ArticleHeredity2026
Chromatin state dynamics of autosomes and the B chromosome during spermatogenesis in Pseudococcus viburni.
Article in Heredity, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers.
What it found
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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.
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Who cites it
3 citing papers in PubMed.
- The mechanistic and evolutionary diversity of programmed DNA elimination.Nature reviews. Genetics · 2026Review
- Comparative genomic analysis and epigenetic profiling of the Drosophila melanogaster B chromosome.Genetics · 2026Article
- B chromosomes put the 'super' in supernumerary.Trends in genetics : TIG · 2026Review
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
2 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
The mealybug Pseudococcus viburni is a plant-feeding insect with a non-Mendelian genetic system known as paternal genome elimination (PGE). In PGE, males eliminate their paternally inherited chromosomes during meiosis, transmitting only the maternal genome to the next generation. This involves genome-wide imprinting, where paternal chromosomes are heterochromatinised in embryogenesis and throughout adulthood. In this species, a non-essential B chromosome can escape paternal genome elimination, thereby enhancing its transmission rate to the next generation. Previous studies show that the B chromosome escapes elimination by changing its chromatin compaction during meiosis to resemble that of maternal chromosomes. Although the exact mechanism underlying this change is poorly understood. Here we investigated histone methylation and acetylation modifications, as well as the Heterochromatin Protein 1 (HP1), to characterise differences between maternal, paternal and B chromosomes during male meiosis of P. viburni. Maternal and paternal chromosomes show distinct histone modification patterns, with marks associated with euchromatin present on maternal chromosomes and marks associated with heterochromatin present on paternal chromosomes. We then identified key histone modification changes that coincide with chromatin remodelling of the B chromosome, which allows it to segregate with maternal chromosomes. In addition, we showed that these chromatin modifications occur regardless of the parental origin of the B chromosome. Overall, our findings support the role of histone modifications for proper chromosome segregation during meiosis in mealybugs and provide insight into the mechanisms by which the B chromosome exploits PGE for its preferential transmission.
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