ArticleScientific reports2026
An intraspecific origin of B chromosomes in Tetragonisca fiebrigi (Apidae: Meliponini) inferred from cytogenetic and nuclear genome size data.
Article in Scientific reports, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
0 citing papers in PubMed.
No citing paper in PubMed yet.
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
7 authors.
Funding
Abstract
Tetragonisca angustula and Tetragonisca fiebrigi are two stingless bees' species commonly known as "jataí". Cytogenetic data indicates the presence of B chromosomes in T. fiebrigi and absence in T. angustula, constituting a cytotaxonomic character. The present study aimed to investigate karyotypic and genome size differences between T. angustula and T. fiebrigi, focusing on the possible correlation between number of B chromosomes and DNA content variation. 10 colonies of T. angustula and 16 colonies of T. fiebrigi were sampled from different geographical locations. Conventional cytogenetic analyses were performed, and 1 C DNA content was measured by flow cytometry. Both species showed 2n = 34 and similar karyotype, with biarmed chromosomes composed of one euchromatic and one heterochromatic arm. B chromosomes were found only in T. fiebrigi individuals, varying from 1B to 7B in females and from 0B to 5B in males. The mean 1 C value from 45 T. angustula individuals was 1 C = 0.95 ± 0.079 pg, and the mean 1 C value from 53 T. fiebrigi individuals was 1 C = 0.93 ± 0.048 pg. The ANOVA indicated no statistical difference in 1 C value between T. angustula and T. fiebrigi. The fact that there is no increase in T. fiebrigi genome size points to the direction of an intraspecific origin of the B chromosomes in this species.
Indexed as
Identifiers
What OpenQuestion holds
Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.