What is it about?
Whole genome duplication (WGD) is a fundamental evolutionary force in plants, driving diversification and offering immense potential for crop improvement. While WGD's molecular effects are well-studied in individual species, the consistency of these responses across diverse lineages remains largely unknown. Here, we integrated multi-omics datasets from established WGD events across 20 plant species, encompassing both experimentally induced and naturally occurring polyploids, to elucidate shared molecular adaptations to genome doubling. Our analysis identified 68 orthologous core WGD-responsive genes, predominantly involved in stress response, hormone signaling, and cellular homeostasis. Interestingly, despite considerable divergence in individual metabolites across species, their enriched pathways consistently converged on osmotic adjustment, redox regulation, and membrane remodeling. This convergent cascade of core transcriptional regulation and metabolic outputs thus defines a foundational adaptive program across diverse species. However, concurrently, extensive transcriptional and metabolic reprogramming exhibited strong species-specificity. Based on this duality, we propose a novel model of core responses and species-specific reprogramming to WGD. This model provides crucial insights into polyploid stabilization and trait diversity, by highlighting an endogenously activated stress-buffering state that is pivotal for WGD establishment. Moreover, the identified core genes offer promising molecular markers for targeted polyploid breeding strategies.
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Why is it important?
WGD is a pivotal evolutionary force with significant potential for crop improvement. While its molecular effects are well-studied in individual species, the cross-species commonality of WGD responses, particularly in distantly related plants, remains largely unknown. Understanding this is crucial for ensuring polyploid stability and advancing breeding strategies.
Perspectives
The 68 cross-species core WGD-responsive genes identified in this study constitute universal molecular signatures of polyploidization. Their consistent differential expression across our diverse multi-species WGD dataset positions them as a reliable tool for assessing polyploidization-associated responses. This enables the development of rapid molecular assays, particularly those based on gene-expression profiling (e.g., microarray or transcriptome analysis), which can complement traditional morphological observations and facilitate detection of ploidy transitions. When integrated with methods such as flow cytometry, chromosome counting, or genome-wide ploidy determination, these assays could enhance selection and material evaluation in polyploid breeding. For widespread application and full validation, future research should systematically evaluate these core genes across diverse species, ploidy combinations, and developmental stages within a unified experimental framework.
Dr. Kanglu Zhao
Zhejiang A and F University
Read the Original
This page is a summary of: A Model for Core Responses and Species-Specific Reprogramming to Whole-Genome Duplication in Plants, Life, September 2026, MDPI AG,
DOI: 10.3390/life16101643.
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