Behavioural, ecological and genetic evidence confirm the occurrence of host‐associated differentiation in goldenrod gall‐midges

Dorchin, Netta; Scott, Eric R.; Clarkin, Carolyn E.; Luongo, M. P.; Jordan, Steve; Abrahamson, Warren G.

doi:10.1111/j.1420-9101.2009.01696.x

Cited by 45 publications

(40 citation statements)

References 69 publications

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“…Mitochondrial host-associated Φ ST for New Guinea Lepidoptera, where significant (Table S2; x ± SD = 0.223 ± 0.113, n = 15), was somewhat lower than that for other sympatric host races, including gall midges (Φ ST = 0.789) (17), apple maggot flies (Φ ST = 0.866) (18), and golden rod gall makers (Φ ST = 0.504 ± 0.370, n = 3) (10). Thus, it seems unlikely that the extent of host-associated differentiation is sufficient for recognition of numerous cryptic species that would alter estimates of host specificity for the New Guinea caterpillar community as whole.…”

Section: Discussionmentioning

confidence: 91%

Population genetics of ecological communities with DNA barcodes: An example from New Guinea Lepidoptera

Craft¹,

Pauls

Darrow

et al. 2010

Proc. Natl. Acad. Sci. U.S.A.

105

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Comparative population genetics of ecological guilds can reveal generalities in patterns of differentiation bearing on hypotheses regarding the origin and maintenance of community diversity. Contradictory estimates of host specificity and beta diversity in tropical Lepidoptera (moths and butterflies) from New Guinea and the Americas have sparked debate on the role of host-associated divergence and geographic isolation in explaining latitudinal diversity gradients. We sampled haplotypes of mitochondrial cytochrome c oxidase I from 28 Lepidoptera species and 1,359 individuals across four host plant genera and eight sites in New Guinea to estimate population divergence in relation to host specificity and geography. Analyses of molecular variance and haplotype networks indicate varying patterns of genetic structure among ecologically similar sympatric species. One-quarter lacked evidence of isolation by distance or host-associated differentiation, whereas 21% exhibited both. Fourteen percent of the species exhibited host-associated differentiation without geographic isolation, 18% showed the opposite, and 21% were equivocal, insofar as analyses of molecular variance and haplotype networks yielded incongruent patterns. Variation in dietary breadth among community members suggests that speciation by specialization is an important, but not universal, mechanism for diversification of tropical Lepidoptera. Geographically widespread haplotypes challenge predictions of vicariance biogeography. Dispersal is important, and Lepidoptera communities appear to be highly dynamic according to the various phylogeographic histories of component species. Population genetic comparisons among herbivores of major tropical and temperate regions are needed to test predictions of ecological theory and evaluate global patterns of biodiversity. community ecology | DNA barcoding | phylogeography | plant-insect interactions | speciation

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Section: Discussionmentioning

confidence: 91%

Population genetics of ecological communities with DNA barcodes: An example from New Guinea Lepidoptera

Craft¹,

Pauls

Darrow

et al. 2010

Proc. Natl. Acad. Sci. U.S.A.

105

View full text Add to dashboard Cite

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“…The two species described here were used as outgroups in a previous phylogenetic study (Dorchin et al 2009), for which a 650 bp fragment of the mitochondrial COI gene was sequenced. The relevant methods are described in Dorchin et al (2009).…”

Section: Methodsmentioning

confidence: 99%

“…The relevant methods are described in Dorchin et al (2009). Sequences were deposited under GenBank accession numbers EU375687 and EU375694.…”

Section: Methodsmentioning

confidence: 99%

Two new Dasineura species (Diptera: Cecidomyiidae) from coastal tea tree, Leptospermum laevigatum (Myrtaceae) in Australia

Dorchin

Adair²

2011

Australian Journal of Entomology

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Two new species of gall midges, Dasineura strobila Dorchin n.sp. and D. tomentosa Dorchin n.sp., are described from galls in vegetative and reproductive buds of coastal tea tree, Leptospermum laevigatum from Australia and South Africa. Galls cause abortion of buds and, when induced in reproductive tissues, prevent fruit set and seed formation. Despite their assumed relatedness, the two species exhibit clear morphological differences in larvae, pupae and adults of both sexes as well as in the morphology of their galls. These are the first Dasineura species to be described from plants of the Myrtaceae outside the Neotropical and Nearctic regions and the first ones recorded from the chiefly Australian subfamily Leptospermoideae. Given the effect of galls on growth and reproduction of the plant, the gall midges are considered as possible biological control agents of coastal tea tree in areas of Australia and South Africa where the plant is an invasive weed.

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“…Incongruence between mtDNA and nDNA data is regularly found in genetic analyses of parasitoids and is often associated with incongruence between species identification and host use (Smith et al, 2006(Smith et al, , 2007; see also Dorchin et al, 2009 for an example of phytophagous insects and host plant use). Most often the incongruence is attributed to hybridization of two species or races, which results in the offspring parasitizing both the hosts associated with the father and/or those associated with the mother (Smith et al, 2007).…”

Section: Molecular Analysesmentioning

confidence: 99%

“…It will, however, be difficult to decide the boundaries between species when there is no information on reproductive isolation. In order to determine whether they are a heterogeneous species, races or sister species ideally one needs to estimate the amount of gene flow occurring between groups (Dorchin et al, 2009;Forbes et al, 2009).…”

Section: Molecular Analysesmentioning

confidence: 99%

The parasitoid species complex associated with sexual and parthenogenetic Naryciinae (Lepidoptera: Psychidae): Integrating ecological and molecular analyses

Elzinga¹,

Zwakhals²,

Mappes³

et al. 2011

Eur. J. Entomol.

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Abstract. This study describes the parasitoid species complex associated with seven closely related species of sexual (Siederia rupicollella, S. listerella, Dahlica lazuri, D. charlottae and D. lichenella) and parthenogenetic (Dahlica fennicella and D. triquetrella) Naryciinae (Lepidoptera: Psychidae) in Central Finland. A thorough ecological analysis of all the species of parasitoids recorded was combined with analyses of molecular data. Mitochondrial and nuclear DNA data were obtained from all the species in order to (1) detect cryptic species associated with host specialization, (2) assign undescribed males to females, and (3) verify the morphological identification of closely related species. A DNA barcoding technique was employed to identify host species from parasitized larval remains. By sampling more than 10,000 host larvae, of which 25.7% were parasitized, nine parasitoid species were identified morphologically, including both koinobionts (Ichneumonidae: Diadegma incompletum, Macrus parvulus, Trachyarus borealis, T. solyanikovi, T. fuscipes, T. brevipennis and Braconidae: Meteorus affinis) and idiobionts (Ichneumonidae: Orthizema flavicorne, Gelis fuscicornis).Ecological characteristics such as time and mode of host attack, time of emergence and level of specialization differed widely. The results show that differences in parasitoid biology need to be taken into account when studying differences in percentage parasitism of sexual and parthenogenetic Naryciinae. The molecular data revealed that one parasitoid species M. parvulus may consist of two cryptic forms associated with the sexual and parthenogenetic hosts, respectively. The data further establishes that T. brevipennis and some T. fuscipes are in fact morphotypes of one species. The large variation in mitochondrial DNA within species and its inconsistency with nuclear DNA demonstrate that current species and genus delimitation is inadequate in the Trachyarus species group. Our study shows that it is essential to use DNA barcoding methods when investigating host-parasitoid complexes.

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Behavioural, ecological and genetic evidence confirm the occurrence of host‐associated differentiation in goldenrod gall‐midges

Cited by 45 publications

References 69 publications

Population genetics of ecological communities with DNA barcodes: An example from New Guinea Lepidoptera

Population genetics of ecological communities with DNA barcodes: An example from New Guinea Lepidoptera

Two new Dasineura species (Diptera: Cecidomyiidae) from coastal tea tree, Leptospermum laevigatum (Myrtaceae) in Australia

The parasitoid species complex associated with sexual and parthenogenetic Naryciinae (Lepidoptera: Psychidae): Integrating ecological and molecular analyses

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