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1.
鹅膏菌属真菌RAPD分析及亲缘关系的研究   总被引:14,自引:0,他引:14  
本文对采自湖南莽山的26种鹅膏菌属(Amanita)真菌进行了随机扩增多态性DNA(RAPD)分析,40个随机引物中筛选出扩增效果较好的6个引物,每个引物能产生1~10条DNA条带,获得的RAPD谱带清晰并呈现多态性OPG15、OPH04两个引物扩增的RAPD谱带能将26种鹅膏菌完全区分开来,通过6个引物的RAPD分析获得的平均相似性系数表明种与种之间的相关系数在20-60%之间,平均链锁聚类分析  相似文献   

2.
本文对采自湖南莽山的26种鹅膏菌属(Amanita)真菌进行了随机扩增多态性DNA(RAPD)分析,40个随机引物中筛选出扩增效果较好的6个引物,每个引物能产生1~10条DNA条带,获得的RAPD谱带清晰并呈现多态性OPG15、OPH04两个引物扩增的RAPD谱带能将26种鹅膏菌完全区分开来,通过6个引物的RAPD分析获得的平均相似性系数表明种与种之间的相关系数在20-60%之间,平均链锁聚类分析可将26种鹅膏菌分为二大类,且一些具菌环和苞状菌托的种类聚在一起,与形态分类基本相吻合。  相似文献   

3.
小麦抗白粉病基因Pm6的RAPD标记   总被引:15,自引:3,他引:12  
从提莫菲维小麦转移到普通小麦中的小麦白粉病抗性基因Pm6是小麦白粉病(Erysiphe hraminis f sp.tritici)的有效抗性基因。用700个随机引物对Pm6近等基因系进行RAPD分析,发现引物OPV20可在抗病近等基因系中产生大小为2kb的稳定的多态片段。用该引物检测10个其他携Pm6的渐渗系材料,均可稳定扩增出该2kb的多态片段。理一步用OPV20对Pm6F2(IGV1-463  相似文献   

4.
三尖杉科植物RAPD分析及其系统学意义   总被引:6,自引:1,他引:5  
利用随机扩增多态性DNA(RAPD)技术分析了三尖杉科植物三尖杉Cephalotaxus fortunei Hook.f.、粗榧Cephalotaxus sinensisLi、海南粗榧Cephalotaxus hainanensisLi和篦子三尖极Cephalotaxus oliveriMast。,经筛选Operon公司的4组80个引物,其中114个引物的谱带清晰呈多态性。采用UPGMA法对各样本  相似文献   

5.
李传友  伏健民 《遗传学报》1999,26(5):558-562
85EA是通过电子束辐照获得的胞质突变型小麦不育要用RFLP和RAPD技术对85EA及春保持系的线粒体DNA进行了比较研究。RFLP分析表明85EA线粒体基因组中coxⅡ基因的位置结构与保持系发生了变化;RAPD分析中引物OPD-15扩增产物在不育系和保持系间有明显差异,不育系的扩增产物比保持系多1条分子量为0.6kb的特展览 要带,用T-easy vector克隆该不育系特异条带并命名为OPD-  相似文献   

6.
滇西北地区冬虫夏草和阔孢虫草的遗传分化研究   总被引:12,自引:2,他引:10  
张云武  沈发荣 《菌物系统》1999,18(2):176-183
应用随机扩增多态性DNA(RAPD)技术对来自云南西北部高黎贡山和丽江玉龙雪山的6个冬虫夏草Cordyceps sinensis(Berk.)Sacc.,来自德钦地区三个地方的8个阔孢虫草C.crassispora Zang,Yang et Li以及来自云南昆明的一个蛹虫草C.militaris (Vuill)Fr.进行分析。18个随机引物获得的RAPD谱带清晰并呈现多态。遗传距离分析表明,冬虫夏  相似文献   

7.
山羊草属五个基本基因组系统发育的RAPD分析   总被引:8,自引:3,他引:5  
利用RAPD技术,从OPE、OPF、OPG、OPU、OPX、OPY和OPZ共7组随机引物中筛选出28个能产生基因组特异带的稳定引物,对山羊草属(AegilopsL.)的5个基本基因组及普通小麦“中国春”的DNA进行随机扩增,根据扩增的488条DNA片段绘制出系统发育图。普通小麦ABD基因组与S基因组亲缘关系最近,C与U基因组具有比较近的亲缘关系,D基因组与其它基因组的亲缘关系比较远  相似文献   

8.
采用随机扩增多态DNA(RAPD)标记分析了15个丁香品种的DNA扩增产物。研究选用了16个随机引物,共扩增出96条带,其中55条带为可重复性条带,有价值条带大小多在517bp至1636bp之间。这些标记足以区分这些丁香品种。欧丁香(Syringavulgaris)与S.×hyacinthiflora间的相似系数为61.5%,欧丁香与S.×prestoniae间的相似系数为47.2%,S.×hyacinthiflora与S.×prestoniae间的相似系数为43.6%。结果表明,欧丁香与S.×hyacinthiflora亲缘关系最近。应用RAPD资料分析讨论了一些品种的起源。RAPD技术为丁香品种分类鉴定提供了可靠方法。  相似文献   

9.
RAPD分析氮离子注入甜菊种子后的幼苗基因组DNA变异   总被引:19,自引:2,他引:17  
应用RAPD 技术检测经低能氮离子注入甜菊纯系种子引起的幼苗基因组DNA 变异。筛选出OPJ系列中的15 种引物对实验及对照基因组DNA 进行了PCR 扩增,共获扩增片段103 条,分子量在0.3 - 3kb 之间,其中5 种引物OPJ- 1 ,7 ,9,11 ,12 扩增出差异片段12 条。结果表明,低能氮离子注入甜菊种子可引起体内基因组DNA 发生突变;RAPD 技术是检测基因组DNA 发生诱变的一种简便、有效方法。本文同时探讨了离子强度和Tag DNA 聚合酶用量对甜菊RAPD 分析结果的影响,以及氮离子注入诱变效应的可能机制。  相似文献   

10.
随机扩增多态性对白色念珠菌分型的估价   总被引:8,自引:0,他引:8  
李冬梅  朱衡 《真菌学报》1995,14(2):123-129
利用随机扩增多态性(RAPD-PCR)的方法对48株白念珠菌Candida albicans Berkh进行了分析。由初步试验中,随机选用了18种引物?筛选出OPA-14引物,该引物扩增的带型清晰可辨,不同菌株之间扩增的带数6-12条不等,共有6条主带。扩增片段的长度粗略估计在300-2000bp左右。除个别菌株的带型相同以外,大多数菌株之间呈多态性分布,其带型数目和扩增的片段存在差异。对简单的D  相似文献   

11.
利用RAPD研究桂林桂花品种间的亲缘关系   总被引:5,自引:0,他引:5  
伊艳杰  黄莹  尚富德 《广西植物》2005,25(2):129-133,178
采用随机扩增多态性DNA(RAPD)技术,从100个随机引物中筛选出扩增效果较好的20个引物,分 析桂林市23个桂花品种的基因组多态性。20个随机引物共检测到193个位点,其中多态位点114个,占 59.1%。并进行了聚类分析,构建出树状聚类图,将这些品种划分为4个品种群,与传统分类学结果一致。结 果表明,以基因型而不是以表现型为基础,分析桂花品种间的区别是可能的。该技术为解决桂林市的桂花品 种分类问题提供了重要依据。  相似文献   

12.
Iranian Bactrian camel population is less than 100 animals. Iranian biological resource center produced more than 50 Bactrian camel fibroblast cell lines as a somatic cell bank for conservation animal genetic resources. We compared two type markers performance, including 14 random amplified polymorphic DNA (RAPDs) (dominant) and eight microsatellite (co-dominant) for cell line identification, individual identification and investigation genetic structure of these samples. Based on clarity, polymorphism, and repeatability, four RAPD primers were selected for future analysis. Four RAPD primers and eight microsatellite markers have generated a total of 21 fragments and 45 alleles, respectively. RAPD primers revealed fragment size between 150 to 2000 bp and gene diversity since 0.27 (IBRD) to 0.46 (GC10), with an average of 0.37. Microsatellite markers generated number of alleles per locus ranged from 3 to 11, with an average of 5.62 alleles. The observed heterozygosity ranged from 0.359 (IBRC02) to 0.978 (YWLL08), and expected heterozygosity ranged from 0.449 (IBRC02) to 0.879 (YWLL08). Bottleneck analysis and curve showed that Bactrian camel population did not experience a low diversity. RAPD profiles were especially suitable for investigation population genetics. All primers generated novel and polymorphic fragments. Briefly, our results show that a multiplex PCR based on these markers can still be valuable and suitable for authentication of cell lines, investigating gene diversity and conservation genetic resources in Bactrian camel, while new technologies are continuously developed.  相似文献   

13.
Random amplified polymorphic DNA (RAPD) markers have been used to characterize the genetic diversity among 35 spring wheat cultivars and lines with different levels of Fusarium resistance. The objectives of this study were to determine RAPD-based genetic similarity between accessions and to derive associations between Fusarium head blight (FHB) and RAPD markers. Two bulked DNA from either highly resistant lines or susceptible lines were used to screen polymorphic primers. Out of 160 screened primers, 17 primers generated reproducible and polymorphic fragments. Genetic similarity calculated from the RAPD data ranged from 0.64 to 0.98. A dendrogram was prepared on the basis of a similarity matrix using the UPGMA algorithm, which corresponded well with the results of principal component analysis and separated the 35 genotypes into two groups. Association analysis between RAPD markers and the FHB index detected three RAPD markers, H19(1000), F2(500) and B1(2400), significantly associated with FHB-resistant genotypes. These results suggest that a collection of unrelated genotypes can be used to identify markers linked to an agronomically important quantitative trait like FHB. These markers will be useful for marker-assistant breeding and can be used as candidate markers for further gene mapping and cloning.  相似文献   

14.
Bulked segregant analysis was employed to identify random amplified polymorphic DNA (RAPD) markers linked to the restorer gene (Rfo) used in theOgura radish cytoplasmic male sterility of rapeseed. A total of 138 arbitrary 10-mer oligonucleotide primers were screened on the DNA of three pairs of bulks, each bulk corresponding to homozygous restored and male sterile plants of three segregating populations. Six primers produced repeatable polymorphisms between paired bulks. DNA from individual plants of each bulk was then used as a template for amplification with these six primers. DNA polymorphisms generated by four of these primers were found to be completely linked to the restorer gene with the polymorphic DNA fragments being associated either with the fertility restorer allele or with the sterility maintainer allele. Pairwise cross-hybridization demonstrated that the four polymorphic DNA fragments did not share any homology. Southern hybridization of labelled RAPD fragments on digested genomic DNA from the same three pairs of bulks revealed fragments specific to either the male sterile bulks or to the restored bulks and a few fragments common to all bulks, indicating that the amplified sequences are low copy. The four RAPD fragments that were completely linked to the restorer locus have been cloned and sequenced to develop sequence characterized amplified regions (SCARs). This will facilitate the construction of restorer lines used in breeding programs and is the first step towards map-based cloning of the fertility restorer allele.  相似文献   

15.
The technique of random amplified polymorphic DNA (RAPD) offers a broad range of applications in the investigation of plant genomes. A promising prospect is the use of RAPD products as genetic markers. We have investigated a possible organellar source of fragments in RAPD patterns of total DNA. Two nearly-isogenic lines of cytoplasmic male-sterile and male-fertile sugar beet (Beta vulgaris L.) were subjected to RAPD analysis with six different primers. Total, nuclear, mitochondrial (mt), and chloroplast (cp), DNA from each line were investigated. Reproducible DNA fingerprints could be obtained from both organellar DNAs. Differences in band patterns of mtDNA between cytoplasmic male-sterile and -fertile lines were observed with five out of six primers, whereas different cpDNA patterns were generated by one of the primers. Consequently, the RAPD technique can be used to discriminate between different cytoplasms. Clear evidence is provided for the organellar origin of fragments in genomic (total DNA) RAPD patterns. The consequences of these results for the interpretation of RAPD analyses are discussed.  相似文献   

16.
RAPD markers were generated from 6 groups of Tibetan hulless barley (23 varieties): Lasagoumang, QB, Zangqing, Guoluo, Dongqing, and Hymalayia. Of the 48 fragments generated by 5 selected primers (among 68 primers), 44 appeared to be polymorphic (92%). Cluster analysis was performed (RAPDistance 1.04). The 23 varieties were divided into 2 groups, and the molecular foundation of genetic diversity was explored. In addition, to identify the varieties, one DNA fingerprint was constructed based on 17 bands amplified with S32 and 2 bands with S18. A specific RAPD fragment can be used to select for high and low β-glucan content varieties. Supported by the important program of Ministry of Science and Technology of P.R. China, “The Construction of Key Animal & Plant Resource System of Southwest China”.  相似文献   

17.
应用RAPD技术对吐鲁番地区火焰山及艾丁湖区域分离的15株土壤绿藻(chlorophyta)品系的遗传多样性及其亲缘关系进行探讨。结果表明:从20个随机引物中,筛选出多态性和重复性较好且谱带清晰的引物8个,这8个引物扩增出的DNA片段大多在300~2 000 bp之间,所形成的多态性位点数差距较大,显示该区域土壤绿藻具有较丰富的遗传多样性;15株土壤绿藻扩增共得到74条谱带,71条多态性带,其多态性比率为95.95%;聚类分析显示15株土壤绿藻明显地聚为2大类,与其来源相对应,即隶属于同一亚组或相近亚组的不同种基本归为一类,其种间关系与传统的形态学分类结果相吻合。  相似文献   

18.
Random amplified polymorphic DNA (RAPD) markers were utilized for the identification of Lilium species and inter-specific hybrids. The optimum annealing temperature of the polymerase chain reaction (PCR) for the RAPD assay in Lilium was 54 °C, which is relatively higher than the temperature used for other genera reported by previous researchers. Among 76 primers used to amplify genomic DNA by PCR, 18 primers (24%) generated polymorphic DNA fragments in Lilium species and hybrids. Cultivars were also identified by RAPD markers. Some amplified fragments were unique to species of each section and to hybrids derived from these species; that is, they were the section-specific DNA markers. Sections, Sinomartagon, Leucolirion b, Leucolirion a and Archelirion could be identified by 6 section-specific markers amplified with five primers. Seven inter-section hybrids showed the section-specific bands of both parental sections, indicating that these markers would be useful for identifying the parental sections of inter-section hybrids.  相似文献   

19.
Genetic variation in 30 isolates of Discula umbrinella derived from beech, chestnut, and oak was assessed using randomly amplified polymorphic DNA (RAPD) and restriction fragment length polymorphic markers. Polymerase chain reaction amplifications with 17 primers produced 134 different DNA fragments. Three RAPD fragments were subsequently used for Southern hybridization. By these techniques up to four different individuals could be detected in the same leaf. The presence of several individuals within a single leaf indicates a finely tuned balance between the endophyte and its host. Cluster analysis of all arbitrary primed amplified DNA fragments showed that the isolates could be placed into four groups corresponding to their host origin. The high percentage of private RAPD variants within groups is consistent with low gene flow.  相似文献   

20.
Isolates of Verticillium dahliae were sampled from different olive tree orchards in Morocco. These olive trees were located in different commercial culture locations in southern, central and northern Morocco. The isolates were characterized using genetic markers obtained after their DNA PCR amplification with random amplified polymorphic DNA (RAPD) primers. Among the 40 primers tested, 10 generated a total of 66 polymorphic fragments. Among the 38 isolates of V. dahliae tested, RAPD markers were successful in the characterization of groups based on their geographic origin. With the exception of one specific isolate, no correlation could be established among the isolates, based on the morphological appearance of the colony in culture.  相似文献   

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