Phenotypic Characterization and Marker-Trait Association Analysis Using SCoT Markers in Chrysanthemum (Chrysanthemum morifolium Ramat.) Germplasm
文献类型： 外文期刊
作者： Wang, Fenglan 1 ; Chen, Xiuzhe 1 ; Huang, Zifeng 3 ; Wei, Lisha 1 ; Wang, Jun 1 ; Wen, Shuang 1 ; Liu, Yang 4 ; Zhou, Yiwei 5 ;
作者机构： 1.Zhongkai Univ Agr & Engn, Coll Hort & Landscape Architecture, Guangzhou 510225, Peoples R China
2.Zhonghua Modern Agr Res Inst, Guangzhou 510800, Peoples R China
3.Dongguan Res Ctr Agr Sci, Dongguan 523086, Peoples R China
4.Shenzhen Polytech Univ, Coll Architectural Engn, Shenzhen 518055, Peoples R China
5.Guangdong Acad Agr Sci, Environm Hort Res Inst, Guangdong Prov Key Lab Ornamental Plant Germplasm, Guangzhou 510640, Peoples R China
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 ）
ISSN：
年卷期： 2025 年 16 卷 6 期
页码：
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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