Population genetics of two chromatic morphs of the Chagas disease vector Rhodnius pallescens Barber, 1932 in Panamá

Kieran, Troy J.; Bayona‐Vásquez, Natalia J.; Varian, Christina P.; Saldaña, Azäel; Samudio, Franklyn; Calzada, José E.; Gottdenker, Nicole; Glenn, Travis C.

doi:10.1016/j.meegid.2020.104369

Cited by 4 publications

(3 citation statements)

References 108 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Molecular‐systematics and integrative studies have revealed levels of genetic divergence compatible with multiple species in Rhodnius robustus (Monteiro et al, 2003); R . pallescens (Díaz et al, 2014; Kieran et al, 2020); R. ecuadoriensis (Abad‐Franch et al, 2021); T . dimidiata (Monteiro et al, 2013); T .…”

Section: Discussionmentioning

confidence: 99%

“…Sibling speciation, whereby a common ancestral stock diversifies into a group of closely related, cryptic species, (a 'cryptic species complex', sensu Monteiro et al, 2018), seems to be relatively common in the Triatominae. Molecular-systematics and integrative studies have revealed levels of genetic divergence compatible with multiple species in Rhodnius robustus (Monteiro et al, 2003); R. pallescens (Díaz et al, 2014;Kieran et al, 2020); R. ecuadoriensis (Abad-Franch et al, 2021); T. dimidiata (Monteiro et al, 2013); T. sordida (Panzera et al, 2015); T. rubida (Pfeiler et al, 2006); T. patagonica (Nattero et al, 2016); Panstrongylus rufotuberculatus (Pita et al, 2021); and…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Molecular and cytogenetic evidence for sibling species in the Chagas disease vector Triatoma maculata

Gómez-Palacio

Pita

Abad‐Franch

et al. 2022

Medical Vet Entomology

View full text Add to dashboard Cite

Triatoma maculata (Hemiptera, Reduviidae, Triatominae) occurs across dry‐to‐semiarid ecoregions of northern South America, where it transmits Trypanosoma cruzi, causative agent of Chagas disease. Using 207 field‐caught specimens from throughout the species' range, mitochondrial(mt) DNA sequence data, and cytogenetics, we investigated inter‐population genetic diversity and the phylogenetic affinities of T. maculata. Mitochondrial DNA sequence analyses (cytb and nd4) disclosed a monophyletic T. maculata clade encompassing three distinct geographic groups: Roraima formation (Guiana shield), Orinoco basin, and Magdalena basin (trans‐Andean). Between‐group cytb distances (11.0–12.8%) were larger than the ~7.5% expected for sister Triatoma species; the most recent common ancestor of these T. maculata groups may date back to the late Miocene. C‐heterochromatin distribution and the sex‐chromosome location of 45S ribosomal DNA clusters both distinguished Roraima bugs from Orinoco and Magdalena specimens. Cytb genealogies reinforced that T. maculata is not sister to Triatoma pseudomaculata and probably represents an early (middle‐late Miocene) offshoot of the ‘South American Triatomini lineage’. In sum, we report extensive genetic diversity and deep phylogeographic structuring in T. maculata, suggesting that it may consist of a complex of at least three sibling taxa. These findings have implications for the systematics, population biology, and perhaps medical relevance of T. maculata sensu lato.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Molecular and cytogenetic evidence for sibling species in the Chagas disease vector Triatoma maculata

Gómez-Palacio

Pita

Abad‐Franch

et al. 2022

Medical Vet Entomology

View full text Add to dashboard Cite

show abstract

“… 82 , 83 , 84 , 85 For example, in a natural hybrid zone identified in the State of Pernambuco, Brazil, 13 phenotypes (nine of them intermediate between T. b. brasiliensis and T. juazeirensis ) were revealed for T. brasiliensis complex, based on molecular analysis. 86 On the other hand, the possibility of the existence of new species due to the detection of genetic variations in taxa that are now considered a single taxon, such as Mepraia Mazza, Gajardo & Jörg, 1940; 87 R. pallescens Barber, 1932; 88 T. patagonica Del Ponte, 1929; 89 T. costalimai Verano & Galvão, 1958; 90 and R. ecuadoriensis , 91 , 92 , 93 , 94 was demonstrated.…”

mentioning

confidence: 99%

Do the new triatomine species pose new challenges or strategies for monitoring Chagas disease? An overview from 1979-2021

Costa

Dale

Galvão

et al. 2021

Mem. Inst. Oswaldo Cruz

View full text Add to dashboard Cite

Chagas disease persists as one of the most important, and yet most neglected, diseases in the world, and several changes in its epidemiological aspects have been recorded since its discovery. Currently, some of the most relevant changes are related to: (i) the reduction in the incidence of the endemic due to the control of the most important vectors, Triatoma infestans and Rhodnius prolixus , in many countries; (ii) the migration of human populations spreading cases of the disease throughout the world, from endemic to non-endemic areas, transforming Chagas disease into a global threat; and (iii) new acute cases and deaths caused by oral transmission, especially in the north of Brazil. Despite the reduction in the number of cases, new challenges need to be responded to, including monitoring and control activities aiming to prevent house infestation by the secondary vectors from occurring. In 1979, Lent & Wygodzinsky (1) published the most complete review of the subfamily Triatominae, encompassing 111 recognised species in the taxon. Forty-two years later, 46 new species and one subspecies have been described or revalidated. Here we summarise the new species and contextualise them regarding their ecology, epidemiologic importance, and the obstacles they pose to the control of Chagas disease around the world.

show abstract

Genetic diversity of the Chagas vector Triatoma dimidiata s.l. (Hemiptera: Reduviidae) across geographic scales in a top-priority area for control

Melgar,

Castellanos,

Stevens

et al. 2024

Journal of Medical Entomology

View full text Add to dashboard Cite

Population genetic structure of arthropod disease vectors provides important information on vector movement and climate or other environmental variables that influence their distribution. This information is critical for data-driven vector control. In the first comprehensive study of the genetic structure of T. dimidiata s.l. (Latreille, 1811) we focus on an area of active transmission designated as a top priority for control. We examined a high number of specimens across a broad geographic area along the border of Guatemala and El Salvador including multiple spatial scales using a high number of genome-wide markers. Measuring admixture, pairwise genetic differentiation, and relatedness, we estimated the specimens represented three genetic clusters. We found evidence of movement (migration/gene flow) across all spatial scales with more admixture among locations in El Salvador than in Guatemala. Although there was significant isolation by distance, the 2 close villages in Guatemala showed either the most or least genetic variation indicating an additional role of environmental variables. Further, we found that social factors may be influencing the genetic structure. We demonstrated the power of genomic studies with a large number of specimens across a broad geographic area. The results suggest that for effective vector control movement must be considered on multiple spatial scales along with its contributing factors.

show abstract

Population genetics of two chromatic morphs of the Chagas disease vector Rhodnius pallescens Barber, 1932 in Panamá

Cited by 4 publications

References 108 publications

Molecular and cytogenetic evidence for sibling species in the Chagas disease vector Triatoma maculata

Molecular and cytogenetic evidence for sibling species in the Chagas disease vector Triatoma maculata

Do the new triatomine species pose new challenges or strategies for monitoring Chagas disease? An overview from 1979-2021

Genetic diversity of the Chagas vector Triatoma dimidiata s.l. (Hemiptera: Reduviidae) across geographic scales in a top-priority area for control

Contact Info

Product

Resources

About