Evidence map›Paper›PMID 40580324›Full record

ArticlePlant cell reports2025

Chromosome pairing during meiosis in Brassica hybrid allodiploids with evolutionarily related genomes.

Xiaoying Li, Yue Liu, Zhengqing Xie, Baoming Tian, Tanusree Datta, Yuxiang Yuan, Xiaochun Wei, Fang Wei, Gongyao Shi

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Article in Plant cell reports, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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9 authors.

Xiaoying LiHenan International Joint Laboratory of Crop Gene Resources and Improvements, School of Agricultural Sciences, Zhengzhou University, Zhengzhou, 450001, China.
Yue LiuHenan International Joint Laboratory of Crop Gene Resources and Improvements, School of Agricultural Sciences, Zhengzhou University, Zhengzhou, 450001, China.
Zhengqing XieHenan International Joint Laboratory of Crop Gene Resources and Improvements, School of Agricultural Sciences, Zhengzhou University, Zhengzhou, 450001, China.
Baoming TianHenan International Joint Laboratory of Crop Gene Resources and Improvements, School of Agricultural Sciences, Zhengzhou University, Zhengzhou, 450001, China.
Tanusree DattaHenan International Joint Laboratory of Crop Gene Resources and Improvements, School of Agricultural Sciences, Zhengzhou University, Zhengzhou, 450001, China.
Yuxiang YuanInstitute of Vegetables, Henan Academy of Agricultural Sciences, Zhengzhou, 450002, Henan, China.
Xiaochun WeiInstitute of Vegetables, Henan Academy of Agricultural Sciences, Zhengzhou, 450002, Henan, China.
Fang WeiHenan International Joint Laboratory of Crop Gene Resources and Improvements, School of Agricultural Sciences, Zhengzhou University, Zhengzhou, 450001, China. fangwei@zzu.edu.cn.ORCID http://orcid.org/0000-0001-7254-4945
Gongyao ShiHenan International Joint Laboratory of Crop Gene Resources and Improvements, School of Agricultural Sciences, Zhengzhou University, Zhengzhou, 450001, China. shigy@zzu.edu.cn.

Funding

Henan Provincial Department of Science and Technology Research Project No. 333103111114Henan Provincial Natural Science Foundation of China No. 303300410366Henan Provincial Science and Technology Research Project No. 333103111110Zhengzhou Collaborative Innovation Project of Zhengzhou University No. 33XTZX09030
6 · The paper itself

Abstract

key messageVarying rates in chromosome pairing, chromosomal fragmentation and chromosome loss during meiosis, indicates homologous recombination pathway of DNA damage repair was challenged to different degrees in three Brassica hybrid allodiploids. Sequence similarity of combined genomes in plant hybrid species can shape chromosome pairing and synapsis during meiosis, but the extent remains unclear. The present study investigated meiotic chromosomal behaviors in three typical Brassica hybrid allodiploids (AB, AC and BC) as models with the evolutionarily related genomes from B. rapa (AA), B. nigra (BB) and B. oleracea (CC). The results showed that chromosome allosyndesis occurred at the pachytene with the varying rate and led to different frequencies of univalents, bivalents, and multivalents, and finally caused the imbalanced segregation with retard chromosomes in daughter cells during meiosis in allodiploids AB, AC and BC. Notably, allodiploid AC displayed an increased incidence of bivalent formation, chromosome bridges, and chromosomal fragmentation. Conversely, allodiploid BC was prone to chromosome loss, particularly within the C genome, and exhibited the highest frequency of lagging chromosomes, resulting in micronuclei and spindle disarray. Transcriptomic analysis revealed that in allodiploid AC the up-regulated genes were predominantly involved in synapsis (ASY1, RBR1), microtubule assembly (AUG4, AUG5, AUG6), and DNA damage repair (BRCA1, BRCA2, FAS1) pathways. In contrast, genes related to DNA damage repair (PMS1, LIG4, ALT2) were mostly transcription-deficient in allodiploids AB and BC, predisposing these hybrids to extensive DNA damage and chromosome lag. Collectively, these findings underscore the profound impact of genomic combinations with sequence divergence on chromosom pairing during meiosis in plant hybrid species.

Indexed as

BrassicaChromosome PairingGenome, PlantMeiosisChromosomes, PlantDiploidyEvolution, MolecularHybridization, GeneticBrassica allodiploidChromosome pairingHomologous recombinationMeiosisSynapsisTranscriptome

Identifiers

PMID40580324

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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 Socratic graph.