Does sex‐biased dispersal account for the lack of geographic and host‐associated differentiation in introduced populations of an aphid parasitoid?

Zepeda-Paulo, Francisca; Lavandero, Blas; Maheo, Frédérique; Dion, Emilie; Outreman, Yannick; Simon, Jean‐Christophe; Figueroa, Christian C.

doi:10.1002/ece3.1504

Cited by 16 publications

(10 citation statements)

References 72 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The diversity of the studied populations, after CL2 and CL5, followed an expected pattern of decreasing diversity, according to the length of time in rearing and bottlenecks suffered during the transfer of individuals when initiating new laboratory colonies: the field-collected KZ2, its descendants CL3, a mixed of laboratory populations CL4, and finally the three populations that have the longest rearing history USA, NZ and FR. The estimated diversity of the field population in Kazakhstan was lower than the diversity estimated for other parasitoids, such as N. melanocephalus and A. ervi (Anton et al, 2007, Zepeda-Paulo et al, 2015. This could be because our collection was made in a small isolated patch of an old abandoned apple orchard, which still remains in the outskirts of Almaty, a city that has grown rapidly in the last ten years.…”

Section: Discussionmentioning

confidence: 79%

“…Allelic richness of these populations was on average 2.2 alleles/marker and heterozygosity (He) was 35%. Other studies with parasitoids have shown a higher average allelic richness and heterozygosity: 4.5 alleles/marker and 38% heterozygotes for Neotypus melanocephalus Gmelin (Hymenoptera: Ichneumonidae) (Anton et al, 2007), and 5.2 alleles/marker and 63% heterozygotes for Aphidius ervi (Haliday) (Hymenoptera: Braconidae) (Zepeda-Paulo et al, 2015). The highest estimated diversity was from the laboratory mixed population CL2, which was formed by crossing insects collected in two different regions in the area of origin.…”

Section: Discussionmentioning

confidence: 90%

See 1 more Smart Citation

Genetic analyses and occurrence of diploid males in field and laboratory populations of Mastrus ridens (Hymenoptera: Ichneumonidae), a parasitoid of the codling moth

et al. 2016

View full text Add to dashboard Cite

The parasitoid wasp Mastrus ridens (Hymenoptera: Ichneumonidae) is a particularly well-suited biological model to document the history and evolution of populations used in classical biological control, repeatedly moved from laboratory to laboratory worldwide and introduced in various environments. This specialist ectoparasitoid of the codling moth was first imported from Kazakhstan to the USA in the 1990's, and then sent to Argentina, Chile and New Zealand. More recently, it was sent to Australia and France from other laboratory colonies, and imported again from field collections in Kazakhstan to Chile. Here, we used DNA sequencing to confirm the taxonomic identity of several populations used for biological control worldwide, and developed microsatellite markers for population genetics studies. A multiplex PCR amplifying 11 polymorphic markers was designed. These markers were used to compare the genetic diversity of laboratory and field populations and evaluate genetic differentiation between them. Results showed that laboratory populations with the longest rearing history had lower genetic diversity. Moreover, the genotyping of males with the markers revealed the occurrence of diploid males, which was further confirmed by flow cytometry, suggesting complementary sex determination (CSD) in this species. The percentage of diploid males in the populations ranged from 4% to 25% and were negatively correlated with diversity indices, which is consistent with a single-locus CSD and genetic bottlenecks in laboratory rearings. Molecular tools proved to be suitable and reliable for genetic diversity analyses in M. ridens, and should be implemented more frequently in classical biological control programs.

show abstract

Section: Discussionmentioning

confidence: 79%

Section: Discussionmentioning

confidence: 90%

Genetic analyses and occurrence of diploid males in field and laboratory populations of Mastrus ridens (Hymenoptera: Ichneumonidae), a parasitoid of the codling moth

et al. 2016

View full text Add to dashboard Cite

show abstract

“…Behavioral experiments using the same laboratory populations from which the individuals of our transcriptome experiment were taken, showed that A. ervi collected from different aphid species ( A. pisum and S. avenae ) and host-races of the pea aphids (pea versus alfalfa) differed in several infectivity traits (host preference) but not in virulence (fitness) ( Zepeda-Paulo et al, 2013 ). This is despite the lack of any detectable genetic structuring in Chilean A. ervi natural populations collected from different aphid hosts species in the field ( Daza-Bustamante et al, 2002 ; Zepeda-Paulo et al, 2015 ). The absence of genetic differentiation is explained by the very recent (1970ies) and single introduction event of A. ervi as a biological control agent for aphid pests in Chile ( Zepeda-Paulo et al, 2016 ; Zúñiga et al, 1986 ).…”

Section: Discussionmentioning

confidence: 94%

“…These results suggest that the preference for the natal host (i.e., host fidelity) is not under direct selection and those parasitoids may show adaptive phenotypic plasticity ( Daza-Bustamante et al, 2002 ; Zepeda-Paulo et al, 2013 ). Indeed, no host race specific differentiation has been detected in Chilean A. ervi populations ( Zepeda-Paulo et al, 2013 ) and a high gene flow predominantly mediated by male dispersion was found between populations ( Zepeda-Paulo et al, 2015 ). Therefore, phenotypic plasticity should be playing a key role in the observed host fidelity ( Henry, Roitberg & Gillespie, 2008 ; Zepeda-Paulo et al, 2013 ).…”

Section: Introductionmentioning

confidence: 99%

Expression differences inAphidius ervi(Hymenoptera: Braconidae) females reared on different aphid host species

Ballesteros

Gadau

Legeai

et al. 2017

PeerJ

Self Cite

View full text Add to dashboard Cite

The molecular mechanisms that allow generalist parasitoids to exploit many, often very distinct hosts are practically unknown. The wasp Aphidius ervi, a generalist koinobiont parasitoid of aphids, was introduced from Europe into Chile in the late 1970s to control agriculturally important aphid species. A recent study showed significant differences in host preference and host acceptance (infectivity) depending on the host A. ervi were reared on. In contrast, no genetic differentiation between A. ervi populations parasitizing different aphid species and aphids of the same species reared on different host plants was found in Chile. Additionally, the same study did not find any fitness effects in A. ervi if offspring were reared on a different host as their mothers. Here, we determined the effect of aphid host species (Sitobion avenae versus Acyrthosiphon pisum reared on two different host plants alfalfa and pea) on the transcriptome of adult A. ervi females. We found a large number of differentially expressed genes (between host species: head: 2,765; body: 1,216; within the same aphid host species reared on different host plants: alfalfa versus pea: head 593; body 222). As expected, the transcriptomes from parasitoids reared on the same host species (pea aphid) but originating from different host plants (pea versus alfalfa) were more similar to each other than the transcriptomes of parasitoids reared on a different aphid host and host plant (head: 648 and 1,524 transcripts; body: 566 and 428 transcripts). We found several differentially expressed odorant binding proteins and olfactory receptor proteins in particular, when we compared parasitoids from different host species. Additionally, we found differentially expressed genes involved in neuronal growth and development as well as signaling pathways. These results point towards a significant rewiring of the transcriptome of A. ervi depending on aphid-plant complex where parasitoids develop, even if different biotypes of a certain aphid host species (A. pisum) are reared on the same host plant. This difference seems to persist even after the different wasp populations were reared on the same aphid host in the laboratory for more than 50 generations. This indicates that either the imprinting process is very persistent or there is enough genetic/allelic variation between A. ervi populations. The role of distinct molecular mechanisms is discussed in terms of the formation of host fidelity.

show abstract

“…The forewing area was used as a proxy for dispersal ability. In parasitoids, dispersal ability strongly influences the host searching performance of the female and mating success of the male individuals (Zepeda‐Paulo et al., ). Our results underlined that as phenotypic differences between guild members may not express themselves equally across all traits, it is important to study multiple traits.…”

Section: Discussionmentioning

confidence: 99%

Multi‐scale and antagonist selection on life‐history traits in parasitoids: A community ecology perspective

et al. 2017

Self Cite

View full text Add to dashboard Cite

Life‐history traits within ecological communities can be influenced by regional environmental conditions (external filters) and community‐wide density‐dependent processes (internal filters). While traits in a regional context may converge to a narrow range of values because of environmental filtering, species belonging to a guild may present contrasting traits as a means of niche differentiation, allowing coexistence whilst exploiting the same resources. To disentangle the role of external and internal filters on phenotypic diversity within ecological communities, we examined the patterns of life‐history trait variation within a guild of insect parasitoids during two successive years across three contrasted regions in relation to several ecological factors. By combining a mean‐field approach and an analysis of phenotypic variance across organizational levels (from individual to guild), we showed that the patterns of life‐history trait variation across regions are consistent with local adaptation or adaptive phenotypic plasticity while the patterns of phenotypic variation within regions suggested how coexistence modulates life‐history traits expression through niche differentiation. Within a given region, phenotypic pattern of parasitoid life‐history traits may also arise from bottom‐up effects of trophic webs: insect host species could also control parasitoid life‐history traits in nature. Our results also showed that parasitoid life‐history traits presented contrasting variation patterns according to the sampling year, suggesting temporal variations in evolutionary and ecological dynamics of parasitoid species. The application of such trait‐based studies to insect parasitoids has the potential to provide further insight on how agricultural environments contribute to differential diversification among natural enemies guilds, highlighting the main role of agricultural landscape management for organisms'responses. A http://onlinelibrary.wiley.com/doi/10.1111/1365-2435.13007/suppinfo is available for this article.

show abstract

Does sex‐biased dispersal account for the lack of geographic and host‐associated differentiation in introduced populations of an aphid parasitoid?

Cited by 16 publications

References 72 publications

Genetic analyses and occurrence of diploid males in field and laboratory populations of Mastrus ridens (Hymenoptera: Ichneumonidae), a parasitoid of the codling moth

Genetic analyses and occurrence of diploid males in field and laboratory populations of Mastrus ridens (Hymenoptera: Ichneumonidae), a parasitoid of the codling moth

Expression differences inAphidius ervi(Hymenoptera: Braconidae) females reared on different aphid host species

Multi‐scale and antagonist selection on life‐history traits in parasitoids: A community ecology perspective

Contact Info

Product

Resources

About