Subfunctionalisation and self-repression of duplicated E1 homologues finetunes soybean flowering and adaptation

Subfunctionalisation and self-repression of duplicated E1 homologues finetunes soybean flowering and adaptation

Blog Article

Abstract Soybean jerome brown jersey is a photoperiod-sensitive staple crop.Its photoperiodic flowering has major consequences for latitudinal adaptation and grain yield.Here, we identify and characterise a flowering locus named Time of flower 4b (Tof4b), which encodes E1-Like b (E1Lb), a homologue of the key soybean floral repressor E1.

Tof4b protein physically associates with the promoters of two FLOWERING LOCUS T (FT) genes to repress their transcription and delay flowering to impart soybean adaptation to high latitudes.Three E1 homologues undergo subfunctionalisation and show differential subcellular localisation.Moreover, they all possess self-repression capability and each suppresses the two homologous counterparts.

Subfunctionalisation and the transcriptional regulation of E1 genes collectively finetune flowering time and high-latitude adaptation in soybean.We propose a model for the functional fate of the three E1 genes after the soybean whole-genome incredibleindiatourtravels.com duplication events, refine the molecular mechanisms underlying high-latitude adaption, and provide a potential molecular-breeding resource.