Meiotic segregation and post-meiotic drive of the Festuca pratensis B chromosome.
B chromosome
CENH3
chromosome drive mechanism
meiosis
nondisjunction
pollen mitosis
Journal
Chromosome research : an international journal on the molecular, supramolecular and evolutionary aspects of chromosome biology
ISSN: 1573-6849
Titre abrégé: Chromosome Res
Pays: Netherlands
ID NLM: 9313452
Informations de publication
Date de publication:
02 09 2023
02 09 2023
Historique:
received:
11
05
2023
accepted:
19
07
2023
revised:
13
07
2023
medline:
5
9
2023
pubmed:
4
9
2023
entrez:
2
9
2023
Statut:
epublish
Résumé
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.
Identifiants
pubmed: 37658970
doi: 10.1007/s10577-023-09728-6
pii: 10.1007/s10577-023-09728-6
pmc: PMC10474989
doi:
Types de publication
Journal Article
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
26Informations de copyright
© 2023. The Author(s).
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