ArticleGenes & genomics2021
Reduced fertility caused by meiotic defects and micronuclei formation during microsporogenesis in xBrassicoraphanus.
Article in Genes & genomics, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 8 papers.
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Who cites it
8 citing papers in PubMed, 13 citations in OpenAlex.
- Structural defects in male meiotic cell division lead to reproductive genome instability and disturbed microsporogenesis in banana (Frontiers in plant science · 2026Article
- Genotoxic and Toxicopathological Responses to Ethylparaben in Plants: Potential Impacts to Crop Yields.Toxics · 2025Article
- Apomixis at high resolution: unravelling diplospory in Asteraceae.Journal of experimental botany · 2025Article
- Identification of male-fertility geneFrontiers in plant science · 2024Article
- Cytological and transcriptomic analyses provide insights into the pollen fertility of synthetic allodiploid Brassica juncea hybrids.Plant cell reports · 2023Article
- Cytogenetic Study and Pollen Viability ofPlants (Basel, Switzerland) · 2023Article
- Admixture of divergent genomes facilitates hybridization across species in the family Brassicaceae.The New phytologist · 2022Article
- Advancement of chromosome science in the genomics era.Genes & genomics · 2021Article
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Authors and funding
10 authors at 2 institutions in 2 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
backgroundHybridization and polyploidization events are important driving forces in plant evolution. Allopolyploids formed between different species can be naturally or artificially created but often suffer from genetic instability and infertility in successive generations. xBrassicoraphanus is an intergeneric allopolyploid obtained from a cross between Brassica rapa and Raphanus sativus, providing a useful resource for genetic and genomic study in hybrid species.
objectiveThe current study aims to understand the cause of hybrid sterility and pollen abnormality in different lines of synthetic xBrassicoraphanus from the cytogenetic perspective.
methodsAlexander staining was used to assess the pollen viability. Cytogenetic analysis was employed to monitor meiotic chromosome behaviors in pollen mother cells (PMCs). Origins of parental chromosomes in xBrassicoraphanus meiocytes were determined by genome in situ hybridization analysis.
resultsThe xBrassicoraphanus lines BB#4 and BB#6 showed high rates of seed abortion and pollen deformation. Abnormal chromosome behaviors were observed in their PMCs, frequently forming univalents and inter-chromosomal bridges during meiosis. A positive correlation also exists between meiotic defects and the formation of micronuclei, which is conceivably responsible for unbalanced gamete production and pollen sterility.
conclusionThese results suggest that unequal segregation of meiotic chromosomes, due in part to non-homologous interactions, is responsible for micronuclei and unbalanced gamete formation, eventually leading to pollen degeneration and inferior fertility in unstable xBrassicoraphanus lines.
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