Inversion polymorphism in populations of Drosophila subobscura from urban and non-urban environments

Kenig, Bojan; Jelić, Mihailo; Kurbalija, Zorana; Stamenković‐Radak, Marina; Andjelković, Marko

doi:10.2298/abs1003565k

Cited by 10 publications

(8 citation statements)

References 49 publications

(48 reference statements)

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“…In G 0 , the inversions (or chromosomal arrangements) and karyotypes found are characteristic of the Avala mountain population (Zivanovic and Mestres 2010a) and also of the Balkan region (Zivanovic et al 1995(Zivanovic et al , 2002Zivanovic 2007;Rasic et al 2008;Stamenkovic-Radak et al 2008;Kenig et al 2010;Zivanovic and Mestres 2011;Jelić et al 2012). No significant changes between G 0 and G 12 were observed for the inversion and arrangement frequencies.…”

Section: Discussionmentioning

confidence: 94%

Inbreeding and thermal adaptation inDrosophila subobscura

Zivanovic

Arenas

Mestres

2014

Genome

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Using a well-adapted Drosophila subobscura population (Avala, Serbia), a drastic experiment of inbreeding was carried out to assess whether the expected level of homozygosity could be reached or if other evolutionary forces affected the process. In general, no significant changes of inversion (or arrangement) frequencies were detected after 12 brother–sister mating generations. Furthermore, no significant differences were obtained between observed and expected (under the inbreeding model) karyotypic frequencies. Thus, these results seemed to indicate that the main evolutionary factor in the experiment was inbreeding. However, in the G12 generation, complete chromosomal fixation was reached only in two out of the eight final inbred lines. In these lines, the chromosomal compositions were difficult to interpret, but they could be likely a consequence of adaptation to particular laboratory conditions (constant 18 °C, food, light period, etc.). Finally, in a second experiment, the inbred lines presented higher fertility at 18 °C than at 13 °C. Also, there was a significant line effect on fertility: inbred line number 6 (A1, J1, U1+2; U1+2+6, E8, and O3+4+7) presented the highest values, which maybe the result of an adaptation to laboratory conditions. Thus, the results obtained in our experiments reflect the adaptive potential of D. subobscura inversions.

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Section: Discussionmentioning

confidence: 94%

Inbreeding and thermal adaptation inDrosophila subobscura

Zivanovic

Arenas

Mestres

2014

Genome

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“…Urban and non‐urban populations of Drosophila subobscura from Serbia had their genetic structure examined, using chromosome inversions as markers. Despite a strong anthropogenic influence on the population from Belgrade, it did not show any loss in its inversion polymorphisms, as well as in its population size; therefore, this population does not seem to suffer the negative effects caused by human activity and urbanization (Kenig, Jelic, Kurbalija, Stamenkovic‐Radak, & Andjelkovic, ). Their results suggest that divergence in chromosome inversion polymorphisms among Serbian populations of D. subobscura may be an adaptive response to differences among environments they live in (Stamenković‐Radak et al, ).…”

Section: Discussionmentioning

confidence: 96%

“…ns, non-significant; *p < 0.05; **p < 0.01; ***p < 0.001 CV: Capivari; SG: Santa Genebra; CS07: Costa e Silva; CA: Colinas do Atibaia; IT: Itatiaia; TE: Teresópolis. population size; therefore, this population does not seem to suffer the negative effects caused by human activity and urbanization (Kenig, Jelic, Kurbalija, Stamenkovic-Radak, & Andjelkovic, 2010).…”

Section: Markermentioning

confidence: 99%

Comparative analysis of adaptive and neutral markers ofDrosophila mediopunctatapopulations dispersed among forest fragments

Batista

Penha

Sofia

et al. 2018

Ecology and Evolution

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Comparison of adaptive and neutral genetic markers is a valuable approach to characterize the evolutionary consequences of populations living in environments threatened by anthropogenic disturbances, such as forest fragmentation. Shifts in allele frequencies, low genetic variability, and a small effective population size can be considered clear signs of forest fragmentation effects (due to genetic drift) over natural populations, while adaptive responses correlate with environmental variables. Brazilian Atlantic Forest had its landscape drastically reduced and fragmented. Now, several forest remnants are isolated from each other by urban and crop areas. We sampled Drosophila mediopunctata populations from eight forest remnants dispersed on two adjacent geomorphological regions, which are physiognomic and climatically quite distinct. Microsatellite data of inversion‐free chromosomes (neutral genetic marker) indicate low structuration among populations suggesting that they were panmictic and greatly influenced by gene flow. Moreover, significant differences in chromosomal inversion frequencies (adaptive genetic marker) among populations and their correlations with climatic and geographical variables indicate that genetic divergence among populations could be an adaptive response to their environment. Nonetheless, we observed a significant difference in inversion frequencies of a population in two consecutive years that may be associated with edge and demographic effects. Also, it may be reflecting seasonal changes of inversion frequencies influenced by great temperature variation due to edge effects. Moreover, the forest fragment size does not affect genetic variation of neutral markers. Our data indicate that despite oscillations in chromosomal inversion frequencies, D. mediopunctata populations from Brazilian Atlantic Forest and their divergence may be driven by adaptive factors to local differences, perhaps because it is a small flying insect easily carried by the wind increasing its migration rates.

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“…Initial inter-population differences in chromosome arrangement frequencies were expected if we take into account the previous analysis of chromosomal polymorphism of the populations from the same locations [ 23 ]. The differences are due to the diverse evolutionary history of each population originating from ecologically distinct habitats.…”

Section: Discussionmentioning

confidence: 99%

“…subobscura showed that a higher resistance was present in a population originating from the more polluted locality [ 21 ]. It was also found that the extent of inversion polymorphism was higher in urban Drosophila populations, which was a result of the large number of ecological niches in this type of environment [ 22 , 23 ]. However, only few studies have analyzed how historical differences in inversion polymorphisms affect the ability of populations to respond to new environmental conditions, although the prediction of population-specific genetic response to heavy metal pollution is one of the most important tasks of ecotoxicology [ 24 , 25 ].…”

Section: Introductionmentioning

confidence: 99%

Adaptive Role of Inversion Polymorphism of Drosophila subobscura in Lead Stressed Environment

et al. 2015

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Local adaptation to environmental stress at different levels of genetic polymorphism in various plants and animals has been documented through evolution of heavy metal tolerance. We used samples of Drosophila subobscura populations from two differently polluted environments to analyze the change of chromosomal inversion polymorphism as genetic marker during laboratory exposure to lead. Exposure to environmental contamination can affect the genetic content within a particular inversion and produce targets for selection in populations from different environments. The aims were to discover whether the inversion polymorphism is shaped by the local natural environments, and if lead as a selection pressure would cause adaptive divergence of two populations during the multigenerational laboratory experiment. The results showed that populations retain signatures from past contamination events, and that heavy metal pollution can cause adaptive changes in population. Differences in inversion polymorphism between the two populations increased over generations under lead contamination in the laboratory. The inversion polymorphism of population originating from the more polluted natural environment was more stable during the experiment, both under conditions with and without lead. Therefore, results showed that inversion polymorphism as a genetic marker reflects a strong signature of adaptation to the local environment, and that historical demographic events and selection are important for both prediction of evolutionary potential and long-term viability of natural populations.

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Inversion polymorphism in populations of Drosophila subobscura from urban and non-urban environments

Cited by 10 publications

References 49 publications

Inbreeding and thermal adaptation inDrosophila subobscura

Inbreeding and thermal adaptation inDrosophila subobscura

Comparative analysis of adaptive and neutral markers ofDrosophila mediopunctatapopulations dispersed among forest fragments

Adaptive Role of Inversion Polymorphism of Drosophila subobscura in Lead Stressed Environment

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