Karyotype and spermatogenesis in Triatoma lenti (Hemiptera: Triatominae), a potential Chagas vector

Alevi, Kaio Cesar Chaboli; Mendonca, Priscila Pasqueetto; Succi, Maysa; Pereira, Nathália Paiva; Rosa, João Aristeu da; Azeredo-Oliveira, Maria Tercília Vilela de

doi:10.4238/2012.december.17.3

Cited by 22 publications

(17 citation statements)

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“…The authors described the karyotype of the species Triatoma lenti Sherlock and Serafim, 1967 [15] and Triatoma melanocephala Neiva and Pinto, 1923 [16], and observed that Triatoma melanocephala Neiva and Pinto, 1923, as well as Triatoma vitticeps Stal, 1859 and Triatoma tibiamaculata Pinto, 1926 showed fragmentation of the sex chromosome X, different from other species also grouped in Brasiliensis subcomplex. Thus, as the initial proposal of the grouping of species in the subcomplex was performed using basically morphological data and geographical distribution [5], the number of chromosomes showed to be an important tool cytotaxonomic and, therefore, was proposed the exclusion of the three species with fragmented sex chromosome X of Brasiliensis subcomplex [16].…”

Section: Introductionmentioning

confidence: 99%

Mini Review: Karyotypic Survey in Triatominae Subfamily (Hemiptera,Heteroptera)

Alevi¹,

Rosa²,

Azeredo-Oliveira³

2013

Entomol Ornithol Herpetol

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Section: Introductionmentioning

confidence: 99%

Mini Review: Karyotypic Survey in Triatominae Subfamily (Hemiptera,Heteroptera)

Alevi¹,

Rosa²,

Azeredo-Oliveira³

2013

Entomol Ornithol Herpetol

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“…The fragmentation of the sex chromosome X is a derived characteristic, since according to Ueshima (1966), the sex determination system in the ancestral subfamily Triatominae is XY. This peculiarity has been described in the literature in only four species, namely T. melanocephala (Alevi et al, 2012a), T. vitticeps (Schreiber and Pellegrino, 1950), T. eratyrusiformis (Panzera et al, 2010), and Panstrongylus lutzi (Santos, 2010). Of these species, only T. vitticeps and P. lutzi show the heterochromatin pattern described.…”

Section: Resultsmentioning

confidence: 99%

“…Alevi et al (2012a), according to karyotyping, proposed the exclusion of T. melanocephala, as well as T. vitticeps and T. tibiamaculata, from the subcomplex, which shows fragmentation of X sex chromosomes, thereby approaching the species of North America.…”

Section: Introductionmentioning

confidence: 99%

“…However, experimental crosses , molecular (Mendonça et al, 2009;Gardim et al, 2014), enzymatic (Costa et al, 1997), and cytogenetic (Panzera et al, 2010(Panzera et al, , 2012Alevi et al, 2012aAlevi et al, , 2013aSucci et al, 2014) techniques have been used as important tools to aid in the classification of species.…”

Section: Introductionmentioning

confidence: 99%

“…Cytogenetic data, such as the number of chromosomes and the pattern of constitutive heterochromatin, were also used to group the species of the Brasiliensis subcomplex (Panzera et al, 2010;Alevi et al, 2012aAlevi et al, ,b, 2013aAlevi et al, ,b,c,d,e, 2014a. Thus, cytotaxonomy has turned out to be an important tool in the systematics of triatomines.…”

Section: Introductionmentioning

confidence: 99%

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Distribution of constitutive heterochromatin in Triatoma melanocephala (Hemiptera, Triatominae)

2014

Self Cite

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ABSTRACT. In principle, Triatoma melanocephala was included in the Brasiliensis subcomplex on the basis of morphological parameters and geographical layout, since there were no other relevant data available in the literature. On the basis of karyotype, it has been proposed to exclude T. melanocephala, as well as of T. vitticeps and T. tibiamaculata, from the subcomplex, which shows fragmentation of the X sex chromosomes, thereby approaching the species of North America. Therefore, the present study aimed to determine the pattern of constitutive heterochromatin of T. melanocephala to provide new data on the cytotaxonomy of this vector of Chagas disease and especially to try to relate this species to some group, complex or subcomplex of triatomine species, aiding in their classification. This species showed no constitutive heterochromatin in the autosomes or X sex chromosome, but only the Y sex chromosome. The number of chromosomes and heterochromatin pattern of T. melanocephala proved to be identical to that described for Panstrongylus lutzi. Thus, the present study demonstrated a tentative relationship between T. melanocephala and P. lutzi. However, we emphasize that other comparative studies should be conducted between these species, such as experimental crosses and molecular, enzymatic, morphological, and morphometric analyses to determine whether these species are actually evolutionarily related or if the number of chromosomes and the heterochromatin pattern emerged as homoplasies in T. melanocephala and P. lutzi.

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Nucleolar persistence during spermatogenesis of the genus Rhodnius (Hemiptera, Triatominae)

Alevi

Castro

Lima

et al. 2014

Cell Biology International

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The Triatominae subfamily is comprised of 18 genera and six tribes. The tribe Rhodniini is comprised of two genera (Rhodnius and Psammolestes). Nucleolar persistence is defined by the presence of the nucleolus or nucleolar corpuscles during the meiotic metaphase. To date, this phenomenon has been described for 13 species of triatomine that are included in the genera Triatoma, Rhodnius, and Panstrongylus. Thus, because the phenomenon of nucleolar persistence has been described in only two species of the genus Rhodnius, we have analyzed the nucleolar behavior during spermatogenesis of eight species of the genus Rhodnius (R. colombiensis, R. montenegrensis, R. nasutus, R. neglectus, R. neivai, R. pictipes, R. prolixus, and R. robustus), with a focus on nucleolar persistence. By means of cytogenetic analysis with silver ions, nucleolar behavior during spermatogenesis is described in the eight species of Rhodnius analyzed. In all of them nucleolar behavior was similar and the phenomenon of nucleolar persistence was often observed. Therefore, we confirm nucleolar persistence as a peculiarity of the genus Rhodnius. However, it is emphasized that new cytogenetic analysis should be performed in the Triatominae subfamily, more specifically among the 15 genera that do not exhibit the nucleolar behavior described, in order to assess whether this phenomenon is truly a synapomorphy of these hematophagous insects.

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Karyotype and spermatogenesis in Triatoma lenti (Hemiptera: Triatominae), a potential Chagas vector

Cited by 22 publications

References 13 publications

Mini Review: Karyotypic Survey in Triatominae Subfamily (Hemiptera,Heteroptera)

Mini Review: Karyotypic Survey in Triatominae Subfamily (Hemiptera,Heteroptera)

Distribution of constitutive heterochromatin in Triatoma melanocephala (Hemiptera, Triatominae)

Nucleolar persistence during spermatogenesis of the genus Rhodnius (Hemiptera, Triatominae)

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