ISSR Analysis on Genetic Relationship among 29 Oncidium Germplasms
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摘要: 以29份文心兰种质资源为材料, 利用ISSR分子标记开展亲缘关系分析。结果表明:10个ISSR引物共扩增出144条DNA条带, 平均每个引物扩增14.4条, 其中多态性谱带占124条, 多态性比率为86.11%;遗传相似系数为0.340.91, 聚类分析将29份文心兰种质在简单相似系数0.56处分成3大类群。ISSR分子标记聚类结果与传统分类基本一致, 与花器官花色具有密切的关系, 初步证明利用ISSR分子标记技术对文心兰进行亲缘关系分析的可靠性。Abstract: Based on the ISSR molecular markers, agenetic comparison among 29 Oncidium germplasms was established.The 10 ISSR primers produced 144 DNA bands, averaging 14.4DNA bands per primer, and of which124 (86.11%) were polymorphic.The genetic similarity coefficients of the germplasms ranged from 0.34 to 0.91.At the similarity coefficient of 0.56, the 29 germplasm accessions were classified into 3groups.The clustering results were basically consistent with the traditional classification, which is closely correlated to the flower phenotype of germplasm resources.The result obtained from this study seemed to preliminarily validate the application of ISSR molecular markers for genetic analysis on Oncidium.
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Key words:
- Oncidium /
- genetic relationship /
- ISSR
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