Cytological Studies in Hymenoptera

Kumbkarni, C. G.

doi:10.1508/cytologia.30.222

Cited by 10 publications

(1 citation statement)

References 4 publications

(6 reference statements)

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“…Lagging chromosomes have been previously observed in unfertilized eggs that are destined for development as haploid males (Kumbkarni 1965), so this may indicate that these eggs were developing arrhenotokously, not thelytokously. We also observed that 3% of imaged eggs appeared to be haploid based on an individual pronucleus moving towards the center of the egg without evidence of central or terminal fusion.…”

Section: Discussionmentioning

confidence: 85%

Cytogenetic basis of thelytoky in Apis mellifera capensis

et al. 2017

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-Haplodiploid insects reproduce both sexually and asexually; haploid males arise from unfertilized eggs, while diploid females arise from fertilized eggs. Some species can also produce female offspring by thelytokous parthenogenesis. For example, queenless workers of the Cape honey bee, Apis mellifera capensis , of South Africa can produce diploid female offspring from unfertilized eggs. Genetic evidence suggests that in A. m. capensis , diploidy is restored in zygotes by the fusion of two maternal pronuclei, the haploid descendants of the two alternate products of meiosis I. Here, we confirm this genetic evidence by direct cytological observation of pronucleus fusion. We also provide a description of how the fusion occurs at 4.5-5 h post oviposition and describe the meiotic events that lead up to and follow the fusion. Finally, we document numerous departures from the typical meiotic patterns, which likely explain some of the anomalous A . m. capensis individuals that have been previously identified genetically.Apis mellifera / thelytoky / central fusion / confocal fluorescence microscopy / haplodiploidy

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Section: Discussionmentioning

confidence: 85%

Cytogenetic basis of thelytoky in Apis mellifera capensis

et al. 2017

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The Bee Chromosome database (Hymenoptera: Apidae)

et al. 2021

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The bee diversity (Apidae) estimative ranges from 18,000 to 20,000 species worldwide. Together, they show an impressive diversity in morphological, ecological, and behavioral traits, and there is still much to be understood about their taxonomy and systematics. Their chromosome count variability and genome biology are also astonishing. To date, around 200 bee species have already been karyotyped, with chromosome numbers varying from n = 3 to n = 28, and nuclear haploid genome sizes are available for approximately 70 species with a variation of 1C = 0.19 pg to 1C = 1.38 pg. The Bee Chromosome database was created (www.bees.ufop.br) to summarize the Apidae cytogenetic knowledge by assembling all the cytogenetic information published on bees. Considering the importance of cytogenetic studies for taxonomy, phylogeny, genetics, systematics, conservation, and evolution, the main goal of this database is to outline the advances in the field of bee cytogenetics over the last century.chromosomal evolution / chromosome number / cytogenetics / karyotypic formula / nuclear genome size

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Genetics of Bees Other than Apis mellifera

Moritz¹

1986

Bee Genetics and Breeding

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Cytological Studies in Hymenoptera

Cited by 10 publications

References 4 publications

Cytogenetic basis of thelytoky in Apis mellifera capensis

Cytogenetic basis of thelytoky in Apis mellifera capensis

The Bee Chromosome database (Hymenoptera: Apidae)

Genetics of Bees Other than Apis mellifera

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