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利用SSR标记技术对12个黄桃品种（系）进行遗传多样性检测.结果发现,SSR标记能够揭示材料间的遗传多样性,从蔷薇科苹果属35对SSR引物中筛选出8对扩增稳定的特异性引物,构建其指纹图谱.8对SSR引物共扩增出78条DNA片段,其中44条具有多态性,多态性比率为54.6％,材料间的遗传相似系数在0.64 ～0.88之间,平均为0.759.通过聚类,从分子水平对黄桃品种（系）的遗传关系进行分析,并对12份黄桃种质材料进行了SSR标记分类,为黄桃种质资源的研究利用提供参考. 相似文献
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在全基因组水平利用分子标记技术,构建甜瓜种质核酸指纹库,建立早期、快速、准确的甜瓜种子纯度、真实性及资源的遗传血缘检测技术.
1 关键技术核心
筛选出用于构建甜瓜核酸指纹库的核心引物是关键技术问题.利用20份具有代表性的甜瓜品种(系)筛选1219对SSR引物,得到多态性的引物470对.综合考虑扩增条带统计难易、多态性信息含量(PIC)、整合遗传连锁图谱(ICUGI,2011,http:∥www.icugi.org/.)等多种因素,最终选择其中18对扩增多态性丰富的引物作为核心引物.经过18对引物扩增后,可以对供试甜瓜品种(系)中的每一份材料建立了一个能区别于其他供试材料的指纹图谱代码. 相似文献
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《北方园艺》2020,(4)
以72个荷花品种为试材,采用荧光标记SSR结合毛细管电泳的方法,研究了不同荷花品种的遗传多样性,并构建了指纹图谱,以期为荷花种质资源的收集和分类鉴定提供依据。结果表明:利用9对SSR荧光引物,通过毛细管电泳技术对72个荷花品种进行检测,共检测到51个多态位点,多态位点数平均为5.67;多态性信息含量PIC值变化范围为0.34～0.76,平均值为0.56。利用其中6对引物CL04、SSR449、SSR412、CL01、CL16和CL10可区分72份供试品种。利用引物扩增带型组合法,构建了72个荷花品种的指纹图谱并进行聚类分析,在遗传相似系数0.535处供试荷花材料可分为三大类群。该研究结果可为荷花种质资源鉴定和分子育种提供参考依据。 相似文献
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利用SSR荧光标记构建92个梨品种指纹图谱 总被引：3，自引：0，他引：3
利用SSR荧光标记技术筛选出的10对SSR荧光标记引物,构建中国建国以后选育的92个梨品种的SSR指纹图谱。10对SSR引物共扩增出132个等位基因,位点的杂合度在0.2421 ~ 0.8632之间。10对引物的扩增带型为8 ~ 44个,平均为29.7个。利用其中5对引物KA16、NH009b、NH013a、CH02b121和CH05d04可区分所有供试品种。92个梨品种10个SSR位点的遗传多样性和多态性信息含量的变化范围分别为0.4886 ~ 0.8810和0.4537 ~ 0.8707,平均值分别为0.7920和0.7732。92个梨品种的SSR指纹图谱互不相同,可以作为各品种特定的图谱,为品种鉴别提供依据。 相似文献
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利用荧光标记SSR构建百合种质资源分子身份证 总被引：6，自引：0，他引：6
以96份百合种质资源为材料,使用SSR标记进行百合种质分子身份证构建试验。从172对百合SSR引物中筛选出20对多态性好的核心引物,采用四重荧光毛细管电泳技术检测扩增条带分子量的方法对百合资源进行标记分析,获得供试样品相应的扩增带型。采用个位数字和小写英文字母对不同带型进行编码,按照20对引物扩增带型数由少到多顺序串联排序的方式构建供试样品的分子身份证。结果显示：20对SSR引物共检测到69个SSR等位位点和170个带型,平均每对引物对品种扩增的等位位点3.45个,带型8.50个。对带型进行编码的结果表明：96份百合种质资源的SSR分子身份证互不相同,可以将材料完全区分开。 相似文献
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利用形态学标记、SSR 分子标记技术对市场上广泛种植的甜瓜品种进行分类鉴定。利用形态学聚类分析，得到60份材料间的相似系数为0.73～0.94，在相似系数为0.74 处，60 份甜瓜材料被分为2 类，为薄皮甜瓜和厚皮甜瓜；在相似系数为0.77 处，薄皮甜瓜按照单果质量、熟性、果皮底色、芳香气分为4 组，实现初步分类。经过SSR 标记聚类分析，得到60 份材料间的相似系数为0.75～0.95，当相似系数为 0.77 时，可以将所有供试材料分为6 类。利用SSR 分子标记技术，为60 份不同甜瓜品种构建唯一的指纹图谱。18 对SSR 引物，每对引物可以检测到4～11 条数目不等的多态性条带，平均为8 条。多态性信息含量（PIC）平均为0.71，变化范围为0.58～0.88。采用QR 编码为60 份甜瓜材料构建了唯一的指纹图谱。试验结果表明形态学标记对60 份材料实现初步分类，SSR 分子标记则能够有效地区别60 份材料，并且为建立甜瓜品种的核酸指纹图谱库提供了理论数据，实现对甜瓜品种进行快速、准确的鉴定。 相似文献
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以取自郑州果树研究所的45个葡萄品种为试材,利用SSR标记技术对其进行了遗传多样性分析.结果表明:利用19对基本核心引物对位于不同染色体上的SSR位点进行PCR扩增,共扩增出76条带,其中包括74条多态性条带.每对引物可检测到等位位点数为2～5个,多态率为66.7％～100％.通过聚类分析结果表明,在遗传距离为0.41处,45份葡萄材料可分为三大类群.对供试葡萄品种的不同引物的扩增产物进行检测,得到了每个品种在一组位于不同染色体的SSR位点上的基因型图谱,从而初步建立一个供试葡萄品种的SSR基因型指纹库.这为利用SSR标记鉴定葡萄品种或品系提供了基础数据. 相似文献
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Eighty-one accessions representing apricot germplasm in Tunisia were collected from different areas of cultivation and fingerprinted using amplified fragment length polymorphism (AFLP) and microsatellites (SSR) markers. A total of 339 polymorphic markers were revealed using 5 AFLP primers combinations and 24 SSR loci. AFLP and SSR markers expressed a high level of polymorphism allowing the distinction of the accessions with an efficiency coefficient of discrimination of 100% for AFLP and 97% for SSR markers. Genetic diversity structure was assessed with AFLPs and SSRs markers separately then with combined matrix data by the help of hierarchical clustering elaborated using Wards method based on Nei and Li (1979) distances. Comparison of the obtained dendrograms revealed a phylogeographic structure into two major groups with significant conservation between the observed subgroups in relation with the geographic origin of the accessions. The relative efficiency of the markers in determining the genetic relationships among apricot accessions has been assessed and a combination of AFLPs and SSRs markers was the most effective. In addition, Mantel test based on genetic distances indicated highly significant correlation between AFLP-SSR data and each of the AFLP and SSR ones, with Pearson correlation values of r = 0.873 and r = 0.692, respectively, revealing the higher efficiency of the combination of both molecular techniques (AFLP and SSR) to estimate the levels of genetic variability among apricot germplasm. 相似文献
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Banana (Musa spp.) is one of the most important crops in the world. In this study, 216 banana accessions, 184 from the National Banana Germplasm Collection of China (NBGCC) and 32 from the International Network for the Improvement of Banana and Plantain (INIBAP), were used to determine the genome composition of banana plants in these collections and to estimate their genetic diversity. The genome composition was examined using PCR-RFLP markers. The molecular data for all but one accession (ITC 1231) from INIBAP were in agreement with the initial records based on phenotypic characteristics. Microsatellite (SSR) markers were used to investigate the genetic variability and relationships among these banana accessions. Ten of the 47 primer pairs tested consistently produced reproducible and discrete fragments. We identified a total of 92 alleles, ranging from 5 to 15 per locus. The genetic similarity between the accessions ranged between 0.1 and 1, when estimated using Jaccard's coefficient. The UPGMA method based on genetic similarities, grouped the NBGCC accessions according to those containing the ‘A’ and ‘B’ genomes. However, this analysis could not separate all the accessions, especially the somatic mutations, using the primers in this study. These data indicated that limited genetic variation exists within these accessions and the collections of NBGCC should include a much wider range of banana plant material. 相似文献
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厚皮甜瓜遗传多样性的SSR分析 总被引：2，自引：0，他引：2
采用61对SSR特异引物对46份厚皮甜瓜材料进行分析,其中52对扩增出条带,47对引物具有多样性,扩增带分子量在150～1500bp,187条谱带中154条谱带具有多态性,多态率占82.35%,平均每个引物可扩增出3.60条带。同时,对材料网纹、果形、单果质量、有无条带、果皮颜色、果肉颜色、肉质、种子、有无麝香味、裂叶、是否自落和花性型等12个性状进行了田间调查,经过phylip软件和NTSYS软件分析后,计算出材料间遗传距离,并做出SSR分子标记和性状2个聚类图。结果显示,46份材料的遗传距离在0.0188～1.2119,而单一性状气味、果皮颜色、果肉颜色和表面网纹的遗传距离都小于0.1,十分接近;2种聚类分析结果存在较大差异,这与供试材料的亲缘关系十分复杂,大部分材料来源相近,具有相同的亲本,和回交亲本存在一定关系。 相似文献
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P. Tantasawat J. Trongchuen T. Prajongjai W. Seehalak Y. Jittayasothorn 《Scientia Horticulturae》2010
Genetic diversity and relatedness of 23 yardlong bean (Vigna unguiculata spp. sesquipedalis) accessions and 7 accessions of a hybrid between cowpea (V. unguiculata spp. unguiculata) and yardlong bean (dwarf yardlong bean) in Thailand were estimated using morphological characters, simple sequence repeat (SSR) and inter-simple sequence repeat (ISSR) markers. In addition, two mungbean (Vignaradiata (L.) Wilczek) and two blackgram (Vigna mungo (L.) Hepper) accessions were also used as outgroup species for molecular analysis. Five morphological characters were diverse among most accessions. However, five groups of 2–3 accessions could not be distinguished from one another based on these morphological characters alone. Unweighted pair-group arithmetic average (UPGMA) analysis of these characters separated these 30 accessions into 2 major groups; the yardlong bean group and the dwarf yardlong bean group. Eleven of the sixteen SSR primers yielded clear SSRs, ten of which were polymorphic (90.91% polymorphism), detecting a total of 54 alleles with an average of 4.91 alleles per locus. These 10 polymorphic SSR markers successfully distinguished 28 yardlong bean and dwarf yardlong bean accessions. The polymorphic information content (PIC) among genotypes varied from 0.251 to 0.752 with an average of 0.597. Among the 16 ISSR primers used, a total of 312 ISSR fragments were amplified for these three Vigna species, revealing the polymorphism percentage of 91.03%. The average ISSR PIC value (0.197) with the range of 0.137–0.276 was lower than that of SSR. Nevertheless, the average marker index of this multilocus marker was 3.495, which was higher than that of SSR (0.669), owing to the differences in the effective multiplex ratio. In addition, Mantel test cophenetic correlation coefficient was higher for ISSR (0.566) than that of SSR (0.198). These results indicated higher efficiency of ISSR for estimating the levels of genetic diversity and relationships among yardlong beans and dwarf yardlong beans in this study. Pair-wise coefficients of SSR- and ISSR-based genetic similarity among all yardlong bean and dwarf yardlong bean accessions averaged 0.87 and 0.91, respectively, suggesting a narrow genetic base that emphasizes the need to broaden genetic diversity to ensure continued breeding success. Clustering of genotypes within groups was not similar when SSR and ISSR derived dendrograms from UPGMA analysis were compared. It appeared that ISSR was the most effective marker system in determining the genetic variability and relationships among yardlong bean and dwarf yardlong bean accessions and differentiating three Vigna species. In addition, ISSR was also most useful for variety identification since all 30 yardlong beans and dwarf yardlong bean accessions can be effectively distinguished by only four ISSR primers with the highest PIC values. 相似文献
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中国加工番茄资源遗传多样性分析 总被引：2，自引：0，他引：2
基于构建的加工番茄核心种质,从3 026份自交系中选择了代表50年育种历程的615份,分别利用16个表型性状和81个(13对SSR、24对In Del、44个SNP)不同类型的多态性分子标记,对其遗传多样性进行了分析。结果表明,无论是基于表型还是基因型数据,供试自交系聚类结果基本一致,均分为两大群。其中表型聚类包括7个亚群,基因型聚类包括6个亚群。综合分析表型和基因型聚类结果,发现大多数早期(2010年以前)育成的自交系聚为一类,近年(2010年以后)育成的自交系不同程度地分布在两类中,说明近年育成的自交系遗传多样性更为丰富。在不同类型标记中,SNP在亚群中呈现更好的多态性,等位基因数、基因多样性、多态性信息量均明显高于SSR和In Del。 相似文献
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La Mantia T Lain T Caruso 《The Journal of Horticultural Science and Biotechnology》2013,88(5):628-632
SummaryTwelve published simple sequence repeat (SSR; microsatellite) markers, belonging to the ssrOeUA-DCA, GAPU and UDO series, were tested in a panel of 46 accessions of olive germplasm belonging to 30 unique cultivars collected in seven Provinces of Sicily. Four well-known reference olive cultivars were also added. The analysis was carried out on an automatic capillary sequencer using fluorescent dyes, and fragment sizes were determined using internal standards. The results allowed us to rank the SSRs assayed according to their information content and reproducibility. Up to 115 alleles were identified (119, if those unique to sport mutations were included), the frequency of which allowed genetic relationships among accessions to be investigated. The probability that two unrelated genotypes displayed the same SSR pattern at all loci examined was calculated to be as low as 1.18 10–11. Sixteen accessions were identified as synonyms. Of these, eight matched perfectly with another accession at all SSR loci examined. The others showed one or two allelic differences from the reference accession. These were interpreted as mutations. Otherwise, all accessions were clearly separated from each other. Two likely parentages were also identified (‘Giarfara’ = ‘Nocellara del Belice’‘Cacaridduni’; and ‘Pizzo di Corvo’ = ‘Nocellara Etnea’ ‘Tonda Iblea’). The genetic diversity of the pool represented by the unique accessions was very high, reflecting the richness of the olive germplasm accumulated in Sicily. A database of the accessions is available to the scientific community (http://www.unipa.it/germolive/ssr.html) to facilitate comparisons of data. 相似文献
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二倍体马铃薯基因组相对简单,借助二倍体进行育种可以加速马铃薯的育种进程,因此评价二倍体马铃薯种质的遗传多样性,挖掘和有效利用优良性状显得非常必要。为了筛选多态性的SSR标记,用55对SSR引物扩增39个遗传关系相对较远的二倍体马铃薯材料。选取分布在12条染色体上的12个具有高多态性的SSR标记评价192份二倍体马铃薯栽培品种的遗传多样性,共检测到98个等位位点,其中97个为多态性位点;每对SSR引物扩增出的等位位点为6~18个,平均8.2个。用非加权配对算术平均法(UPGMA)进行聚类,显示出所有供试材料的遗传关系:12对SSR引物可以将192份材料中的186份区分开;这192份材料被划分为11个组群,其中第一个组群包含了83.3%的材料。 相似文献
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Lili Guo Dalong Guo Wei Zhao 《The Journal of Horticultural Science and Biotechnology》2018,93(4):416-424
Tree peony (Paeonia suffruticosa Andr.), considered by many to be the national flower of China, is famous for its ornamental, medicinal and culinary attributes. In this study, a total of 8,663 Simple Sequence Repeats (SSRs) were detected by means of a microsatellite search of unigene sequences identified from the de novo assembly of sequence data from different genotypes of tree peony from the Zhongyuan group. Among 100 randomly selected SSR markers, 25 were successfully amplified and showed polymorphism in 31 tree peony accessions. The number of polymorphic alleles ranged from 3 to 11 for each locus and the polymorphism information content value (PIC) ranged from 0.58 to 0.85, with a mean of 0.73, indicating a high level of discriminative capability. To analyse the genetic diversity, a phylogenetic tree was constructed, which demonstrated that tree peonies of similar flower colour were clustered together. The large number of tree peony SSR markers identified in this study will be valuable in studies in genetic diversity and linkage map construction, in gene localisation and cloning and in molecular-marker-assisted breeding in tree peony. 相似文献
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野生毛花猕猴桃果实表型性状及SSR遗传多样性分析 总被引：2，自引：0，他引：2
以江西省武功山境内的70份野生毛花猕猴桃种质资源为试材,对其果实表型性状、SSR遗传多样性及其亲缘关系进行分析和评价。根据UPOV（国际植物新品种保护联盟）公布的猕猴桃属品种测定标准对供试材料的果实表型性状进行观测。参照猕猴桃遗传连锁图谱,选用分布于中华猕猴桃基因组中的70对SSR引物对供试材料进行多态性分析。结果表明,在70对引物中,21对引物成功扩增出多态性片段。随机采集的70份野生毛花猕猴桃种质资源中,其果实表型性状和DNA分子水平均存在丰富的遗传多样性。基于UPGMA聚类分析将供试的野生毛花猕猴桃资源分为果实圆形和椭圆形混合组、果实椭圆形组以及果实圆柱形组。21对多态性高的SSR引物共检测出127个等位变异位点,变异范围在2 ~ 12之间,平均每对SSR引物可检测到6.04个等位位点。遗传相似系数（GS）变异范围为0.5306 ~ 0.9252。GS值在0.65水平上UPGMA聚类分析可将供试的野生毛花猕猴桃种质资源划分成Ⅰ、Ⅱ和 Ⅲ 共3个组,这与果实表型性状分析的结果基本一致。这些遗传变异丰富的种质资源可为猕猴桃育种提供有价值的材料。 相似文献