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DNA characterization and karyotypic evolution in the bee genus Melipona (Hymenoptera, Meliponini).
TLDR
Outgroup comparison indicates that high levels of heterochromatin represent a derived condition within Melipona, and the pattern of karyotypic evolution setsMelipona in an isolated position within the Meliponini. Expand
Karyotypes and heterochromatin variation (C-bands) in Melipona species (Hymenoptera, Apidae, Meliponinae)
TLDR
The karyotypes of eight bee species of the genus Melipona are described and compared in terms of heterochromatin content and location (C-banding technique) to identify species with high and low heterochROMatin content. Expand
Cytogenetic Characterization of Two Partamona Species (Hymenoptera, Apinae, Meliponini) by Fluorochrome Staining and Localization of 18S rDNA Clusters by FISH
TLDR
Supernumerary pericentromeric heterochromatin and the non-homologous portion of a heteromorphic pair behaved in a similar fashion, indicating that may be originated by fission. Expand
Cytogenetic data of Partamona peckolti ( Hymenoptera, Apidae, Meliponini) by C banding and fluorochrome staining with DA/ CMA3 and DA/ DAPI
TLDR
Heterochromatin was localized in all chromosome pericentromeric regions but some blocks could be visualized on some large chromosomes arms, suggesting that DA-CMA3-positive bands of P. peckolti correspond to nucleolar organizer regions, as previously confirmed for another Partamona species by FISH. Expand
Integration of a B chromosome into the A genome of a wasp, revisited
TLDR
The new results provide a direct report of the invasion process in the Porto Firme population, where B frequency has dramatically increased in only four generations, and the principal B type, the metacentric one, has increased in frequency at the expense of the acrocentric one in several populations. Expand
Cytogenetic characterization of Melipona rufiventris Lepeletier 1836 and Melipona mondury Smith 1863 (Hymenoptera, Apidae) by C banding and fluorochromes staining
TLDR
The stingless bees Melipona rufiventris and M. mondury were analyzed cytogenetically by conventional staining with Giemsa, C-banding and sequentialStaining with the fluorochromes CMA3/DA/DAPI, finding the chromosomes appeared very condensed and presented a high heterochromatic content, making it difficult to localize the centromere and therefore to visualize the chromosomes morphology. Expand
Contribution of Cytogenetics to the Debate on the Paraphyly of Pachycondyla spp. (Hymenoptera, Formicidae, Ponerinae)
TLDR
The cytogenetic studies reveal the karyotype diversity in the ant genus Pachycondyla and reinforce the hypothesis on the paraphyly of Pachy Condyla. Expand
A RAPD marker associated with B chromosomes in Partamona helleri (Hymenoptera, Apidae)
TLDR
This work shows that P. helleri can carry up to four B chromosomes per individual, and shows that the RAPD technique is useful to detect specific sequences associated with B chromosomes. Expand
Chromosome numbers and C-banding in two wasp species of the genusPolistes (Hymenoptera Polistine, Polistini)
TLDR
A cytogenetic study was performed on 2 waps species of the tribe polistini, including the determination of chromosome number and the detection of thterochromatin by C-banding technique, which revealed a varied distribution in and around the centromere in chromosomes. Expand
Possible Introgression of B Chromosomes between Bee Species (Genus Partamona)
TLDR
The complete association between B chromosome and SCAR presence and the scarce divergence observed for this DNA sequence between the 4 species analyzed suggest the possibility that this B chromosome has recently been transferred between species through several episodes of interspecific hybridization. Expand
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