Proceedings of the National Academy of Sciences of the United States of America · 12 authors, 3 centres
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This study used CENH3-ChIP-seq to map centromere positions across 27 soybean accessions, finding frequent centromere repositioning events where new centromeres form near or independent of native ones, highlighting the dynamic nature of centromere organization.
This comparative genomics and epigenomics study analyzed centromere structure and dynamics in soybean (Glycine max and G. soja). Researchers performed CENH3-ChIP-seq on 27 accessions, including wild soybeans, landraces, and cultivars, to map centromere positions and sequence composition relative to the Zhonghuang 13 (ZH13) reference genome. The central results revealed widespread centromere repositioning, with new centromeres frequently forming near native centromeres or at independent locations. Hybrid crosses demonstrated significant changes in centromere size and position. The study identified major satellite repeats (CentGm91, CentGm92, CentGm413) and suggested that the presence of immature satellite structures may contribute to centromere instability. Implications underscore the role of centromere satellites in maintaining stable positions and the dynamic evolution of centromeres in plant genomes.
