Hybrid seed incompatibility in Capsella is connected to chromatin condensation defects in the endosperm

• DOI: 10.1371/journal.pgen.1009370
• Publication Date: 2021-02-12T18:42:54Z
• Authors: Katarzyna Dziasek; Lauriane Simon; Clément Lafon-Pla...; Benjamin Laenen; Cecilia Wärdig; Juan Santos-González; Tanja Slotte; Claudia Köhler
• Keywords: 580; Chromosome Aberrations; 0301 basic medicine; [SDV]Life Sciences [q-bio]; Centromere; Quantitative Trait Loci; QH426-470; DNA Methylation; Genes, Plant; Chromatin; Endosperm; [SDV] Life Sciences [q-bio]; 03 medical and health sciences; Species Specificity; Gene Expression Regulation, Plant; Heterochromatin; Seeds; Genetics; Hybridization, Genetic; Capsella; Agricultural Science; Research Article

Hybridization of closely related plant species is frequently connected to endosperm arrest and seed failure, for reasons that remain be identified. In this study, we investigated the molecular events accompanying failure in hybrids pair Capsella rubella C. grandiflora. Mapping QTL underlying cause hybrid incompatibility identified three were close pericentromeric regions. We whether there are specific changes heterochromatin associated with interspecific hybridizations found a strong reduction chromatin condensation endosperm, loss CHG CHH methylation random single chromosome. Consistent reduced DNA disproportionate deregulation genes located regions, suggesting allows access transcription factors targets heterochromatic Since also propose relaxation response interspecies hybridization exposes activates loci leading failure.