ArticleGenetica2013
Ribosomal DNA is active in different B chromosome variants of the grasshopper Eyprepocnemis plorans.
Article in Genetica, 2013. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 16 papers.
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16 citing papers in PubMed, 24 citations in OpenAlex.
- Satellite DNA content of B chromosomes in the characid fish Characidium gomesi supports their origin from sex chromosomes.Molecular genetics and genomics : MGG · 2020Article
- De novo transcriptome sequencing and gene expression profiling with/without B-chromosome plants of Lilium amabile.Genomics & informatics · 2019Article
- Gene expression changes elicited by a parasitic B chromosome in the grasshopper Eyprepocnemis plorans are consistent with its phenotypic effects.Chromosoma · 2019Article
- Review
- Review
- Protein-coding genes in B chromosomes of the grasshopper Eyprepocnemis plorans.Scientific reports · 2017Article
- B chromosomes: from cytogenetics to systems biology.Chromosoma · 2017Review
- B chromosome contains active genes and impacts the transcription of A chromosomes in maize (Zea mays L.).BMC plant biology · 2016Article
- Meiotic behavior and H3K4m distribution in B chromosomes of Characidium gomesi (Characiformes, Crenuchidae).Comparative cytogenetics · 2016Article
- Uncovering the Ancestry of B Chromosomes in Moenkhausia sanctaefilomenae (Teleostei, Characidae).PloS one · 2016Article
- Cytogenetic characterization and B chromosome diversity in direct-developing frogs of the genus Oreobates (Brachycephaloidea, Craugastoridae).Comparative cytogenetics · 2016Article
- B chromosomes showing active ribosomal RNA genes contribute insignificant amounts of rRNA in the grasshopper Eyprepocnemis plorans.Molecular genetics and genomics : MGG · 2014Article
- HP1 knockdown is associated with abnormal condensation of almost all chromatin types in a grasshopper (Eyprepocnemis plorans).Chromosome research : an international journal on the molecular, supramolecular and evolutionary aspects of chromosome biology · 2014Article
- Single origin of sex chromosomes and multiple origins of B chromosomes in fish genus Characidium.PloS one · 2014Article
- Article
- Preferential occupancy of R2 retroelements on the B chromosomes of the grasshopper Eyprepocnemis plorans.PloS one · 2014Article
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Authors and funding
4 authors at 1 institution in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
B chromosomes are considered to be genetically inert elements. However, some of them are able to show nucleolus organizer region (NOR) activity, as detected by both cytological and molecular means. The grasshopper Eyprepocnemis plorans shows a B chromosome polymorphism characterized by the existence of many B variants. One of them, B24, shows NOR activity in about half of B-carrying males in the Torrox population. Molecular data have suggested the recent origin for B chromosomes in this species, and on this basis it would be expected that NOR activity was widespread among the different B variants. Here we test this hypothesis in four different B chromosome variants (B1, B2, B5, and B24) from 11 natural populations of the grasshopper E. plorans covering the south and east of the Iberian Peninsula plus the Balearic Islands. We used two different approaches: (1) the cytological observation of nucleoli attached to the distal region of the B chromosome (where the rDNA is located), and (2) the molecular detection of the rDNA transcripts carrying an adenine insertion characteristic of B chromosome ITS2 sequences. The results showed NOR expression not only for B24 but also for the B1 and B2 variants. However, the level of B-NOR expression in these latter variants, measured by the proportion of cells showing nucleoli attached to the B chromosomes, was much lower than that previously reported for B24. This suggests the possibility that structural or genetic background conditions are enhancing the expressivity of the rDNA in the B24 variant.
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