Genetic analysis and associated SRAP markers for flowering traits of chrysanthemum (<Emphasis Type="Italic">Chrysanthemum morifolium</Emphasis>) |
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Authors: | Fei Zhang Sumei Chen Fadi Chen Weimin Fang Yanming Deng Qingshan Chang Pusheng Liu |
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Institution: | (1) College of Horticulture, Nanjing Agricultural University, Nanjing, 210095, China; |
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Abstract: | The inheritance of two flowering traits of chrysanthemum, initial blooming time and the duration of flowering, was investigated
using segregation within an F
1 population derived from a cross between the autumn-flowering ‘Yuhualuoying’ and the summer-flowering ‘Aoyunhanxiao’ cultivars.
The analysis, based on a single segregating generation and the major gene plus polygene mixed inheritance model, showed that
the inheritance of both traits was compatible with the presence of two pairs of major genes displaying additivity–dominance–epistasis,
with additivity predominating. As the heritability of both pairs of major genes was high (initial blooming time ~65%, duration
of flowering ~72%), it should be possible to select for both traits in early breeding generations. A marker-trait association
analysis based on sequence-related amplified polymorphism (SRAP) genotyping uncovered 10 (initial blooming time) and 12 (duration
of flowering) markers significantly associated with phenotype, cumulatively explaining, respectively, 46 and 54% of the variation.
Some potentially useful markers were identified. |
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Keywords: | |
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