Genetic Diversity and Genome-Wide Association Study of Architectural Traits of Spray Cut Chrysanthemum Varieties

The architecture of spray cut chrysanthemum is crucial for the quality and quantity flower production. However, mechanism underlying plant still needs to be clarified. In this study, we measured nine architecture-related traits 195 varieties during a two-year period. results showed that number upper primary branches, lateral buds branch length widely varied. Additionally, height had significant positive correlation with leaf nodes total buds. Number branches negative diameter, angle length. Plant height, buds, stem diameter were vulnerable environmental impacts. All could divided into five categories according cluster analysis, typical was summarized. Finally, genome-wide association study (GWAS) performed find potential functional genes.