Abstract: Abstract:【Objective】The study researched heredity of several flower characters in Dendranthema, that will provide theoretic foundation for breeding of interspecific cross.【Method】Several flower characters of wild diploid species D.lavandulifolium, D. nankingense , D. dichrum, tetraploid D.indicum, D.morifolium (hexaploid and its aueuploid) and their F1 generation were observed and analyzed.【Result】The hybrid’s mean inflorescence diameter, the number of ray florets and tubular florets were 112.4%,108.0%,118.6% of parent’s respectively, and the value of these three characters declined except for the number of tubular florets of F1 generation between wild diploid species when combination from between wild diploid species to between diploids and tetraploids, diploids or tetraploids and polyploid chrysanthemum varieties. 【Conclusion】The inflorescence diameter, number of ray florets and tubular florets appeared heterosis in F1 generation. Polyploid chrysanthemum varieties had stronger flower color genetic ability than diploid and tetraploid. the purple and white color of flowers were stronger than yellow. The heredity of flat plate shape was stronger than 1-3 cycle plate shaped flower. The heredity of double flowers was stronger than 1 cycle flowers.

Key words: Dendranthema, Hybrid , Flower character, Heredity