目的研究我国石斛属植物问的亲缘关系。方法从55个ISSR引物中筛选出14个多态性好的引物对石斛属(Dendrobium)植物基因组DNA进行简单重复问序列(ISSR)分析。利用POPGENE32软件计算ISSR扩增产物的Neig基因多样性指数(H)和Shannon信...目的研究我国石斛属植物问的亲缘关系。方法从55个ISSR引物中筛选出14个多态性好的引物对石斛属(Dendrobium)植物基因组DNA进行简单重复问序列(ISSR)分析。利用POPGENE32软件计算ISSR扩增产物的Neig基因多样性指数(H)和Shannon信息指数(I),标记系统的有效等位基因数(effective number of alleles,NE)。应用NTSYS(3.0)软件计算Neig遗传距离和遗传相似系数。按照非加权平均距离法(UPGMA)构建聚类关系图。结果14条引物共扩增出123条带,多态性带112条,约占总数的91.06%,平均每个引物扩增的DNA带数为8.79条。Neig基因多样性指数(H)为0.3519,Shannon信息指数(I)为0.5282,有效等位基因数(NE)为1.5945,种间的相似系数介于0.0909~0.6957,平均为0.3779。结论我国石斛品种的遗传基础比较丰富,ISSR分子标记构建的亲缘关系树状图与经典分类系统基本一致.展开更多
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
LK783 was found to be a good fertility restorer for K-type male sterility of wheat (Triticum aestivum L.). RAPD and ISSR (inter-simple sequence repeat polymorphism) markers were employed to map the major restoring gen...LK783 was found to be a good fertility restorer for K-type male sterility of wheat (Triticum aestivum L.). RAPD and ISSR (inter-simple sequence repeat polymorphism) markers were employed to map the major restoring gene in LK783. Maintainer and restorer DNA pools were established using the extreme sterile and fertile plants among KJ5418A//911289/LK783 F 1 population, respectively. Four hundred and eighteen RAPD primers and 33 ISSR primers were used for screening polymorphisms between the two pools, and amplification bands using a RAPD primer of OPK18 and an ISSR primer of UBC-845 were found polymorphic between the two pools. Linkage analysis showed that OPK18 450 and UBC-845 800 were linked to the restoring gene in LK783. The distance between the restoring gene and OPK18 450 was (15.07±6.28) cM (centiMorgan), with the distance between the restoring gene and UBC-845 800 being (8.20±4.85) cM. The marker of UBC-845 800 was located on chromosome 1BS by amplifying nulli-tetrasomics and 1B ditelosomics of Chinese Spring with the primer of UBC-845, indicating that the restoring gene in LK783 was located on 1BS. The breeding for new fertility restorer lines of K-type cytoplasmic male sterility of wheat would be facilitated by using the two markers.展开更多
采用ISSR分子标记技术对山东、河北地区的24个白桑(Morus alba L.)地方品种资源进行了遗传多态性分析。筛选的13条ISSR引物共扩增86条扩增带,其中多态性条带63条,多态性比率为73.25%,ISSR标记遗传相似系数范围在0.6706~0.952...采用ISSR分子标记技术对山东、河北地区的24个白桑(Morus alba L.)地方品种资源进行了遗传多态性分析。筛选的13条ISSR引物共扩增86条扩增带,其中多态性条带63条,多态性比率为73.25%,ISSR标记遗传相似系数范围在0.6706~0.9529。通过类平均聚类(UPGMA)法分析,24份材料聚分为2大类。展开更多
文摘目的研究我国石斛属植物问的亲缘关系。方法从55个ISSR引物中筛选出14个多态性好的引物对石斛属(Dendrobium)植物基因组DNA进行简单重复问序列(ISSR)分析。利用POPGENE32软件计算ISSR扩增产物的Neig基因多样性指数(H)和Shannon信息指数(I),标记系统的有效等位基因数(effective number of alleles,NE)。应用NTSYS(3.0)软件计算Neig遗传距离和遗传相似系数。按照非加权平均距离法(UPGMA)构建聚类关系图。结果14条引物共扩增出123条带,多态性带112条,约占总数的91.06%,平均每个引物扩增的DNA带数为8.79条。Neig基因多样性指数(H)为0.3519,Shannon信息指数(I)为0.5282,有效等位基因数(NE)为1.5945,种间的相似系数介于0.0909~0.6957,平均为0.3779。结论我国石斛品种的遗传基础比较丰富,ISSR分子标记构建的亲缘关系树状图与经典分类系统基本一致.
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。
文摘LK783 was found to be a good fertility restorer for K-type male sterility of wheat (Triticum aestivum L.). RAPD and ISSR (inter-simple sequence repeat polymorphism) markers were employed to map the major restoring gene in LK783. Maintainer and restorer DNA pools were established using the extreme sterile and fertile plants among KJ5418A//911289/LK783 F 1 population, respectively. Four hundred and eighteen RAPD primers and 33 ISSR primers were used for screening polymorphisms between the two pools, and amplification bands using a RAPD primer of OPK18 and an ISSR primer of UBC-845 were found polymorphic between the two pools. Linkage analysis showed that OPK18 450 and UBC-845 800 were linked to the restoring gene in LK783. The distance between the restoring gene and OPK18 450 was (15.07±6.28) cM (centiMorgan), with the distance between the restoring gene and UBC-845 800 being (8.20±4.85) cM. The marker of UBC-845 800 was located on chromosome 1BS by amplifying nulli-tetrasomics and 1B ditelosomics of Chinese Spring with the primer of UBC-845, indicating that the restoring gene in LK783 was located on 1BS. The breeding for new fertility restorer lines of K-type cytoplasmic male sterility of wheat would be facilitated by using the two markers.
文摘采用ISSR分子标记技术对山东、河北地区的24个白桑(Morus alba L.)地方品种资源进行了遗传多态性分析。筛选的13条ISSR引物共扩增86条扩增带,其中多态性条带63条,多态性比率为73.25%,ISSR标记遗传相似系数范围在0.6706~0.9529。通过类平均聚类(UPGMA)法分析,24份材料聚分为2大类。