关键词: 菊花, 托桂型, 花器性状, 杂种优势, 主基因 + 多基因, 遗传分析

Abstract: In the present study，inheritance pattern of inflorescence traits of anemone-typed chrysanthemum was dissected by applying the single segregation analysis method of major gene plus polygene mixed inheritance model，based on the two-year phenotypic data in 2012 and 2013 of the segregating F1 population derived from a cross between anemone-typed‘QX-053’and non-anemone-typed‘Nannong Jingyan’. The results suggested that of the 10 investigated inflorescence traits，the heterosis value of mid-parent for the six traits including center flower diameter，ray florets width，number of tubular florets，tubular florets length，longest lobe length and style length，compared with mid-parent value，showed a significant difference degree at 0.01 level. Mixed inheritance model analysis revealed that the seven floral traits，i.e.，flower diameter，center flower diameter，ray florets length，ray florets width，number of tubular florets，tubular florets length and style length were compatible with A-0 model showing no major genes，and therefore might be controlled by polygene subjected to environmental impacts；The other three floral traits including the number of ray florets，tubular florets width，longest lobe length werefitting the B-1 model controlled by two pairs of major genes with additive–dominance–epistatic effect，and the corresponding major gene heritability was 93.85%，42.86% and 52.00%，respectively.

Key words: chrysanthemum, anemone-typed, inflorescence trait, heterosis, major gene plus polygene, genetic analysis