PROBLEM TO BE SOLVED: To provide a trait prediction model creation method for predicting a phenotype of the trait from monobasic polymorphism data, and trait prediction method capable of predicting the trait at a high probability.SOLUTION: The trait prediction model creation method includes the steps of: notating a plurality of monobasic polymorphisms into matrix respectively using monobasic polymorphism data obtained by associating the plurality of monobasic polymorphisms with the trait in a plurality of living individuals; classifying the monobasic polymorphisms into a plurality of categories on the basis of a heritable structure; calculating, for each category, a genome similarity matrix using the matrix notation and the number of monobasic polymorphisms belonging to the categories; and applying the genome similarity matrix and parameters of the heritable structure to a linear mix model.SELECTED DRAWING: None
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