Fuente: WIPO "tomato" A method for increasing a soybean seed size is provided. In the method, microRNA396 (miR396) in soybean is edited with Cas12i and gRNA to produce soybean with an improved seed size and yield. The mutant miR396 undergoes a base mutation relative to parental miR396; the parental miR396 is WT miR396 derived from soybean; the miR396 is selected from any one or more of miR396a, miR396b, miR396c, miR396d, miR396f, and miR396i.