Genetically Based Polymorphisms in Morphology and Life History Associated With Putative Host Races of the Water Lily Leaf Beetle, Galerucella Nymphaeae

Pappers, Stephanie M.; Velde, G. van der; Ouborg, N. Joop; Groenendael, J.M. van

doi:10.1554/0014-3820(2002)056[1610:gbpima]2.0.co;2

Cited by 9 publications

(14 citation statements)

References 34 publications

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“…A complementary experiment would be to carry out a fully reciprocal crossing scheme with different combinations of tick parents. If body size and shape have a heritable component, offspring morphology should be influenced by cross type (for an example see Pappers et al ., ). Unfortunately, these approaches are not yet feasible for I. uriae as this species is difficult to rear under laboratory conditions because of its high specificity for seabirds.…”

Section: Discussionmentioning

confidence: 97%

“…Variables related to feeding (mouth appendices), locomotion, and reproduction (legs and position of the genital pore) were also measured, as such variables have been shown to be under strong selection among host races of phytophagous insects (e.g. Pappers et al ., ; Diegisser et al ., ). In a few cases, it was not possible to measure certain variables because of tick malformations or problems with tick preservation.…”

Section: Methodsmentioning

confidence: 99%

“…Direct evidence for an association between morphological variation and the diversification process is provided by a number of studies on phytophagous insects (e.g. Schmidt, Walter & Moore, ; Pappers et al ., ; Svensson, Althoff & Pellmyr, ), but remains scarce among other groups of parasites (e.g. Huyse & Volckaert, ; Klimov, Bochkov & OConnor, ; Malenke, Johnson & Clayton, ).…”

Section: Introductionmentioning

confidence: 99%

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Body size and shape evolution in host races of the tickIxodes uriae

Dietrich

Béati

Elguero

et al. 2012

Biol J Linn Soc Lond

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The tick Ixodes uriae is a common ectoparasite of seabirds, and is widely distributed across the circumpolar regions of both hemispheres. Previous work demonstrated the existence of genetically distinct host races of this ectoparasite, occurring across its current range. The objective of the present study was to examine whether these host races have evolved measurable morphological differences. We measured a set of morphological variables on 255 non-engorged ticks (nymphs and adults) collected from three sympatrically occurring host species in the North Atlantic. Genotyping at eight microsatellite markers enabled us to analyse the relationship between patterns of morphological and neutral genetic variation. Multivariate analyses showed that most morphological variation was associated with size differences among tick individuals. Body size differed among races, but only in adult life stages. A linear discriminant analysis based on shape variation revealed three distinct morphological clusters corresponding to the three tick host races. These results, along with correlated patterns of host-related genetic variation, suggest that differences among host-related groups are not simply the result of phenotypic plasticity or drift, but rather reflect host-associated adaptations. Experimental work and observations across the range of I. uriae will now be required to test the genetic basis and adaptive nature of morphological differences.

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Section: Discussionmentioning

confidence: 97%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Body size and shape evolution in host races of the tickIxodes uriae

Dietrich

Béati

Elguero

et al. 2012

Biol J Linn Soc Lond

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“…Ecological divergence has been observed in various cases of incipient speciation, especially in phytophagous insects (Katakura et al 1989; Feder et al 1994, 1997; Funk 1998; Via 1999; Via et al 2000; Nosil 2007; Oshima 2008). In phytophagous insects, reproductive isolation can be attained mainly by differences in host plant choice (i.e., host fidelity) (Katakura et al 1989), because habitat isolation caused by choices of different hosts by phytophagous specialists is tightly linked with the choice of mating and oviposition sites (Katakura et al 1989; Craig et al 1993, 1997; Feder et al 1998; Via 1999; Via et al 2000; Pappers et al 2002a,b; Malausa et al 2005). Although host fidelity potentially contributes enormously to reducing gene exchange, only a few studies have measured it in wild populations (e.g., Feder et al 1994).…”

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confidence: 99%

Contribution of Multiple Isolating Barriers to Reproductive Isolation Between a Pair of Phytophagous Ladybird Beetles

Matsubayashi

Katakura

2009

Evolution

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Reproductive isolation between species may often be attained by multiple isolating barriers, but the components are rarely Reproductive isolation between species is often effected by various factors that function in preventing gene exchange (Dobzhansky 1937;Mayr 1947Mayr , 1963Coyne 1992;Schluter 2001;Price and Bouvier 2002; Coyne and Orr 2004). Only by quantifying reproductive isolation we can compare the strength of individual isolating barriers acting during respective life stages. Data on various isolating barriers have been collected for several species pairs of plants (Morrison et al.

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“…), we conclude that the ecological divergence of these species is sufficient to maintain the species boundaries, including neutral genomic regions. This maintenance is critical evidence for the large contribution that divergence adaptation to different host plants makes to incipient speciation, as has been demonstrated in other well‐known examples of phytophagous insects (Bush, ; Via ; Pappers et al ., ; Matsubayashi and Katakura ; Peccoud et al ., ; Matsubayashi et al . ).…”

Section: Discussionmentioning

confidence: 99%

Genetic divergence with ongoing gene flow is maintained by the use of different hosts in phytophagous ladybird beetles genus Henosepilachna

Matsubayashi

Kohyama

Kobayashi

et al. 2017

J of Evolutionary Biology

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Adaptation to different environments can promote population divergence via natural selection even in the presence of gene flow - a phenomenon that typically occurs during ecological speciation. To elucidate how natural selection promotes and maintains population divergence during speciation, we investigated the population genetic structure, degree of gene flow and heterogeneous genomic divergence in three closely related Japanese phytophagous ladybird beetles: Henosepilachna pustulosa, H. niponica and H. yasutomii. These species act as a generalist, a wild thistle (Cirsium spp.) specialist and a blue cohosh (Caulophyllum robustum) specialist, respectively, and their ranges differ accordingly. The two specialist species widely co-occur but are reproductively isolated solely due to their high specialization to a particular host plant. Genomewide amplified fragment-length polymorphism (AFLP) markers and mitochondrial cytochrome c oxidase subunit I (COI) gene sequences demonstrated obvious genomewide divergence associated with both geographic distance and ecological divergence. However, a hybridization assessment for both AFLP loci and the mitochondrial sequences revealed a certain degree of unidirectional gene flow between the two sympatric specialist species. Principal coordinates analysis (PCoA) based on all of the variable AFLP loci demonstrated that there are genetic similarities between populations from adjacent localities irrespective of the species (i.e. host range). However, a further comparative genome scan identified a few fractions of loci representing approximately 1% of all loci as different host-associated outliers. These results suggest that these three species had a complex origin, which could be obscured by current gene flow, and that ecological divergence can be maintained with only a small fraction of the genome is related to different host use even when there is a certain degree of gene flow between sympatric species pairs.

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Genetically Based Polymorphisms in Morphology and Life History Associated With Putative Host Races of the Water Lily Leaf Beetle, Galerucella Nymphaeae

Cited by 9 publications

References 34 publications

Body size and shape evolution in host races of the tickIxodes uriae

Body size and shape evolution in host races of the tickIxodes uriae

Contribution of Multiple Isolating Barriers to Reproductive Isolation Between a Pair of Phytophagous Ladybird Beetles

Genetic divergence with ongoing gene flow is maintained by the use of different hosts in phytophagous ladybird beetles genus Henosepilachna

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