Studies on the Karyotype of the Ant<i>Pachycondyla harpax</i>(Formicidae: Ponerinae: Ponerini) in Southern Bahia, Brazil

Velasco, Yamid Arley Mera; Delabie, Jacques Hubert Charles; Costa, Marco A. Dalla; Lacau, Sébastien; Mariano, Cléa dos Santos Ferreira

doi:10.1653/024.097.0307

Cited by 6 publications

(4 citation statements)

References 31 publications

(29 reference statements)

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“…Other interesting examples have been observed in Neoponera apicalis (Latreille 1802) and N. verenae Forel, 1922, with extensive variations in chromosome number among populations of the same species (Mariano et al, 2012). Karyotypic populational studies in ants although scarce have brought novelties and important insights in ant evolution (Velasco et al, 2014;Aguiar et al 2017;Micolino et al, 2019a, b;Teixeira et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

Cytogenetics of Strumigenys louisianae Roger, 1863 (Formicidae: Myrmicinae) from North-eastern Amazonia shed light on a difficult species complex

Barros

Chaul

Orivel

et al. 2021

Zoologischer Anzeiger

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Highlights-S. louisianae from the Amazon rainforest showed an intriguing karyotype: 2n=26.-The karyotype of the Amazonian S. louisianae contrasts with an already described one.-Morphological and karyotype variations put to question the limits of the taxon.-Morphology of the Amazonian S. louisianae is similar to the type locality in the USA.-After our findings, we encourage reevaluation of junior synonyms of S. louisianae.

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Section: Introductionmentioning

confidence: 99%

Cytogenetics of Strumigenys louisianae Roger, 1863 (Formicidae: Myrmicinae) from North-eastern Amazonia shed light on a difficult species complex

Barros

Chaul

Orivel

et al. 2021

Zoologischer Anzeiger

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“…The intrachromosomal location of GC-rich 18S rDNA sites is the most common pattern in ants and influences the restriction of rDNA genes to a single chromosome pair, as observed in Atta species (Teixeira et al 2021). Regions with differential staining with DAPI were not detected, as usually observed in different ant groups (Barros et al 2014;Velasco et al 2014;Correia et al 2016;Teixeira et al 2021).…”

Section: Discussionmentioning

confidence: 84%

Karyotype conservation and genomic organization of repetitive sequences in the leaf-cutting ant Atta cephalotes (Linnaeus, 1758) (Formicidae: Myrmicinae)

Teixeira

Barros

Silveira

et al. 2022

Genome

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Leaf-cutting ants are among the New World’s most conspicuous and studied ant species due to their notable ecological and economic role. Cytogenetic studies carried out in Atta show remarkable karyotype conservation among the species. We performed classical cytogenetics and physical mapping of repetitive sequences in the leaf-cutting ant Atta cephalotes, the type species of the genus. Our goal was to test the karyotype conservation in Atta and to start to understand the genomic organization and diversity regarding repetitive sequences in leaf-cutting ants. Atta cephalotes showed 2n=22 (18m+2sm+2st) chromosomes. The heterochromatin followed a centromeric pattern, and the GC-rich regions and 18S rDNA clusters were co-located interstitially in the 4th metacentric pair. These cytogenetic characteristics were observed in other Atta species that had previously been studied, confirming the karyotype conservation in Atta. Evolutionary implications regarding the conservation of the chromosome number in leaf-cutting ants are discussed. Telomeric motif (TTAGG)n was detected in A. cephalotes as observed in other ants. Five out of the 11 microsatellites showed a scattered distribution exclusively on euchromatic areas of the chromosomes. Repetitive sequences mapped on the chromosomes of A. cephalotes are the first insights into genomic organization and diversity in leaf-cutting ants, useful in further comparative studies.

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“…Chromosomes are fundamental parts of genome organization that can be related to interspecific divergences. Morphological and numerical chromosomal traits are relevant to understanding the fundamental aspects of the genomic organization of eukaryotes, and are often key components in comprehending evolutionary pathways and karyotypic differentiation (Imai et al, 1986(Imai et al, , 1988(Imai et al, , 1994(Imai et al, , 2001Hirai et al, 1996;Goodisman et al, 2008;Lorite and Palomeque, 2010;Cardoso et al, 2014;Menezes et al, 2014;Velasco et al, 2014;de Aguiar et al, 2020;Micolino et al, 2020). For instance, chromosomes can differ in size, shape, and genetic information, such as in their number and redundancy.…”

Section: Introductionmentioning

confidence: 99%

Phylogenetic Reconstruction of the Ancestral Chromosome Number of the Genera Anochetus Mayr, 1861 and Odontomachus Latreille, 1804 (Hymenoptera: Formicidae: Ponerinae)

et al. 2022

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Recent phylogenetic and molecular data are changing our knowledge about the relations between species and evolutionary processes resulting in the chromosome variation observed in ants (Hymenoptera: Formicidae). Ants exhibit remarkable variations in morphology, behavior, karyotypes, and chromosome structure. By assembling genetic and chromosome information about the trap-jaw ants from the subfamily Ponerinae, we reconstructed the phylogenetic relationships that inferred the monophyletic condition between the Anochetus and Odontomachus genera and estimated their ancestral haploid chromosome number. According to our inferences, these clades have an ancestral haploid chromosome number n = 15. The most recent common ancestor of Anochetus and Odontomachus has arisen between the Early Paleocene and the Early Eocene periods (time of the most recent common ancestor). In the Anochetus genus, we observed maintenance of the ancestral chromosome number estimated here in most species. This also suggests that pericentric inversions were the primary chromosomal rearrangement modulating the karyotype evolution of this genus. However, a reduction from n = 15–14 is observed in Anochetus emarginatus and Anochetus cf. madaraszi, which likely occurred by centromeric fusion. In contrast, the increase from the ancestral karyotype number in Anochetus horridus suggested centromeric fissions. Odontomachus showed maintenance of the ancestral chromosome number in the “rixosus group” and several gains in all species from the “haematodus group.” Our findings suggest that centromeric fissions and pericentric rearrangements lead to chromosomal changes in trap-jaw ants. Considering the ancestral state estimated here, changes in chromosome morphology are likely due to pericentric inversions, and chromosome number increases are likely due to centric fissions. The higher number of acrocentric or telocentric chromosomes in the karyotypes with n < 15 haploid chromosomes supports such an idea.

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Studies on the Karyotype of the AntPachycondyla harpax(Formicidae: Ponerinae: Ponerini) in Southern Bahia, Brazil

Cited by 6 publications

References 31 publications

Cytogenetics of Strumigenys louisianae Roger, 1863 (Formicidae: Myrmicinae) from North-eastern Amazonia shed light on a difficult species complex

Cytogenetics of Strumigenys louisianae Roger, 1863 (Formicidae: Myrmicinae) from North-eastern Amazonia shed light on a difficult species complex

Karyotype conservation and genomic organization of repetitive sequences in the leaf-cutting ant Atta cephalotes (Linnaeus, 1758) (Formicidae: Myrmicinae)

Phylogenetic Reconstruction of the Ancestral Chromosome Number of the Genera Anochetus Mayr, 1861 and Odontomachus Latreille, 1804 (Hymenoptera: Formicidae: Ponerinae)

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