The invention discloses a grape fruit longitudinal
diameter whole
genome selective breeding method. The method comprises the following steps: acquiring variation site data and
phenotype data of 323 grape samples; 323 samples are divided into a
training set and a
test set, the
training set comprises 259 samples, and the
test set comprises 64 samples; performing whole-
genome association analysis on the
training set samples to find variation points significantly associated with the longitudinal
diameter of the fruit; importing the associated variation points and
phenotype data into five classic regression models, carrying out model training for predicting the size of the longitudinal
diameter of the grape, and screening out an optimal prediction model; and importing a variation site
data set of 64 test sets into the screened optimal prediction model for prediction, and evaluating the accuracy of the model. The invention relates to the technical field of breeding screening. On the basis of 5000 variation sites and a
Ridge regression model, in 64 test samples, the
linear correlation coefficient of a model predicted value and an actual
phenotype value reaches R = 0.96, which indicates that the model can replace the level of manual detection.