Genotypic interactions in an aphid-host plant relationship: Uroleucon rudbeckiae and Rudbeckia laciniata

Service, Philip M.

doi:10.1007/bf00396772

Cited by 83 publications

(59 citation statements)

References 21 publications

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“…It has also been demonstrated that within-species genetic variation is important for directly interacting species (Service 1984, Mopper 1996, and the effect can be mediated by the presence or absence of a third species in the community (Tetard-Jones et al 2007). Thus, there is clear evidence showing that genetic variation within a species will affect directly interacting species; however, we do not know to what extent genetic variation, and genotypic interactions, within intermediate species will affect the outcome of indirect interactions.…”

Section: Introductionmentioning

confidence: 97%

Community genetic interactions mediate indirect ecological effects between a parasitoid wasp and rhizobacteria

Zytynska

Fleming

Tétard‐Jones

et al. 2010

Ecology

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Abstract. Indirect ecological effects (IEEs) clearly influence species dynamics and abundance, yet relatively little is known about how they influence the evolution of species involved. While genetic variation in the species causing and responding to the IEE has obvious effects, the influence of genetic variation in intermediate species remains unexamined. Given the often counterintuitive responses of populations to IEEs this seems a significant omission. Following a community genetics approach, we used a model tetra-trophic system (parasitoid wasp, aphid, barley, and rhizobacteria) to investigate the effect of genetic interactions within the two linking species (aphids and barley) on the IEE of rhizobacteria on wasps. We show that 12.4% of the variation in wasp size, a proxy for fitness, is explained by higher-order interactions between aphid genotype (A), barley genotype (B), and presence or absence of rhizobacteria (R) (Genotype [B] 3 Genotype [A] 3 Environment [R] ). Thus, the IEE of rhizobacteria on the parasitoid wasp is influenced by the specific combination of aphid and barley genotypes that mediate the interactions. In some cases changes in the genotypes of the intermediate species completely reverse the effect of rhizobacteria on wasp size. Our work demonstrates that within-species genetic variation is important in shaping IEEs in communities, an essential component of community evolutionary processes.

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Section: Introductionmentioning

confidence: 97%

Community genetic interactions mediate indirect ecological effects between a parasitoid wasp and rhizobacteria

Zytynska

Fleming

Tétard‐Jones

et al. 2010

Ecology

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“…Factors 2-4 are also major assumptions of local mate competition models. Several studies have demonstrated that plant genotypes vary in their suitability for insect growth and reproduction (e.g., Marquis, 1984;Moran, 1981;Service, I984a). Environmental variation also affects plant phenotype in ways that influence insect fitness (Rausher, 1981;Service, 1984b).…”

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confidence: 99%

Genetic Determination of Plant Susceptibility to an Herbivorous Insect Depends on Environmental Context

Maddox

Cappuccino

1986

Evolution

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“…Previous work has demonstrated that genetically based interactions between species can influence the phenotypes of both the directly and indirectly interacting individuals (Service 1984;Carius et al 2001;Tétard-Jones et al 2007;Zytynska et al 2010). For example, the indirect effect of a soil rhizobacteria on the body-size (fitness) of a parasitoid wasp was mediated by genotypic interactions between the linking barley and aphid species (Zytynska et al 2010).…”

Section: Discussionmentioning

confidence: 98%

“…Genetic interactions between different species also occur, which can influence the fitness of the species involved. For example, genotypic interactions between an aphid (Uroleucon rudbeckiae) and its herbaceous perennial host plant (Rudbeckia laciniata) influenced aphid reproductive rate (Service 1984). Such interactions have also been shown to occur in hostparasite systems (e.g.…”

Section: Introductionmentioning

confidence: 98%

Genetic interactions influence host preference and performance in a plant-insect system

Zytynska

Preziosi

2011

Evol Ecol

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Phytophagous insects generally feed on a restricted range of host plants, using a number of different sensory and behavioural mechanisms to locate and recognize their host plants. Phloem-feeding aphids have been shown to exhibit genetic variation for host preference of different plant species and genetic variation within a plant species can also have an effect on aphid preference and acceptance. It is known that genotypic interactions between barley genotypes and Sitobion avenae aphid genotypes influence aphid fitness, but it is unknown if these different aphid genotypes exhibit active host choice (preference) for the different barley genotypes. Active host choice by aphid genotypes for particular plant genotypes would lead to assortative association (non-random association) between the different aphid and plant genotypes. The performance of each aphid genotype on the plant genotypes also has the ability to enhance these interactions, especially if the aphid genotypes choose the plant genotype that also infers the greatest fitness. In this study, we demonstrate that different aphid genotypes exhibit differential preference and performance for different barley genotypes. Three out of four aphid genotypes exhibited preference for (or against) particular barley genotypes that were not concordant with differences in their reproductive rate on the specific barley genotype. This suggests active host choice of aphids is the primary mechanism for the observed pattern of non-random associations between aphid and barley genotypes. In a community context, such genetic associations between the aphids and barley can lead to population-level changes within the aphid species. These interactions may also have evolutionary effects on the surrounding interacting community, especially in ecosystems of limited species and genetic diversity.

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Genotypic interactions in an aphid-host plant relationship: Uroleucon rudbeckiae and Rudbeckia laciniata

Cited by 83 publications

References 21 publications

Community genetic interactions mediate indirect ecological effects between a parasitoid wasp and rhizobacteria

Community genetic interactions mediate indirect ecological effects between a parasitoid wasp and rhizobacteria

Genetic Determination of Plant Susceptibility to an Herbivorous Insect Depends on Environmental Context

Genetic interactions influence host preference and performance in a plant-insect system

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