The role of host plant species in the phenotypic differentiation of sympatric populations of <i>Aleiodes nolophanae</i> and <i>Cotesia marginiventris</i>

Medina, Raúl F.; Barbosa, Pedro

doi:10.1111/j.1570-7458.2008.00736.x

Cited by 6 publications

(4 citation statements)

References 89 publications

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“…For example, in another study on Solidago , Cronin & Abrahamson (2001) were unable to detect diversification of the parasitoid Eurytoma gigantea in response to host race formation in Eurosta gall flies. Similarly, a study of parasitoids of green cloverworm on alfalfa and soybean failed to detect reproductive isolation using AFLPs (Medina, 2005). We are unaware of any previous studies testing specifically for sequential host associated differentiation in the Aphidiinae.…”

Section: Discussionmentioning

confidence: 99%

Molecular markers reveal strong geographic, but not host associated, genetic differentiation inAphidius transcaspicus, a parasitoid of the aphid genusHyalopterus

Lozier

Roderick

Mills

2008

Bull. Entomol. Res.

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Host plant associated genetic differentiation is a common phenomenon in phytophagous insects, but the degree to which such associations sequentially drive diversification at higher trophic levels is not as well understood. A recent study examining neutral molecular markers in Hyalopterus aphids revealed that genetic structure in this genus is strongly determined by primary host plant use (Prunus spp.). In this paper, we take a similar approach to determine whether this host plant specificity has affected genetic structure in the parasitoid Aphidius transcaspicus, an important natural enemy of Hyalopterus spp. in the Mediterranean. Mitochondrial DNA (428 bp) and seven microsatellite loci were examined in parasitoids collected from aphid populations on almond, apricot, peach and plum trees from Spain and Greece. In contrast to the previous findings for Hyalopterus from the same regions, here we find no evidence for host associated diversification in A. transcaspicus at the species level or below, though geographic structure between regional populations is exceptionally high. These findings have several implications for our understanding of the ecology and evolution of A. transcaspicus as well as for its use as a biological control agent for Hyalopterus, suggesting that a consideration of host plant specificity may be less critical than factors such as climatic suitability or geographic origins of invasive populations.

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Section: Discussionmentioning

confidence: 99%

Molecular markers reveal strong geographic, but not host associated, genetic differentiation inAphidius transcaspicus, a parasitoid of the aphid genusHyalopterus

Lozier

Roderick

Mills

2008

Bull. Entomol. Res.

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“…The generalist O. pityocampae has a more flexible host selection, it can adapt its development to hosts of different origins and size (Ruschioni et al 2015), while the specialist B. servadeii is more dependent on the quality of the host plant (Battisti 1989). Thus, the differences in the quality of host plant available for oviposition may influence the performance of parasitoids (Medina & Barbosa 2008).…”

Section: Introductionmentioning

confidence: 99%

Plant phenotype affects oviposition behaviour of pine processionary moth and egg survival at the southern edge of its range

Hezil¹,

Chakali²,

Battisti³

2018

iForest

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Morphological traits of Aleppo pine (Pinus halepensis) needles in native and planted stands at the southern edge of its range influence oviposition behaviour of the pine processionary moth (Thaumetopoea pityocampa). Extreme environmental conditions result in a reduction in needle size of the host plant which corresponds to a lower rate of fecundity in the moth. Our results showed that egg batches were laid closer to the needle buds, especially on native trees with short needles, and this resulted in increased egg mortality. Number of eggs laid by the female moths did not vary between native and planted stands, nor did the number of parasitized eggs of the two common Hymenopteran parasitoids, Baryscapus servadeii and Ooencyrtus pityocampae. The observed differences in egg mortality are likely due to abiotic factors associated with the position of the egg batch on the needles. Thaumetopoea pityocampa eggs require a thermal niche for optimal development, and further measurements are required to determine the thermal threshold of these eggs. Understanding the role of climate in T. pityocampa populations will be an important factor for the survival of the Aleppo pine forests and protecting it from desertification.

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“…Host plants may indirectly affect the survival and fitness of parasitoids (Price et al, 1980;Vinson, 1999;Hunter, 2003). Differences in herbivore hosts' nutritional quality when feeding on different host plant species might produce phenotypic differences in fitness-related parasitoid traits, such as adult mass, adult longevity, fecundity, and developmental time (Sznajder & Harvey, 2003;Medina & Barbosa, 2008). Thus, in theory, it is possible that HAD in parasitoids could also be found even if it is not present in their herbivore hosts.…”

Section: Introductionmentioning

confidence: 99%

Testing for host‐associated differentiation in two egg parasitoids of a forest herbivore

Simonato

Battisti

Zovi

et al. 2012

Entomologia Exp Applicata

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Several studies underline the importance of ecological barriers and differential selection in driving sympatric speciation. Host‐associated differentiation (HAD) has been proposed as one of the mechanisms leading to sympatric speciation. However, it is still unclear how common HAD is or which are the factors that could promote it. In particular, not much is known about HAD in predators and parasitoids of herbivorous insects. One of the characteristics postulated to pre‐dispose insects to HAD is parthenogenesis as it may favour adaptive responses to particular environments, amplifying selected gene complexes. In this study, we used amplified fragment length polymorphism (AFLP) markers to determine whether HAD is present in two parthenogenetic egg parasitoids attacking the same herbivore species – the pine processionary moth, Thaumetopoea pityocampa (Denis & Schiffermüller) (Lepidoptera: Notodontidae) – on two host Pinus species. A total of 100 loci for 59 individuals sampled in four populations of Baryscapus servadeii (Domenichini) (Hymenoptera: Eulophidae), a specialist parasitoid, and 106 loci for 117 individuals sampled in six populations of Ooencyrtus pityocampae Mercet (Hymenoptera: Encyrtidae), a generalist parasitoid, were analysed. Levels of genetic differentiation were also assessed with an outlier analysis, checking for alleles associated to host plants. No evidence of HAD was detected in any of the two parasitoid species. We hypothesize that both the lack of strict parthenogenetic reproduction and the ectophagous nature of the insect host could explain the absence of HAD. The genetic variation observed in the generalist parasitoid responded to a pattern of local adaptation, whereas no relationship with either host or geography was found in the specialist parasitoid.

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The role of host plant species in the phenotypic differentiation of sympatric populations of Aleiodes nolophanae and Cotesia marginiventris

Cited by 6 publications

References 89 publications

Molecular markers reveal strong geographic, but not host associated, genetic differentiation inAphidius transcaspicus, a parasitoid of the aphid genusHyalopterus

Molecular markers reveal strong geographic, but not host associated, genetic differentiation inAphidius transcaspicus, a parasitoid of the aphid genusHyalopterus

Plant phenotype affects oviposition behaviour of pine processionary moth and egg survival at the southern edge of its range

Testing for host‐associated differentiation in two egg parasitoids of a forest herbivore

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