Phenotypic Characterization and Marker-Trait Association Analysis Using SCoT Markers in Chrysanthemum (Chrysanthemum morifolium Ramat.) Germplasm

文献类型： 外文期刊

第一作者： Wang, Fenglan

作者： Wang, Fenglan;Chen, Xiuzhe;Wei, Lisha;Wang, Jun;Wen, Shuang;Wang, Fenglan;Chen, Xiuzhe;Wei, Lisha;Wang, Jun;Wen, Shuang;Huang, Zifeng;Liu, Yang;Zhou, Yiwei

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关键词： chrysanthemum; phenotypic trait; genetic diversity; SCoT; association analysis

期刊名称：GENES （ 影响因子：2.8； 五年影响因子：3.2 ）

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年卷期： 2025 年 16 卷 6 期

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收录情况： SCI

摘要： Background: Chrysanthemum is an economically important ornamental species whose genetic diversity assessment forms the foundation for effective breeding programs. Methods: Phenotypic characterization of 12 traits (7 quantitative and 5 qualitative traits) was conducted alongside SCoT marker analysis to assess genetic diversity and perform marker-trait association analysis in 65 chrysanthemum accessions. Results: Quantitative traits showed 14.81-26.43% variation (peduncle length most variable), while qualitative traits exhibited Shannon-Weiner indices of 0.23-2.28 (flower color most diverse). Phenotypic analyses consistently grouped accessions into two clusters. SCoT markers generated 160 bands (159 polymorphic; 6.957 bands/marker) with high PIC values (0.408-0.896). Molecular analyses also revealed two genetic groups, though with partial discordance to phenotypic clusters. Eight significant marker-trait associations were identified, linking SCoT28/3/30/31/35/20/14/36 to flowering duration, plant height, peduncle diameter, flower color, and pest resistance traits. Conclusions: The study revealed substantial diversity in local chrysanthemum germplasm, with SCoT markers effectively capturing genetic variation. While phenotypic and molecular groupings showed partial mismatch, identified marker-trait associations (e.g., SCoT28 linked to flowering duration) provide practical tools for marker-assisted breeding.

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