range of each species. These results suggest an association between environments and species, and provide evidence that ecological differentiation between species plays a role in the maintenance of the hybrid zone. Contact areas were characterized by a relatively high temperature, low precipitation, and high topological wetness. Thus, the contact areas were regarded as being located in an unsuitable habitat with a drier climate, where those populations are likely to occur in patches with limited precipitation concentrated. A comparison of spatial scales suggests that exogenous selection via environmental factors may be weaker than endogenous selection via genitalic incompatibility.

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Dispersal differences predict population genetic structure in Mormon crickets

Cited by 25 publications

References 62 publications

Fine-scale spatial genetic structure and within population male-biased gene-flow in the grasshopper Mioscirtus wagneri

Fine-scale spatial genetic structure and within population male-biased gene-flow in the grasshopper Mioscirtus wagneri

Population structures of three Calliptamus spp. (Orthoptera: Acrididae) across the Western Mediterranean Basin

Ecological differentiation and habitat unsuitability maintaining a ground beetle hybrid zone

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