ArticleChromosome research : an international journal on the molecular, supramolecular and evolutionary aspects of chromosome biology2023
Meiotic segregation and post-meiotic drive of the Festuca pratensis B chromosome.
Article in Chromosome research : an international journal on the molecular, supramolecular and evolutionary aspects of chromosome biology, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers.
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3 citing papers in PubMed.
- B chromosomes put the 'super' in supernumerary.Trends in genetics : TIG · 2026Review
- Dynamic meiotic behavior and evolutionary insights of supernumerary B chromosomes in the hangingflyComparative cytogenetics · 2025Article
- Morphological assessment of oocyte quality during assisted reproductive technology cycle.JBRA assisted reproduction · 2024Review
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7 authors.
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Abstract
In many species, the transmission of B chromosomes (Bs) does not follow the Mendelian laws of equal segregation and independent assortment. This deviation results in transmission rates of Bs higher than 0.5, a process known as "chromosome drive". Here, we studied the behavior of the 103 Mbp-large B chromosome of Festuca pratensis during all meiotic and mitotic stages of microsporogenesis. Mostly, the B chromosome of F. pratensis segregates during meiosis like standard A chromosomes (As). In some cases, the B passes through meiosis in a non-Mendelian segregation leading to their accumulation already in meiosis. However, a true drive of the B happens during the first pollen mitosis, by which the B preferentially migrates to the generative nucleus. During second pollen mitosis, B divides equally between the two sperms. Despite some differences in the frequency of drive between individuals with different numbers of Bs, at least 82% of drive was observed. Flow cytometry-based quantification of B-containing sperm nuclei agrees with the FISH data.
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