Analysis of Genetic Law of Inflorescence Traits and Floret Color of Anemone-type Chrysanthemum
In this study,two F1 hybrid combinations via crossing white non-anemone-type chrysanthemum(male)with two red anemone-type chrysanthemums(female)were used to determine 11 inflorescence traits.Genetic analysis revealed that flower diameter,ray floret length,ray floret width and number of disc florets were accordant with the 0MG model without major gene control.Disc flower diameter,number of ray florets,disc floret length,disc floret width and the longest lobe length fitted to the 2MG-ADI model controlled by two major genes with add-demonstration-epistatic effect.Major genes for disc floret length and the longest lobe length had a heritability of approximately 70％,indicating high heritability.Correlation analysis revealed significant positive correlation among disc floret length,disc floret width and the longest lobe length.According to the color values(L*,a*,b*)of ray florets,F1 populations were grouped into 5 different colors.The Shannon-Wiener index(H)of the ray florets of two hybrid combinations were 1.12 and 1.23,the colors varied widely.Additionally,we selected 30 anemone-type chrysanthemums with different colors from the parents and F,population and measured the flower color values(L*,a*,b*)of inside epidermis of disc florets and upper epidermis of ray florets.The results suggest a respectively significant positive correlation of L*,a*and b*values between the two.Through examining 10 anemone-type chrysanthemums with 5 different colors,the same pigment as well as similarity on cell morphology and size were observed between inside epidermis of disc florets and upper epidermis of ray florets,as well as outside epidermis of disc florets and lower epidermis of ray florets possess.The results provided a theoretical foundation for the genetic mapping of inflorescence traits and the cultivation of high-quality anemone-type chrysanthemum varieties.
chrysanthemumanemone typeinflorescence traitsgenetic lawfloret color analysis
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