ArticleGenome biology2025
Distinct evolutionary trajectories of subgenomic centromeres in polyploid wheat.
Article in Genome biology, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.
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Who cites it
5 citing papers in PubMed.
- Gapless and phased genome assembly reveals post-allopolyploidization subgenomic diversification of tobacco centromeres.Genome biology · 2026Article
- A Genome-Wide Pseudogene Map Reveals the Asymmetric Evolution of the A, B, and D Subgenomes in Common Wheat.Plants (Basel, Switzerland) · 2026Article
- The near-complete genome assembly of allotetraploidHorticulture research · 2026Article
- Review
- Distinct evolutionary trajectories of subgenomic centromeres in polyploid wheat.Genome biology · 2025Article
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8 authors.
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Abstract
backgroundCentromeres are crucial for precise chromosome segregation and maintaining genome stability during cell division. However, their evolutionary dynamics, particularly in polyploid organisms with complex genomic architectures, remain largely enigmatic. Allopolyploid wheat, with its well-defined hierarchical ploidy series and recent polyploidization history, serves as an excellent model to explore centromere evolution.
resultsIn this study, we perform a systematic comparative analysis of centromeres in common wheat and its corresponding ancestral species, utilizing the latest comprehensive reference genome assembly available. Our findings reveal that wheat centromeres predominantly consist of five types of centromeric-specific retrotransposon elements (CRWs), with CRW1 and CRW2 being the most prevalent. We identify distinct evolutionary trajectories in the functional centromeres of each subgenome, characterized by variations in copy number, insertion age, and CRW composition. By utilizing CENH3-ChIP data across various ploidy levels, we uncover a series of CRW invasion events that have shaped the evolution of AA subgenome centromeres. Conversely, the evolutionary process of the DD subgenome centromeres involves their expansion from diploid to hexaploid wheat, facilitating adaptation to a larger genomic context. Integration of complete einkorn centromere assemblies and Aegilops tauschii pan-genomes further revealed subgenome-specific centromere evolutionary trajectories. By inclusion of synthetic hexaploid from S
conclusionsOur study provides a comprehensive landscape of centromere adaptation, evolution, and maturation, along with insights into how retrotransposon invasions drive centromere evolution in polyploid wheat.
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