Population genetic structure of two primary parasitoids of Spodoptera frugiperda (Lepidoptera), Chelonus insularis and Campoletis sonorensis (Hymenoptera): to what extent is the host plant important?

AbstractThe study of population genetic structure congruence between hosts and pathogens gives important insights into their shared phylogeographic and coevolutionary histories. We studied the population genetic structure of castrating anther-smut fungi (Microbotryum genus) and of their host plants, the Silene nutans species complex, and the morphologically and genetically close S. italica, which can be found in sympatry. Phylogeographic population genetic structure related to persistence in separate glacial refugia has been recently revealed in the S. nutans plant species complex across Western Europe, identifying several distinct lineages. We genotyped 171 associated plant-pathogen pairs of anther-smut fungi and their host plant individuals using microsatellite markers and plant chloroplastic SNPs. We found clear differentiation between fungal populations parasitizing S. nutans and S. italica plants. The population genetic structure of fungal strains parasitizing the S. nutans plant species complex mirrored the host plant genetic structure, suggesting that the pathogen was isolated in glacial refugia together with its host and/or that it has specialized on the plant genetic lineages. Using random forest approximate Bayesian computation (ABC-RF), we found that the divergence history of the fungal lineages on S. nutans was congruent with the one previously inferred for the host plant and likely occurred with ancient but no recent gene flow. Genome sequences confirmed the genetic structure and the absence of recent gene flow between fungal genetic lineages. Our analyses of host-pathogen individual pairs contribute to a better understanding of co-evolutionary histories between hosts and pathogens in natural ecosystems, in which such studies are still scarce.

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Retraction: Population genetic structure analysis of Sclerotina sclerotiorum (Lib.) de Bary from different host plant species in northern Iran. Hossein B, Seyed AD, Seyed AR. Arch Biol Sci. 2013;65(1)171-81. DOI:10.2298/ABS1301171B

Archives of Biological Sciences ◽

10.2298/abs160412035e ◽

2016 ◽

Vol 68 (3) ◽

pp. 689-689

Author(s):

E Editorial

Keyword(s):

Genetic Structure ◽

Host Plant ◽

Plant Species ◽

Structure Analysis ◽

Sclerotinia Sclerotiorum ◽

Population Genetic Structure ◽

Population Genetic ◽

Morphological Characteristics ◽

Northern Iran ◽

Host Plant Species

The article: Population genetic structure analysis of Sclerotina sclerotiorum (Lib.) de Bary from different host plant species in northern Iran. Hossein B, Seyed AD, Seyed AR. Arch Biol Sci. 2013;65(1) 171-81. DOI:10.2298/ABS1301171B, repeats data already published in: Genetic and morphological diversities in Sclerotinia sclerotiorum isolates in northern parts of Iran. Barari H, Alavi V, Badalyan SM. World App Sci J. 2010;8(3)326-33, and published in: Study of genetic variations based on the morphological characteristics, within the population of Sclerotinia sclerotiorum from the major oilseed planting areas in Iran. Barari H, Alavi V. Int J Biol. 2011;3(2)61-6, without any referencing. Link to the retracted article <a href="http://dx.doi.org/10.2298/ABS1301171B">10.2298/ABS1301171B</a>

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Comparative Genetic Diversity and Structure of the Rhus Gall Aphid Schlechtendalia Chinensis and Its Host-Plant Rhus Chinensis

10.21203/rs.3.rs-134141/v1 ◽

2021 ◽

Author(s):

Zhu Ren ◽

Hong He ◽

Yang Zhang ◽

Xu Su

Keyword(s):

Genetic Diversity ◽

Genetic Structure ◽

Host Plant ◽

Population Genetic Structure ◽

Population Genetic ◽

Isolation By Distance ◽

Geographic Distance ◽

Rhus Chinensis ◽

Genetic Diversity And Structure ◽

Distance Model

Abstract Studying the population genetic structure of both parasites and their host-plants is expected to yield new valuable insights into their coevolution. In this study, we examined and compared the population genetic diversity and structure of 12 populations of the Rhus gall aphid, Schlechtendalia chinensis, and its host-plant, Rhus chinensis, using amplified fragment length polymorphism (AFLP) markers. AMOVA analysis showed that the genetic variance of the aphid and its host-plant were both higher within populations compared to that among them, suggesting that a co-evolutionary history has yielded similar patterns of population genetic structure. We did not detect significant correlation between genetic and geographic distance for either the aphid or host-plant populations, therefore rejecting an isolation by distance model for the demographic histories of the two species. However, our results appeared to suggest that genetically diverse host -plant Rhus populations correlated to similarly genetically diverse populations of gall aphid parasites.

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