Retention of ancestral polymorphism in Culex nigripalpus (Diptera: Culicidae) from São Paulo, Brazil

Wilke, André Barretto Bruno; Carvalho, Gabriela Ferreira; Marrelli, Mauro Toledo

doi:10.1016/j.meegid.2018.08.017

Cited by 7 publications

(6 citation statements)

References 53 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, as there are no geographic barriers, such as mountains, bodies of water, or a large canyon between the environments, our results indicated that the specimens represent a large, well-distributed population with a high overall genetic homogeneity. Previous studies carried out with mosquitoes from Brazil on a micro-geographic scale, suggest that native species exhibited weaker genetic structure while invasive species were shown to be more genetically structured and diverse 10,11,63,64 .…”

Section: Discussionmentioning

confidence: 95%

The influence of anthropogenic habitat fragmentation on the genetic structure and diversity of the malaria vector Anopheles cruzii (Diptera: Culicidae)

Multini

Souza

Marrelli

et al. 2020

Sci Rep

Self Cite

View full text Add to dashboard Cite

Fragmentation of natural environments as a result of human interference has been associated with a decrease in species richness and increase in abundance of a few species that have adapted to these environments. The Brazilian Atlantic Forest, which has been undergoing an intense process of fragmentation and deforestation caused by human-made changes to the environment, is an important hotspot for malaria transmission. The main vector of simian and human malaria in this biome is the mosquito Anopheles cruzii. Anthropogenic processes reduce the availability of natural resources at the tree canopies, An. cruzii primary habitat. As a consequence, An. cruzii moves to the border of the Atlantic Forest nearing urban areas seeking resources, increasing their contact with humans in the process. We hypothesized that different levels of anthropogenic changes to the environment can be an important factor in driving the genetic structure and diversity in An. cruzii populations. Five different hypotheses using a cross-sectional and a longitudinal design were tested to assess genetic structure in sympatric An. cruzii populations and microevolutionary processes driving these populations. Single nucleotide polymorphisms were used to assess microgeographic genetic structure in An. cruzii populations in a low-endemicity area in the city of São Paulo, Brazil. Our results show an overall weak genetic structure among the populations, indicating a high gene flow system. However, our results also pointed to the presence of significant genetic structure between sympatric An. cruzii populations collected at ground and tree-canopy habitats in the urban environment and higher genetic variation in the ground-level population. This indicates that anthropogenic modifications leading to habitat fragmentation and a higher genetic diversity and structure in ground-level populations could be driving the behavior of An. cruzii, ultimately increasing its contact with humans. Understanding how anthropogenic changes in natural areas affect An. cruzii is essential for the development of more effective mosquito control strategies and, on a broader scale, for malaria-elimination efforts in the Brazilian Atlantic Forest.

show abstract

Section: Discussionmentioning

confidence: 95%

The influence of anthropogenic habitat fragmentation on the genetic structure and diversity of the malaria vector Anopheles cruzii (Diptera: Culicidae)

Multini

Souza

Marrelli

et al. 2020

Sci Rep

Self Cite

View full text Add to dashboard Cite

show abstract

“…fluviatilis and Cx . nigripalpus [35,38]. This contrast between the genetic structure of native and invasive species may indicate that invasive species are better able to adapt and thrive in urban environments, an advantage that is clearly of epidemiological relevance.…”

Section: Discussionmentioning

confidence: 99%

“…Urbanization processes are often responsible for driving the genetic diversity within urban populations of mosquitoes [2,6]. This phenomenon is undoubtedly occurring in mosquito species such as Aedes aegypti , Aedes fluviatilis , Culex nigripalpus , and Culex quinquefasciatus in the city of São Paulo, Brazil [35–38]. São Paulo is a megacity with approximately 12 million people in the center of a metropolitan area with a population of more than 20 million [39].…”

Section: Introductionmentioning

confidence: 99%

Population structuring of the invasive mosquito Aedes albopictus (Diptera: Culicidae) on a microgeographic scale

et al. 2019

Self Cite

View full text Add to dashboard Cite

Aedes albopictus is an invasive mosquito species that has spread globally and can transmit several arboviruses, including dengue, chikungunya and yellow fever. The species was first reported in Brazil in 1986 and since then has been found in 24 of the 27 Brazilian states, often in peri-urban environments close to highly urbanized areas. To date, population genetics of this important mosquito in areas in the city of São Paulo has not been investigated. In this study, we used 12 microsatellite loci to investigate the microgeographic population genetics of Ae . albopictus , which is present throughout the city of São Paulo. All the analyses revealed structuring of the populations studied, divided into two groups with restricted gene flow between them and without evidence of isolation by distance. We propose two hypotheses to explain the results: (i) low dispersal capability—limited gene flow between populations is due to the low dispersal capability inherent to Ae . albopictus ; and (ii) multiple introductions—the structure identified here results from multiple introductions, which led to different dispersal patterns within the city and more genetic heterogeneity. The ability of Ae . albopictus to invade new areas and expand may explain why these mosquito populations appear to be well established and thriving in the city of São Paulo.

show abstract

“…3C). The retention of ancestral polymorphism, also well known as incomplete lineage sorting, was generally implicated in conflicts between gene trees and the species tree (Pollard et al, 2006;Scornavacca & Galtier, 2017) or mitonuclear discordance (DeBiasse et al, 2014), but was rarely stressed at the intraspecific population level (Wilke et al, 2018), reflecting the initial stage of phylogeography.…”

Section: Genetic Admixtures Between the Two Lineagesmentioning

confidence: 99%

Cryptic lineages and potential introgression in a mixed‐ploidy species (Phragmites australis) across temperate China

Liu

Yin

Guo

et al. 2020

J of Sytematics Evolution

View full text Add to dashboard Cite

Polyploidization and hybridization are very common in natural plant species, and mixed-ploidy species provide a unique opportunity to study the effects of evolutionary history, local abundance, and ploidy level on the direction and extent of introgression between intraspecific lineages. First, we delimited two morphologically cryptic lineages of Phragmites australis Trin. ex Steud. in temperate China using 11 nuclear microsatellites and two chloroplast DNA fragments with 225 samples from China as well as 11 samples from Oceania and Europe. Our evidence supported that haplotype O and haplotype P were two relatively independent lineages with low and high ploidy levels, respectively; haplotype M might be ancient and could have undergone a complex evolutionary history. Then we examined the lineage divergence and compared the introgression patterns between two major lineages along geographical and abundance gradients with a large number of samples (n = 1067) collected from China. The sympatric coexistence of two lineages in north and northeast China implies an ongoing or potential introgression between them. Cline analysis showed that the level of genetic admixture were significantly correlated with longitude rather than latitude. Our results also suggested that ploidy level could deeply influence the introgression asymmetry, and the effect of the current local abundance on introgression might be covered by the past coexistence time driven by phylogeographic history. Our study draws a baseline for future research on the ecological and evolutionary consequences of migration and introgression of Chinese P. australis under global change.

show abstract

Retention of ancestral polymorphism in Culex nigripalpus (Diptera: Culicidae) from São Paulo, Brazil

Cited by 7 publications

References 53 publications

The influence of anthropogenic habitat fragmentation on the genetic structure and diversity of the malaria vector Anopheles cruzii (Diptera: Culicidae)

The influence of anthropogenic habitat fragmentation on the genetic structure and diversity of the malaria vector Anopheles cruzii (Diptera: Culicidae)

Population structuring of the invasive mosquito Aedes albopictus (Diptera: Culicidae) on a microgeographic scale

Cryptic lineages and potential introgression in a mixed‐ploidy species (Phragmites australis) across temperate China

Contact Info

Product

Resources

About