C-heterochromatin polymorphism in holocentric chromosomes of Triatoma infestans (Hemiptera: Reduviidae)

Genome ◽  
1992 ◽  
Vol 35 (6) ◽  
pp. 1068-1074 ◽  
Author(s):  
Fco Panzera ◽  
F. Alvarez ◽  
J. Sanchez-Rufas ◽  
R. Pérez ◽  
J. A. Suja ◽  
...  
Keyword(s):  
Chagas Disease ◽  
Intraspecific Variation ◽  
Natural Populations ◽  
Chromosomal Polymorphism ◽  
Triatoma Infestans ◽  
Holocentric Chromosomes ◽  
Marked Variation ◽  
Geographical Pattern ◽  
First Report ◽  
Heterochromatin Polymorphism

This is the first report of intraspecific variation of C-bands in Heteroptera, described in natural populations of Triatoma infestans (Hemiptera: Reduviidae), the main vector of Chagas disease in Uruguay. Marked variation in number, position, and size of C-heterochromatic bands was found in the three large autosomal pairs. A geographical pattern of this chromosomal polymorphism was observed. Evolutionary importance and epidemiological relevance are discussed.Key words: Triatoma infestans, cytogenetics, C-band polymorphism, holocentric chromosomes, Chagas disease.

scholarly journals First report of two kdr mutations L1014F/S in natural populations of Triatoma pallidipennis Stal and Triatoma picturata Usinger vectors of Chagas disease in Mexico

2019 ◽  
Vol 44 (2) ◽  
pp. 285-289
Author(s):  
Jesus Davila‐Barboza ◽  
O. Karina Villanueva‐Segura ◽  
Gustavo Ponce‐Garcia ◽  
Beatriz Lopez‐Monroy ◽  
Iram P. Rodiguez‐Sanchez ◽  
...  
Keyword(s):  
Chagas Disease ◽  
Natural Populations ◽  
First Report

scholarly journals The Drosophila fertility factor kl-3 is linked to the Y-chromosome of the vector of Chagas’ disease Triatoma infestans (Hemiptera: Reduviidae) and is essential for male fertility

2019 ◽  
Author(s):  
Carlos H. Martins ◽  
Rodrigo S. V. P da Silva ◽  
Thalia K. Ferreira ◽  
Rafaela Paim ◽  
Grasielle C. D. Pessoa ◽  
...  
Keyword(s):  
Y Chromosome ◽  
Chagas Disease ◽  
Male Fertility ◽  
Triatoma Infestans ◽  
Control Group ◽  
Linked Gene ◽  
First Report ◽  
Functional Studies ◽  
Bioinformatic Tools ◽  
Sexual Determination

AbstractIn many insects, the Y chromosome plays a key role in sexual determination and male fertility. The Chagas disease vector Triatoma infestans has 22 autosomal chromosomes and a pair of XY sex chromosomes. However, the knowledge on the Y chromosome of this species, its genetic content or its biological function, is very poor. Due to repetitive DNA, Y chromosome sequences are poorly assembled in genome projects, hindering structural and functional studies on Y-linked genes. Our group has developed many of the bioinformatic tools to identify Y-linked sequences in assembled genomes. Here, we describe the identification of a γ-dynein heavy chain linked to the Y-chromosome of T. infestans. This protein is orthologous to the Drosophila melanogaster Y-linked gene kl-3. In D. melanogaster, dyneins of the Y chromosome are known as male fertility factors and their deletion causes male infertility. We performed knockdown of the kl-3 expression to ascertain its function in T. infestans. Our results showed that injection of dsKL3 reduced, significantly, the fertility of T. infestans males (p<0.01). The mean number of eggs laid by the control group was 35.64 eggs/couple while the kl-3 knockdown group was of 11.82 eggs/couple (five couples did not lay any eggs). Differences in eclosion rate was even more significant, with a hatching mean rate of 16.85±10.03 and 1.69±3.58 (p<0.001) for the control and the silenced groups respectively. Our results suggest that kl-3 maintains its functional role as essential for male fertility in T. infestans. Hence, it seems that the Y-chromosome of T. infestans has a key role in male fertility. This is the first report of a kl-3 orthologue linked to the Y chromosome of an insect species outside the diptera clade. In addition to the first report of a Y-linked gene in T. infestans with a role for male fertility, this finding is of great relevance for the study of the evolution of Y chromosomes and further studies that could lead to novel approaches in insect control.

Improving houses in the Bolivian Chaco increases effectiveness of residual insecticide spraying against infestation with Triatoma infestans, vector of Chagas disease

2021 ◽  
Author(s):  
Raquel Gonçalves ◽  
Daniel Landivar ◽  
Edson Grover Sañez Liendo ◽  
Janet Mamani Fernandez ◽  
Hanafy M. Ismail ◽  
...  
Keyword(s):  
Chagas Disease ◽  
Triatoma Infestans

scholarly journals Molecular Population Genetics and Evolution of the Chagas’ Disease Vector Triatoma infestans (Hemiptera: Reduviidae)

2013 ◽  
Vol 14 (5) ◽  
pp. 316-323 ◽  
Author(s):  
Beatriz García ◽  
Alicia R. Pérez Rosas ◽  
María Blariza ◽  
Carla Grosso ◽  
Cintia Fernández ◽  
...  
Keyword(s):  
Population Genetics ◽  
Chagas Disease ◽  
Triatoma Infestans ◽  
Disease Vector ◽  
Molecular Population Genetics

scholarly journals Intensified Surveillance and Insecticide-based Control of the Chagas Disease Vector Triatoma infestans in the Argentinean Chaco

2013 ◽  
Vol 7 (4) ◽  
pp. e2158 ◽  
Author(s):  
Juan M. Gurevitz ◽  
María Sol Gaspe ◽  
Gustavo F. Enriquez ◽  
Yael M. Provecho ◽  
Uriel Kitron ◽  
...  
Keyword(s):  
Chagas Disease ◽  
Triatoma Infestans ◽  
Disease Vector

scholarly journals The initial success of the Chagas' Disease Control Program: factors contributing to Triatomine infestation

1992 ◽  
Vol 8 (4) ◽  
pp. 391-403 ◽  
Author(s):  
Millicent Fleming-Moran
Keyword(s):  
Chagas Disease ◽  
Control Program ◽  
Triatoma Infestans ◽  
Linear Regression Models ◽  
Disease Vector ◽  
Disease Control Program ◽  
Household Crowding ◽  
Favorable Conditions ◽  
House Infestation ◽  
Regional Comparisons

While the control of the major Chagas' disease vector Triatoma infestans has been achieved in many endemic areas of Brazil, data from the inception of the control program in the Triângulo Mineiro (1976-79) suggest that re-infestation by triatomines occurs under certain favorable conditions. The percentage of houses infested in 500 communities of the Triângulo Mineiro region is compared for two years: 1976 and 1979, using linear regression models. Controlling for three major triatomine vectors, household crowding, house demolition and construction, and infested out-buildings are all independent covariates of house infestation in these communities. While several household factors have been suggested as correlates of infestation, the control program focuses on community-level reductions in infestation, but intra-community or regional comparisons have heretofore been unfeasible. Computerized data are becoming available to identify communities at high risk for re-infestation, and for targeting control-program activities.

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