Cryptic Speciation and Host-Race Formation in a Purportedly Generalist Tumbling Flower Beetle

Blair, Catherine P.; Abrahamson, Warren G.; Jackman, John A.; Tyrrell, Lynn

doi:10.1111/j.0014-3820.2005.tb00991.x

Cited by 85 publications

(53 citation statements)

References 74 publications

(77 reference statements)

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“…Host-adapted races and biotypes have been characterized within numerous species parasitizing host-plants with long vegetative cycles (Edmunds and Alstad 1978;Rausher 1983;Thompson 1994;Jerome and Ford 2002;Blair et al 2005).…”

Section: Discussionmentioning

confidence: 99%

Comparative population structure of Chinese sumac aphid Schlechtendalia chinensis and its primary host-plant Rhus chinensis

Ren

Zhu

Wang³

et al. 2007

Genetica

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Most of our current understanding of comparative population structure has been come from studies of parasite-host systems, whereas the genetic comparison of gallnut-aphids and their host-plants remain poorly documented. Here, we examined the population genetic structure of the Chinese sumac aphid Schlechtendalia chinensis and its unique primary host-plant Rhus chinensis in a mountainous province in western China using inter-simple sequence repeat (ISSR) markers. Despite being sampled from a mountainous geographic range, analysis of molecular variance (AMOVA) showed that the majority of genetic variation occurred among individuals within populations of both the aphid and its host. The aphid populations were found to be structured similarly to their primary host populations (F (ST) values were 0.239 for the aphid and 0.209 for its host), suggesting that there are similar patterns of gene flow between the populations of the aphid and between populations of its host-plant. The genetic distances (F (ST)/1 - F (ST)) between the aphid populations and between its host-plant populations were uncorrelated, indicating that sites with genetically similar host-plant populations may not always have genetically similar aphid populations. The lack of relationships between genetic and geographical distance matrices suggested that isolation by distance (IBD) played a negligible role at this level. This may be mainly attributed to the founder effect, genetic drift and the relative small spatial scale between populations.

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Section: Discussionmentioning

confidence: 99%

Comparative population structure of Chinese sumac aphid Schlechtendalia chinensis and its primary host-plant Rhus chinensis

Ren

Zhu

Wang³

et al. 2007

Genetica

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“…Gould 1979;Fry 1999;Gotoh et al 1993;Agrawal 2000;Egas et al 2003) and phytophagous insects (e.g. Via 1999;Dres and Mallet 2002;Ikonen et al 2003;Blair et al 2005;Forister 2005). This process is thought to be linked to disruptive selection exerted by different hosts and host-dependent trade-offs (Maynard Smith 1966).…”

Section: Discussionmentioning

confidence: 99%

Is the Cereal Rust Mite, Abacarus Hystrix Really a Generalist? – Testing Colonization Performance on Novel Hosts

Skoracka

Kuczyński

2006

Exp Appl Acarol

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The majority of eriophyoid mites are highly host specific and restricted to a narrow range of acceptable host plant species. The cereal rust mite, Abacarus hystrix was considered to be one of a few exceptions among them and has been found to be using a relatively wide host range. Since this species is a vagrant, inhabiting short-lived plants and aerially dispersing, it has commonly been considered to be a host generalist. Here the opposite hypothesis is tested, that host populations of A. hystrix are specialized on their local host plants and may represent host races. For this purpose, females from two host populations (quack grass, Agropyron repens and ryegrass, Lolium perenne) were transferred, and subsequently reared, on their normal (grass species from which females came from) and novel (other grass species) hosts. The female's fitness was assessed by survival and fecundity on the normal and novel host. Females of both populations had no success in the colonization of the novel host. They survived significantly better and had significantly higher fecundity on their normal host than on the novel one. These findings correspond with observations on host-dependent phenotype variability and host acceptance. The presence of locally specialized host populations in A. hystrix may be evidence for high host specificity among eriophyoids and the viruses they transmit. The main conclusion is that A. hystrix, which so far has been considered as a host generalist, in fact may be a complex species consisting of highly specialized host races.

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“…Cryptic speciation also has been found to be associated with host specialization in herbivorous insects (Hebert et al 2004, Scheffer et al 2004, Blair et al 2005, Stireman et al 2005, Abrahamson and Blair 2008, Thompson 2008. The scale of discovery of new cryptic species in these and other studies has been so great that estimates of global species diversity are having to be increased.…”

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confidence: 98%

Cryptic Species of Parasitoids Attacking the Soybean Aphid (Hemiptera: Aphididae) in Asia: Binodoxys communis and Binodoxys koreanus (Hymenoptera: Braconidae: Aphidiinae)

Desneux

Starý

Delebecque

et al. 2009

Annals of the Entomological Society of America

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Collections of parasitoids attacking the soybean aphid, Aphis glycines Matsumura (Hemiptera: Aphididae), in South Korea yielded specimens that were originally identified as Binodoxys communis (Gahan) (Hymenoptera: Braconidae). We report here on laboratory studies indicating that this population is actually a previously unknown species of Binodoxys. Four classes of comparisons were made between the Korean population and a Chinese population that also had been identified as B. communis. The comparisons included 1) mating trials coupled with behavioral observations and spermathecal examinations, 2) assessment of nucleotide divergence at two mitochondrial and two nuclear gene loci, 3) patterns of host use, and 4) reassessment of morphological characters. These studies revealed premating reproductive isolation of the two populations and minor nucleotide differences in mitochondrial cytochrome oxidase I sequences and nuclear internal transcriber spacer 1 sequences, providing strong indications that they are different species. Subtle morphological differences also were discovered that confirmed that the Chinese population corresponds to B. communis, whereas the Korean population does not. We propose the name Binodoxys koreanus StarÝ, sp. n. for the Korean population. The two species exhibited similar host ranges in the laboratory, the most notable exception being that B. koreanus, sp. n. is better able to develop in a population of Aphis craccivora Koch that harbors the bacterial endosymbiont Hamiltonella defensa Moran, which seems to strongly interfere with the development of B. communis. We discuss the implications of our results for biological control introductions against the soybean aphid in North America.

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Cryptic Speciation and Host-Race Formation in a Purportedly Generalist Tumbling Flower Beetle

Cited by 85 publications

References 74 publications

Comparative population structure of Chinese sumac aphid Schlechtendalia chinensis and its primary host-plant Rhus chinensis

Comparative population structure of Chinese sumac aphid Schlechtendalia chinensis and its primary host-plant Rhus chinensis

Is the Cereal Rust Mite, Abacarus Hystrix Really a Generalist? – Testing Colonization Performance on Novel Hosts

Cryptic Species of Parasitoids Attacking the Soybean Aphid (Hemiptera: Aphididae) in Asia: Binodoxys communis and Binodoxys koreanus (Hymenoptera: Braconidae: Aphidiinae)

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