Evolutionary trends in the chromosome numbers of swarm-founding social wasps

Menezes, Rodolpho S. T.; Carvalho, Antônio F.; Correia, João Paulo Sales Oliveira; Silva, T. S.; Somavilla, Alexandre; Costa, Marco A. Dalla

doi:10.1007/s00040-014-0365-3

Cited by 23 publications

(25 citation statements)

References 39 publications

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“…Chromosomal Robertsonian fusions and fissions seem to have played a significant role in the intense reshuffling of Synoeca karyotypes. Notably, these rearrangements are common evolutionary changes that have been reported for multiples species 94 , and seem to be frequent during the chromosomal evolutionary history of swarm-founding social wasps 91 , 95 . These chromosomal rearrangements can produce karyotype asymmetry, chromosome number change and loss of chromosomal segments, as well as producing occasionally post-zygotic reproductive barriers, limiting gene flow 33 , 34 , 89 .…”

Section: Discussionmentioning

confidence: 60%

The roles of barriers, refugia, and chromosomal clines underlying diversification in Atlantic Forest social wasps

Menezes

Brady

Carvalho

et al. 2017

Sci Rep

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Phylogeographic studies have sought to explain the genetic imprints of historical climatic changes and geographic barriers within the Brazilian Atlantic Forest (AF) biota, and consequently two processes of diversification (refugia and barriers) have been proposed. Additionally, there is evidence that eustatic changes influenced the biogeographic history of the AF. Here we evaluate these contrasting diversification processes using two AF social wasp species – the mid-montane Synoeca cyanea and the lowland Synoeca aff. septentrionalis. We analyzed several sources of data including multilocus DNA sequence, climatic niche models and chromosomal features. We find support for idiosyncratic phylogeographic patterns between these wasps, involving different levels of population structure and genetic diversity, contrary suitable climatic conditions during the last glaciation, and contrasting historical movements along the AF. Our data indicate that neotectonics and refugia played distinct roles in shaping the genetic structure of these wasps. However, we argue that eustatic changes influenced the demographic expansion but not population structure in AF biota. Notably, these wasps exhibited chromosomal clines, involving chromosome number and decreasing of GC content, latitudinally oriented along the AF. Together, these results reinforce the need to consider individual organismal histories and indicate that barriers and refugia are significant factors in understanding AF evolution.

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Section: Discussionmentioning

confidence: 60%

The roles of barriers, refugia, and chromosomal clines underlying diversification in Atlantic Forest social wasps

Menezes

Brady

Carvalho

et al. 2017

Sci Rep

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“…We also contributed with new cytogenetic data on Groups I and II, highlighting the cytogenetic rearrangements that occurred during the chromosome evolution in this major stingless bee genus. Finally, we emphasize the importance of cytogenetic analyses to evidence the chromosomal rearrangements that occurred during the evolution of different species ( Imai et al , 1994 ; Menezes et al , 2014 ). Studies in other species will allow us to better understand the processes that shaped chromatin evolution in Melipona .…”

Section: Discussionmentioning

confidence: 99%

Comparative cytogenetics in three Melipona species (Hymenoptera: Apidae) with two divergent heterochromatic patterns

et al. 2018

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The genus Melipona is subdivided into four subgenera based on morphological characteristics, and two groups based on cytogenetic patterns. The cytogenetic information on this genus is still scarce, therefore, the goal of this study was to characterize Melipona paraensis, Melipona puncticollis, and Melipona seminigra pernigra using the following techniques: C-banding, DAPI/CMA3 fluorochromes, and FISH with an 18S rDNA probe. Melipona paraensis (2n=18) and M. seminigra pernigra (2n=22) were classified as high heterochromatin content species (Group II). Their euchromatin is restricted to the ends of the chromosomes and is CMA3 +; the 18S rDNA probe marked chromosome pair number 4. Melipona puncticollis (2n=18) is a low heterochromatin content species (Group I) with chromosome pair number 1 marked with CMA3 and 18S rDNA. Low heterochromatin content is a putative ancestral karyotype in this genus and high content is not a monophyletic trait (Melikerria presents species with both patterns). Differences concerning the karyotypic characteristics can be observed among Melipona species, revealing cytogenetic rearrangements that occurred during the evolution of this genus. Studies in other species will allow us to better understand the processes that shaped the chromatin evolution in Melipona.

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“…Heteromorphism in size of a particular chromosome pair was found among all metaphases analyzed for homologous chromosomes by mapping 18S rDNA sites. Apparently this is a recurrent characteristic in Meliponini ( Rocha et al 2007 ; Menezes et al 2014 ; Andrade-Souza et al 2018 ), and it is due to the repetitive nature of ribosomal DNAs, that results in errors during duplication of the genetic material or uneven crossing-over followed by deletion of a small part of the chromosome ( Araújo et al 2002 ; Mampumbu 2002 ).…”

Section: Discussionmentioning

confidence: 99%

Chromosomal mapping of repetitive DNA in Melipona seminigra merrillae Cockerell, 1919 (Hymenoptera, Apidae, Meliponini)

Barbosa¹,

Schneider²,

Goll³

et al. 2021

CCG

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Melipona Illiger, 1806 is represented by 74 known species of stingless bees, distributed throughout the Neotropical region. Cytogenetically it is the most studied stingless bee genus of the tribe Meliponini. Member species are divided in two groups based on the volume of heterochromatin. This study aim was to analyze the composition and organization of chromatin of the stingless bee subspecies Melipona seminigra merrillae Cockerell, 1919 using classical and molecular cytogenetic techniques, so contributing to a better understanding of the processes of chromosomal changes within the genus. We confirm that M. seminigra merrillae has a chromosome number of 2n = 22 and n = 11, results that differ from those reported for the genus in the absence of B chromosomes. The heterochromatic pattern revealed a karyotype composed of chromosomes with a high heterochromatin content, which makes it difficult to visualize the centromere. Silver nitrate impregnation (Ag-NOR) showed transcriptionally active sites on the second chromosomal pair. Staining of base-specific fluorophores DAPI-CMA3 indicated a homogeneous distribution of intensely DAPI-stained heterochromatin, while CMA3 markings appeared on those terminal portions of the chromosomes corresponding to euchromatin. Similar to Ag-NOR, fluorescence in situ hybridization (FISH) with 18S ribosomal DNA probe revealed distinct signals on the second pair of chromosomes. Microsatellite mapping (GA)15 showed markings distributed in euchromatic regions, while mapping with (CA)15 showed marking patterns in heterochromatic regions, together with a fully marked chromosome pair. Microsatellite hybridization, both in heterochromatic and euchromatic regions, may be related to the activity of transposable elements. These are capable of forming new microsatellites that can be dispersed and amplified in different regions of the genome, demonstrating that repetitive sequences can evolve rapidly, thus resulting in within-genus diversification.

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Evolutionary trends in the chromosome numbers of swarm-founding social wasps

Cited by 23 publications

References 39 publications

The roles of barriers, refugia, and chromosomal clines underlying diversification in Atlantic Forest social wasps

The roles of barriers, refugia, and chromosomal clines underlying diversification in Atlantic Forest social wasps

Comparative cytogenetics in three Melipona species (Hymenoptera: Apidae) with two divergent heterochromatic patterns

Chromosomal mapping of repetitive DNA in Melipona seminigra merrillae Cockerell, 1919 (Hymenoptera, Apidae, Meliponini)

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