紫薇是世界著名的夏季观赏花木之一,品种繁多、来源复杂,造成了紫薇品种在分类、鉴定上的困难。为探讨简单重复序列间扩增多态性(ISSR)分子标记方法在紫薇品种分类上的可行性,对引自美国的30个紫薇品种和中国的8个栽培品种进行ISSR亲缘...紫薇是世界著名的夏季观赏花木之一,品种繁多、来源复杂,造成了紫薇品种在分类、鉴定上的困难。为探讨简单重复序列间扩增多态性(ISSR)分子标记方法在紫薇品种分类上的可行性,对引自美国的30个紫薇品种和中国的8个栽培品种进行ISSR亲缘关系分析。10条扩增带型清晰且重复性好的引物共获得81个位点,其中70条呈多态性,多态性百分比(PPB)为86.42%。38个紫薇品种的遗传相似性系数介于0.543 2~0.988 7,平均值为0.788 2。在遗传相似性系数0.736处,聚类结果(unweighted pair group method with arithmetic mean,UPGMA)显示,38个紫薇品种分为3个类群,在0.760处可进一步分为7个亚类群,表明ISSR标记技术能从分子水平上较为准确地体现紫薇品种间的亲缘关系。展开更多
In the research, four shading treatments were set, including the treatments with shading degrees at 0, 40%, 60% and 70%, in order to explore storage rate and seedling growth of annual Phoebe bournei. The results showe...In the research, four shading treatments were set, including the treatments with shading degrees at 0, 40%, 60% and 70%, in order to explore storage rate and seedling growth of annual Phoebe bournei. The results showed that the storage rate is growing upon shading degree. In the research, for example, storage rate reached the peak with the shading degree at 70%, and only 42.2% with shading degree at 0. In addition, seedling height and ground diameter showed extremely significant differences among treatments, and the treatment with shading degree at 60% was the best.展开更多
文摘紫薇是世界著名的夏季观赏花木之一,品种繁多、来源复杂,造成了紫薇品种在分类、鉴定上的困难。为探讨简单重复序列间扩增多态性(ISSR)分子标记方法在紫薇品种分类上的可行性,对引自美国的30个紫薇品种和中国的8个栽培品种进行ISSR亲缘关系分析。10条扩增带型清晰且重复性好的引物共获得81个位点,其中70条呈多态性,多态性百分比(PPB)为86.42%。38个紫薇品种的遗传相似性系数介于0.543 2~0.988 7,平均值为0.788 2。在遗传相似性系数0.736处,聚类结果(unweighted pair group method with arithmetic mean,UPGMA)显示,38个紫薇品种分为3个类群,在0.760处可进一步分为7个亚类群,表明ISSR标记技术能从分子水平上较为准确地体现紫薇品种间的亲缘关系。
基金Supported by Forestry Science and Technology Project of Hunan Province(XLK201406)~~
文摘In the research, four shading treatments were set, including the treatments with shading degrees at 0, 40%, 60% and 70%, in order to explore storage rate and seedling growth of annual Phoebe bournei. The results showed that the storage rate is growing upon shading degree. In the research, for example, storage rate reached the peak with the shading degree at 70%, and only 42.2% with shading degree at 0. In addition, seedling height and ground diameter showed extremely significant differences among treatments, and the treatment with shading degree at 60% was the best.