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Genomic PCR of white- and yellow-flowered wild species of chrysanthemum with CmCCD4a and CmCCD4b primers: 1, Chrysanthemum boreale; 2, Chrysanthemum indicum; 3, Chrysanthemum makinoi; 4, Chrysanthemum japonese; 5, Chrysanthemum yezoense; 6, Chrysanthemum zawadskii; and 7, Chrysanthemum yoshinaganthum.
