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Mapping single-locus and epistatic quantitative trait loci for plant architectural traits in chrysanthemum

文献类型： 外文期刊

作者： Zhang, Fei 1 ; Jiang, Jiafu 1 ; Chen, Sumei 1 ; Chen, Fadi 1 ; Fang, Weimin 1 ;

作者机构： 1.Nanjing Agr Univ, Coll Hort, Nanjing 210095, Jiangsu, Peoples R China

2.Zhejiang Acad Agr Sci, Flower Res & Dev Ctr, Hangzhou 311202, Zhejiang, Peoples R China

关键词： Chrysanthemum;Plant architecture;QTL mapping;Epistatic QTL

期刊名称：MOLECULAR BREEDING （ 影响因子：2.589； 五年影响因子：2.75 ）

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收录情况： SCI

摘要： Plant architecture is important for chrysanthemum cultivation and breeding. To determine the genetic basis of plant architectural traits in chrysanthemum, a population of 142 F1 plants derived from a cross between the creeping ground-cover chrysanthemum cultivar Yuhualuoying and the erect potted cultivar Aoyunhanxiao was used to detect quantitative trait loci (QTL) associated with plant height, plant width, inter-node length and flower neck length. The broad-sense heritability h (B) (2) for the four plant architectural traits ranged from 0.33 to 0.83, and transgressive segregation was observed. Single-locus QTL analysis revealed a total of five QTL, accounting for 6.0-16.1% of the phenotypic variation. Additionally, 11 pairs of epistatic QTL were identified, explaining 3.5-14.5% of the phenotypic variations. The majority of the interactions detected occurred between background loci. These results indicate that both additive and epistatic effects contribute to phenotypic variation in the plant architecture of chrysanthemum. It is expected that the identified markers associated with the additive QTL and epistatic QTL detected in this study will be of importance in future breeding programs to develop chrysanthemum cultivars exhibiting desirable plant architecture.

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