Fecha de publicación: 02/09/2021 Fuente: WIPO "processing tomato" PROBLEM TO BE SOLVED: To accurately estimate NLPI of a tomato seedling.SOLUTION: A calyx differentiation estimation section estimates a differentiation period of a first calyx when a tomato seedling is grown under input environmental conditions on the basis of an expression (first model) representing a relationship between the environmental conditions and a differentiation level of the first calyx of the tomato seedling (S14). A leaf differentiation estimation section 32 estimates the number of leaves(NLPI) differentiated under the first calyx by the estimated differentiation period of the first calyx when the tomato seedling is grown under the input environment conditions on the basis of an expression (second model) representing a relationship between the environmental conditions and the differentiation number of leaves in the tomato seedling and the input environmental conditions.SELECTED DRAWING: Figure 4COPYRIGHT: (C)2021,JPO&INPIT