Physical map of repetitive DNA and karyotype evolution in three species of the genusOmophoita(Coleoptera: Alticinae)

Mello, L. R. A.; Tasior, D.; Goll, Leonardo Gusso; Artoni, Roberto Ferreira; Vicari, Marcelo Ricardo; Nogaroto, Viviane; Almeida, Mara Cristina de

doi:10.1080/11250003.2014.882995

Cited by 8 publications

(22 citation statements)

References 58 publications

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“…In the Chrysomelidae, the constitutive heterochromatin occurs predominantly in the pericentromeric region (Almeida et al, , 2009Mello et al, 2014). This same pattern was also observed in the autosomal chromosomes of Coleoptera (Virkki, 1983, Schneider et al, 2006Mello et al, 2014).…”

Section: Introductionsupporting

confidence: 51%

“…This same pattern was also observed in the autosomal chromosomes of Coleoptera (Virkki, 1983, Schneider et al, 2006Mello et al, 2014). In the sex chromosomes, the heterochromatin can extend to all chromosome arms or is restricted exclusively in the pericentromeric region (Almeida et al, 2000;Rozek et al, 2004).…”

Section: Introductionmentioning

confidence: 54%

“…The chromosomes of Chrysomelidae also exhibited this pattern (Virkki, 1983;Almeida et al, 2006Almeida et al, , 2009Mello et al, 2014); however, they show a lower amount of heterochromatin compared with other groups, such as Elateridae and Tenebrionidae (Juan & Petitpierre, 1989;Rozek et al, 2004;Schneider et al, 2006).…”

Section: Discussionmentioning

confidence: 99%

“…The simplest technique to visualize the chromosomal distribution of the constitutive heterochromatin is the use of C-banding, which provides data about the location, amount and variations that result from chromosome rearrangements. In Chrysomelidae beetles, differences in the C-band pattern are known from species with similar karyotype features, such as the genus Omophoita (Mello et al, 2014) as well as between individuals of the same species, as observed in one specimen of Diabrotica speciosa (Schneider et al, 2002). Therefore, this specifi c chromosome region has been useful as a cytogenetic marker in Table 1.…”

Section: Methodsmentioning

confidence: 99%

“…constituted a monophyletic group and incorporated these two clades in a single subfamily, the Cassidinae sensu lato. This studies on chromosome evolution (Sumner, 1972(Sumner, , 1992Charlesworth et al, 1994;Mello et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

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Comparative cytogenetic analysis in 13 tortoise beetles (Coleoptera: Chrysomelidae: Cassidinae) from Brazil

Lopes¹,

Fernandes²,

Schneider³

2016

Eur. J. Entomol.

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ISSN (online): 1802-8829http://www.eje.cz fi nding was corroborated by a phylogenetic study using molecular data (Gómez-Zurita et al., 2008).Cytogenetically, only 117 Cassidinae species belonging to 13 tribes have been investigated to date (for revision see De Julio et al., 2010). The tortoise beetles are considered as a group with conserved karyotype, in which approximately 52% of the analyzed species showed 2n = 16 + Xy p , with metacentric and/or submetacentric chromosomes (De Julio et al., 2010). However, cytogenetic records also demonstrated that the diploid numbers can range from 2n = 16 to 2n = 51, as well the sex chromosome systems, which can be either simple -Xy p , X0, Xy, Xy c , Xy r , neoXY, or multiple -Xyy p , X p neoXneoY p , X p neoXneoy p , neoX p neoyy p , neoX p1 neoX p2 neoXneoy p , neoX p1 neoX p2 neoXneoy, X p1 X p2 -neoXneoy (for review see De Julio et al., 2010). These variations in the diploid number and sex chromosome systems are more or less frequent according to the tribe considered. In Cassidini and Mesomphaliini, 44% and 100% Abstract. In the present work, we have characterized the chromosomes of 13 Cassidinae beetles, belonging to four tribes, the broad aim being to increase the cytogenetic data and establish the mechanisms involved in chromosome evolution of this subfamily, which appear to be conserved karyotypically, i.e. 2n = 16 + Xy p . The analysis of mitotic and meiotic cells revealed a high diversity of diploid numbers (2n = 18, 2n = 22, 2n = 26, 2n = 32, 2n = 36, 2n = 40, 2n = 42), and the presence of sex chromosome system of the Xy p type in most species, with the exception of two representatives that exhibited Xy r and XY systems. C-banding showed constitutive heterochromatin predominantly localized in the pericentromeric region of the chromosomes, but differences regarding the number of chromosomes with positive C-bands, intensity of the blocks, and presence of additional bands in autosomes and/or sex chromosomes were observed among the species investigated. Our data revealed that the karyotype 2n = 16 + Xy p does not occur in all 13 tribes of the Cassidinae characterized cytogenetically, seeming to be only a shared feature among the species of the Cassidini. Variations in the C-band pattern, mainly in closely related species, suggest that the interspecifi c karyotype diversifi cation occurred as a result of changes in the quantity and distribution of constitutive heterochromatin. The occurrence of the Xy p sex chromosome system in the tribe Mesomphaliini, which showed the highest diversity of simple and multiple systems among the coleopteran as a whole, reinforces the view that derived systems originated by chromosome rearrangements involving the Xy p ancestral system.

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Section: Introductionsupporting

confidence: 51%

Section: Introductionmentioning

confidence: 54%

Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Comparative cytogenetic analysis in 13 tortoise beetles (Coleoptera: Chrysomelidae: Cassidinae) from Brazil

Lopes¹,

Fernandes²,

Schneider³

2016

Eur. J. Entomol.

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Description of a new species of the genus Alagoasa from southern Brazil (CHRYSOMELIDAE, GALERUCINAE, ALTICINI) based on an integrated taxonomic approach

Ramos,

Begha,

Lima

et al. 2024

Zoologischer Anzeiger

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Comparative Cytogenetics of Omophoita abbreviata and O. aequinoctialis (Coleoptera, Chrysomelidae, Alticini) from the Adolpho Ducke Forest Reserve in Brazilian Amazonia: Intrapopulation Variation in Karyotypes

Goll¹,

Artoni²,

Gross

et al. 2018

Cytogenet Genome Res

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The chromosomes of 2 flea beetle species from central Amazonia, Omophoita abbreviata and O. aequinoctialis (Alticini), were investigated through analysis of meiotic and mitotic cells. These species belong to the subtribe Oedionychina, a taxon that has unique cytogenetic features, such as giant sex chromosomes which are aligned at a distance during meiosis I (asynaptic). O. abbreviata and O. aequinoctialis have a meiotic formula of 10II + X + y, which is predominant in this subtribe. While the species of the genus Omophoita possess a relatively stable karyotype, a typical feature for Oedionychina, the present study identified inter- and intrapopulational variation in chromosome morphology, constitutive heterochromatin, and the presence and number of B chromosomes in O. aequinoctialis. In addition, FISH mapping of telomeric sequences revealed signals in the collochores, raising several questions on the chromosomal evolution in this group.

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Physical map of repetitive DNA and karyotype evolution in three species of the genusOmophoita(Coleoptera: Alticinae)

Cited by 8 publications

References 58 publications

Comparative cytogenetic analysis in 13 tortoise beetles (Coleoptera: Chrysomelidae: Cassidinae) from Brazil

Comparative cytogenetic analysis in 13 tortoise beetles (Coleoptera: Chrysomelidae: Cassidinae) from Brazil

Description of a new species of the genus Alagoasa from southern Brazil (CHRYSOMELIDAE, GALERUCINAE, ALTICINI) based on an integrated taxonomic approach

Comparative Cytogenetics of <b><i>Omophoita abbreviata</i></b> and <b><i>O. aequinoctialis </i></b>(Coleoptera, Chrysomelidae, Alticini) from the Adolpho Ducke Forest Reserve in Brazilian Amazonia: Intrapopulation Variation in Karyotypes

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