Cross-mating experiments detect reproductive compatibility between Triatoma sherlocki and other members of the Triatoma brasiliensis species complex

Correia, Nathália Cordeiro; Almeida, Carlos Eduardo; Lima-Neiva, Vanessa; Gumiel, Márcia; Dornak, L. Lynnette; Lima, Marli Maria; Medeiros, Lívia M.O.; Mendonça, Vagner José; Rosa, João Aristeu da; Costa, Jane

doi:10.1016/j.actatropica.2013.06.019

Cited by 33 publications

(28 citation statements)

References 43 publications

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“…The crosses between M. phyllosomus females and T. recurva males resulted in infertility of eggs in the F1 offspring. A similar phenomenon was recorded among T. lenti and T. sherlocki (Correia et al ).…”

Section: Discussionsupporting

confidence: 83%

Biological aspects of crosses betweenTriatoma recurva(Stål), 1868 (Hemiptera: Reduviidae: Triatominae) and other members of the Phyllosoma complex

Martínez-Ibarra

Nogueda‐Torres

Licón-Trillo

et al. 2015

Journal of Vector Ecology

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The degree of reproductive isolation between Triatoma recurva (Stål) (Hemiptera: Reduviidae: Triatominae) and the six species of the genus Meccus plus T. mexicana (Herrich-Schaeffer) (Hemiptera: Reduviidae) was examined. Fertility and the segregation of morphological characteristics were examined in two generations of hybrids from crosses between these species. The percentage of couples with offspring (fertile) was low in the vast majority of sets of crosses, with the exception of that between T. recurva female and M. phyllosomus male. In all studied sets of crosses, no first-(F1) or second-(F2) generation individuals were morphologically similar to T. recurva but instead shared the morphology of the other parental species. A similar phenomenon was observed in the three successful sets of backcrosses. These results indicated that different recorded levels of reproductive fitness among T. recurva and the species of Meccus involved in this study, plus T. mexicana, are present and that they were apparently influenced by differing mechanisms of isolation. The presence of some degree of reproductive compatibility between studied triatomines of distinct genera (Meccus spp. and Triatoma spp.) reinforces the need for generic revision of the tribe Triatomini. Journal of Vector Ecology 40 (1): 117-121. 2015.

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Section: Discussionsupporting

confidence: 83%

Biological aspects of crosses betweenTriatoma recurva(Stål), 1868 (Hemiptera: Reduviidae: Triatominae) and other members of the Phyllosoma complex

Martínez-Ibarra

Nogueda‐Torres

Licón-Trillo

et al. 2015

Journal of Vector Ecology

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“…Triatoma sherlocki is the only species in the complex that is flightless, although its dispersal capacity may be compensated by longer legs and possibly better walking ability [17]. A recent study found support for high reproductive compatibility between T. sherlocki and the remaining members of T. brasiliensis species complex [18]. What is more, laboratory progeny between the parapatric T. juazeirensis and T. sherlocki were more vigorous in terms of longevity and dispersal capacity [17,65].…”

Section: Discussionmentioning

confidence: 99%

Distributional potential of the Triatoma brasiliensis species complex at present and under scenarios of future climate conditions

et al. 2014

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BackgroundThe Triatoma brasiliensis complex is a monophyletic group, comprising three species, one of which includes two subspecific taxa, distributed across 12 Brazilian states, in the caatinga and cerrado biomes. Members of the complex are diverse in terms of epidemiological importance, morphology, biology, ecology, and genetics. Triatoma b. brasiliensis is the most disease-relevant member of the complex in terms of epidemiology, extensive distribution, broad feeding preferences, broad ecological distribution, and high rates of infection with Trypanosoma cruzi; consequently, it is considered the principal vector of Chagas disease in northeastern Brazil.MethodsWe used ecological niche models to estimate potential distributions of all members of the complex, and evaluated the potential for suitable adjacent areas to be colonized; we also present first evaluations of potential for climate change-mediated distributional shifts. Models were developed using the GARP and Maxent algorithms.ResultsModels for three members of the complex (T. b. brasiliensis, N = 332; T. b. macromelasoma, N = 35; and T. juazeirensis, N = 78) had significant distributional predictivity; however, models for T. sherlocki and T. melanica, both with very small sample sizes (N = 7), did not yield predictions that performed better than random. Model projections onto future-climate scenarios indicated little broad-scale potential for change in the potential distribution of the complex through 2050.ConclusionsThis study suggests that T. b. brasiliensis is the member of the complex with the greatest distributional potential to colonize new areas: overall; however, the distribution of the complex appears relatively stable. These analyses offer key information to guide proactive monitoring and remediation activities to reduce risk of Chagas disease transmission.

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“…Other studies report the occurrence of natural homoploid hybrids between T. infestans and Triatoma platensis Neiva, 1913 , T. infestans and Triatoma rubrovaria , and sympatric species of Phyllosoma complex and species of the T. brasiliensis complex. In addition, several hybrid species have been obtained experimentally [24]. This interspecific crossing can be decisive in originating and diversifying wild species, resulting in important epidemiological consequences due to differential competence and the capacity of hybrid vectors [3, 10, 11].…”

Section: Discussionmentioning

confidence: 99%

Mitochondrial PCR-RFLP Assay to DistinguishTriatoma brasiliensis macromelasomafromTriatoma brasiliensis brasiliensisSubspecies (Hemiptera: Reduviidae)

Vendrami

Ceretti-Júnior

Obara

et al. 2013

Journal of Tropical Medicine

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Triatoma brasiliensis sensu lato (s.l.), the main vector of Chagas disease in northeastern Brazil, is a species complex comprising four species, one with two subspecies (T. brasiliensis brasiliensis, T. brasiliensis macromelasoma, T. juazeirensis, T. sherlocki, and T. melanica), and each taxon displaying distinct ecological requirements. In order to evaluate the genetic relationships among nine T. brasiliensis s.l. populations from northeastern Brazil, we analyzed their mitochondrial cytochrome c oxidase subunit 1 sequences and suggested a PCR-RFLP assay to distinguish between T. b. macromelasoma and T. b. brasiliensis subspecies. All the specimens were morphologically identified as T. b. brasiliensis. The resulting phylogenies identified two major clades that are congruent with the geographical populations studied. Based on collection sites and in accordance with type-location, one clade was identified as the subspecies T. b. macromelasoma. The second clade grouped T. b. brasiliensis populations. Restriction endonuclease sites were observed in the sequences and used in PCR-RFLP assays, producing distinct fingerprints for T. b. macromelasoma and T. b. brasiliensis populations. The results suggest that these are different species and that gene flow occurs only among T. b. brasiliensis populations, possibly associated with human activity in the area.

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Cross-mating experiments detect reproductive compatibility between Triatoma sherlocki and other members of the Triatoma brasiliensis species complex

Cited by 33 publications

References 43 publications

Biological aspects of crosses betweenTriatoma recurva(Stål), 1868 (Hemiptera: Reduviidae: Triatominae) and other members of the Phyllosoma complex

Biological aspects of crosses betweenTriatoma recurva(Stål), 1868 (Hemiptera: Reduviidae: Triatominae) and other members of the Phyllosoma complex

Distributional potential of the Triatoma brasiliensis species complex at present and under scenarios of future climate conditions

Mitochondrial PCR-RFLP Assay to DistinguishTriatoma brasiliensis macromelasomafromTriatoma brasiliensis brasiliensisSubspecies (Hemiptera: Reduviidae)

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