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Genetic linkage maps of ‘Nagafu No. 2,’ ‘Qinguan,’ and ‘Golden Delicious’ constructed using 190 flowering genes. The abbreviations for the flowering genes are shown on the left and the mutation indices of ‘Nagafu No. 2,’ ‘Qinguan,’ and ‘Golden Delicious’ are shown on the right. The mutation indices were obtained by SNP numbers in flowering genes at log10 among the three apple varieties. The corresponding values are shown as colors from black (0) to red (3).
