Provided is a method for enhancing yield related traits in plants by modulating expression of a nucleic acid encoding a PtMYB12L polypeptide in a plant. Also provided are plants having modulated expression of a nucleic acid encoding a PtMYB12L polypeptide which plants have enhanced yield related traits compared with control plants. Also provided are PtMYB12L encoding nucleic acids and constructs comprising the same useful in enhancing yield related traits in plants.