CRISPR/Cas9-targeted mutagenesis of the BnaA03.BP gene confers semi-dwarf and compact architecture to rapeseed (Brassica napus L.).

Plant height and branch angle are the key factors of rapeseed plant architecture that affect plant density and lodging, which are crucial for rapeseed yield. In China, ~80% of growing areas are the semi-winter type (Bol-type), with taller plants that are easily affected by lodging and limit mechanical harvesting, especially of hybrids. Breeders have therefore been seeking an 'ideotype' for rapeseed breeding, deeming that semi-dwarf and compact architecture could benefit yield (Fu and Zhou, 2013; Li et al., 2019).