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1.
Sajjad Mansouri Ali Ashraf Mehrabi Danial Kahrizi 《Journal of Crop Science and Biotechnology》2013,16(3):197-200
A collection of sixty-three accessions of Ae. tauschii belonging to different eco-geographical regions were used to evaluate its genetic diversity by 15 morphological characters. The data recorded were analyzed on all accessions using multivariate analyses. Principal component analysis (PCA) indicated that first six principal components with eigenvalues more than 1 explained 77.2% of the variability amongst accessions. Through cluster analysis according to Euclidian distance and UPGMA method, accessions divided into three groups. Knowledge of genetic diversity in Aegilops species provides different levels of information which is important in the management of germplasm resources. 相似文献
2.
利用EST-SSR标记评价羽扇豆属(Lupinus L.)遗传多样性 总被引：1，自引：0，他引：1
Hong-Yan ZHANG Tao YANG Rong LIU Fang JIN Li-Ke ZHANG Hai-Tian YU Jin-Guo HU Feng YANG Dong WANG Yu-Hua HE Xu-Xiao ZONG 《作物学报》2020,46(3):330-340
利用基于窄叶羽扇豆转录组开发并筛选出的95对多态性EST-SSR标记,对羽扇豆属的22个种133份资源进行全基因组扫描,初步探究羽扇豆属下种间的进化关系,分析来源于"旧世界"羽扇豆种间的遗传多样性,为羽扇豆优异资源的挖掘和创新利用提供理论依据。结果表明,用95对SSR标记共检测出1318个等位变异,每对标记平均检测出3～37个等位变异,平均为13.87个;多态性信息量(PIC)变化范围0.39～0.91,平均为0.75;基因多样性变化范围0.41～0.92,平均为0.78。基于邻接法(NJ)的系统发育初步探究了羽扇豆种间的进化关系,22个羽扇豆种分别来源于"旧世界"和"新世界",与之前研究结果相对一致。聚类分析、群体结构分析和主成分分析结果均表明,来源于"旧世界"的7个羽扇豆种被划分为4个组群,各组群所包含的参试资源没有种间交叉重叠。 相似文献
3.
旨在探索黄瓜种质资源的遗传多样性,为今后黄瓜选育优良品种提供可靠依据。以48份黄瓜种质资源为材料,用DPS软件对各品种的13个表型性状进行聚类分析,同时利用SRAP分子标记对其进行遗传多样性研究。结果表明:根据果实性状等形态学标记聚类分析得出,在阈值75.0处,可以将48份黄瓜种质资源分成5大类群。利用UPGMA法对SRAP分子标记结果聚类分析发现,黄瓜种质间的遗传相似系数在0.52~0.93之间,在遗传相似系数为0.64处,可以将其分成5大类群,形态学标记和SRAP分子标记的聚类结果存在较大差异。由此可见,SRAP分子标记较形态学标记能更好地分析品种间亲缘关系的远近,对黄瓜遗传多样性研究更具指导意义。 相似文献
4.
Forty-four taro (Colocasia esculenta), two tanier (Xanthosoma species) and one Colocasia gigantea accessions were evaluated
for genetic diversity using random amplified polymorphic DNA (RAPD) primers. Seventy-three of 112 primers amplified PCR DNA
products used to fingerprint the accessions. Thirty-two primers were considered highly informative because they amplified
more than 5 bands or amplified one or more polymorphic bands that distinguished between accessions. RAPDs showed high genetic
diversity in taro accessions from Indonesia, were capable in distinguishing between Hawaiian accessions, and could separate
triploid from diploid accessions. UPGMA cluster analysis of genetic similarity estimates (Jaccard's coefficient), separated
the accessions into 3 main groups with C. esculenta divided into 5 subgroups. These primers will be useful for future genetic
analysis and provide taro breeders with a genetic basis for selection of parents for crop improvement. Polymorphic markers
identified in the DNA fingerprinting study will be useful to screen a segregating population which is being generated in our
laboratory aimed at developing a taro genetic linkage map.
This revised version was published online in July 2006 with corrections to the Cover Date. 相似文献
5.
Genetic relationships of sesame germplasm collection as revealed by inter-simple sequence repeats 总被引：11，自引：0，他引：11
D. H. Kim G. Zur Y. Danin-Poleg S. W. Lee K. B. Shim C. W. Kang Y. Kashi 《Plant Breeding》2002,121(3):259-262
Inter‐simple sequence repeats (ISSR) polymorphism was used to determine genetic relationships among 75 Sesamum indicum L. accessions of Korean and exotic sesame. Fourteen reliable ISSR primers were selected for the assessment of genetic diversity, yielding 79 amplification products. Of these polymerase chain reaction products, 33% revealed polymorphism among the 75 accessions. Genetic distances ranged from 0 to 0.255, with a mean genetic distance of 0.0687. The 75 accessions were divided into seven groups on the basis of unweighted pair‐group method with arithmetic averages (UPGMA) cluster analysis. The largest group consisted of 25 Korean cultivars, eight Korean breeding lines and 17 world‐wide accessions. The other groups included 25 accessions, several of which contained useful traits. The dendrogram did not indicate any clear division among sesame accessions based on their geographical origin. However, all Korean sesame cultivars except ‘Namsankkae’ were clustered in the same group, indicating a narrow gene pool. Some of the Korean breeding lines were spread along the dendrogram, showing enlargement of genetic diversity. The genetic diversity data uncovered in this study can be used in future breeding programmes. 相似文献
6.
马铃薯品种遗传多样性分析 总被引：4，自引：0，他引：4
为解析一套(559份)从世界各国收集的马铃薯种质资源的遗传多样性,用16个表型性状和36个SSR标记进行了聚类和多样性参数分析。对454份表型数据完整材料的UPGMA聚类分析表明,在欧氏距离14.66处被聚成2个类群(A_1和A),其中A_1在欧氏距离12.74处被分为A_(11)和A_(12)亚群;454份材料在欧氏距离11.73处被划成9个类群,包括4个小类(A、B、C和H)和5个大类(D、E、F、G和I),其中类群I所包括的材料占总数的57.5%,该结果较好地揭示了马铃薯种质材料之间的形态差异,区分生态类型不同和遗传差异明显的亲本。36个SSR标记在559份材料中共检测出134个多态性位点,每对引物检测1~7个等位变异,平均3.72个,引物多态性信息量(PIC)为0.1545~0.7743,平均为0.5783,说明品种间有丰富的遗传多样性。NJ系统进化树分析表明,559份材料可分为3个大群。类群I为一个混合群,各地区品种均有分布,包括133份马铃薯材料,占总数的23.8%;类群II中欧洲、北美及中国东北和西北地区的材料所占比重较大,数量为187,占33.5%;类群III中北美、南美以及中国东北和西南地区马铃薯材料所占比重较大,包含239份材料,占42.8%。表型性状聚类与SSR分子标记聚类结果相似,均与地理位置有很大相关性,应结合共同用于评价马铃薯品种遗传多样性。 相似文献
7.
云南茶树资源遗传多样性与亲缘关系的ISSR分析 总被引：9，自引：1，他引：8
以8个种群134份云南茶树资源为材料,应用ISSR标记方法,进行了遗传多样性与亲缘关系分析。结果表明,18个多态性ISSR引物对全部试验材料进行PCR扩增,共获得475条稳定的谱带,其中多态性谱带470条(占98.9%),遗传多样性丰富;应用Nei-Li相似系数法估算了134个材料间的相似系数为0.445~0.819,平均为0.512,说明茶树资源间的遗传基础较宽;对134份茶树资源的分子系统聚类分析(UPGMA)将资源分为3大组,聚类结果与地理距离没有明显的相关性;主成分分析(PCA)表明主成分分析的结果与系统聚类基本一致,但是主成分分析更加直观清晰地显示各个材料间的亲缘关系;大厂茶等8个种群间的遗传相似系数于0.850~0.987间,平均为0.92,表明不同种群间的遗传差异较小。 相似文献
8.
瓜尔豆[Cyamopsis tetragonoloba (L.) Taub.]为一年生抗旱耐热豆类植物,是Cyamopsis属中经济性最为重要的一个种。有关商业品种的遗传关系的信息对于瓜尔豆育种至关重要。本文依据6个瓜尔豆,1个C. senegalensis 种和1个 C. serrata种的引种系的RAPD和植物学性状数据采用UPGMA方法 进行了聚类分析。供试的三个种共扩增出29条带,其中26条具有多态性。每个引物扩增出的多态性片段为2至6条,平均3.3条。基于这26条多态性RAPD片段的Jaccard相似系数,聚类分析将这3个种分为2组：第一组包括C. serrata 和 C. senegalensis 2个野生种,第二组包括Cyamopsis tetragonoloba种的6个品种。在第二组中,‘Kinman’与其他5个品种的关系较远。用这8个材料形态性状非相似系数进行的聚类分析获得了类似的结果,但用形态性状比之RAPD检测到组内更多的变异。 相似文献
9.
The use of AFLP markers for cultivar identification in apricot 总被引：4，自引：0，他引：4
Amplified fragment length polymorphism (AFLP) molecular markers were employed for the fingerprinting of 118 accessions of apricot, including cultivated varieties and related apricot species. Five primer combinations were tested and 165 polymorphic bands produced which could uniquely differentiate all accessions under investigation. Primer combinations were rated according to the multiplex ratio, the polymorphic index content and the discrimination power parameters and superior combinations were identified. AFLP markers were used in cluster analysis carried out with the UPGMA and the neighbour‐joining methods and parsimony analysis. Four groups of similar accessions were identified: (i) those from the Mediterranean basin, (ii) from China, (iii) from continental Europe and (iv) mixed Europe‐North America accessions. In the principal component analysis the first three components accounted for 17% of the total variability existing among accessions. Because the most important regions where apricot is cultivated in the world were represented in the analysis, with a large number of varieties, it was possible to discuss the data in the light of current phylogenetic hypotheses on the origin and evolution of the species. 相似文献
10.
Ajay Pratap Singh Samresh Dwivedi Sudhakar Bharti Archana Srivastava Vandana Singh S.P.S. Khanuja 《Euphytica》2004,136(1):11-20
Genetic relationships were examined among thirty germplasm accessions belonging to five Ocimum species using RAPD markers. A very high degree of polymorphism (98.20%) was observed. UPGMA cluster analysis of genetic similarity
indices grouped all the accessions into two major clusters corresponding to previously reported botanical sections. Intra-clustering
within the two clusters precisely grouped the accessions belonging to one species in one sub-cluster as expected from their
genetic background. Our results show that RAPD technique is a sensitive, precise and efficient tool for genomic analysis in
Ocimum species, that may be useful in future studies, by assigning new unclassified germplasm accessions to specific taxonomic groups
and reclassifying previously classified accessions of other Ocimum species by traditional criteria on a more objective basis.
This revised version was published online in August 2006 with corrections to the Cover Date. 相似文献
11.
Nicholas Ninju Denwar Frederick J. Awuku Brian Diers Francisca Addae‐Frimpomaah Godfree Chigeza Richard Oteng‐Frimpong Doris K. Puozaa Michael T. Barnor 《Plant Breeding》2019,138(5):577-587
Soybean [Glycine max (L.) Merrill] is an important oilseed crop worldwide and it has recently become the crop of interest in Ghana. In this study, 142 soybean accessions were genotyped with 34 SSR markers and concurrently evaluated for five quantitative and two qualitative phenotypic traits. Twenty‐nine of the SSR markers were polymorphic with mean allele number of 5.3, polymorphic information content (PIC) of 0.51 and gene diversity of 0.55. Molecular analysis based on unweighted paired group arithmetic mean (UPGMA) clustering and principal coordinate analysis (PCoA) was similar in explaining the extent of diversity within the accessions. Structure analysis placed most of the accessions into two subpopulations with 18 (12.7%) as admixtures. Principal component analysis (PCA) based on phenotypic traits revealed two clusters. Both UPGMA clustering‐based SSR data and PCA from phenotypic data showed similar results. The assembled germplasm is genetically diverse with high variation in flowering and maturity period, and key yield components which could be exploited in developing superior varieties well adapted to Ghana and West Africa. 相似文献
12.
Elham R. S. Soliman Hanaa H. El-Shazly Andreas Brner Abdelfattah Badr 《Breeding Science》2021,71(3):313
The genetic diversity among an international collection of 40 maize accessions has been evaluated using DNA ISSR fingerprinting. Among the 180 ISSR markers scored by 15 primers, 161 markers (89.59%) were polymorphic and 19 were unique in 16 accessions. A cluster tree based on the average distance coefficients and the Dice similarity indices divided the accessions into three major groups, each including clusters of accessions assigned to their subspecies. However, a low level of genetic differentiation among the accessions was demonstrated by the STRUCTURE analysis of ISSR data in agreement with the low gene flow (Nm) value among the accessions. A scatter diagram of the principal component analysis (PCA) based on ISSR data analysis revealed that the accessions were differentiated into three groups comparable to those produced by the cluster analysis, in which some accessions of the same subspecies showed a close similarity to each other. A scatter diagram of the principal coordinate analysis (PCoA) based on the drought tolerance indices (DTIs) showed that nine genetically similar accessions share drought tolerance characteristics; these include four of subsp. indurata, three of subsp. everata, and two of subsp. indentata. An abundance of unique ISSR alleles found in the 16 accessions, including the nine drought-tolerant accessions, represents rich untapped genetic resources and these accessions may be exploited in the future breeding of maize commercial lines. 相似文献
13.
豇豆种质资源SSR标记遗传多样性分析 总被引：8，自引：0，他引：8
从46对备选的豇豆SSR引物中鉴定筛选出扩增带单一、稳定清晰且多态性强的13对引物。用这13对引物,对来自中国、非洲和亚洲其他国家的共316份栽培豇豆[Vigna unguiculata (Linn) Walp.]资源的DNA进行SSR扩增,以研究其遗传多样性。结果共检测到47个等位位点,平均每对引物扩增出3.692个等位位点,有效等位基因平均2.003个;5对SSR引物VM16、VM26、VM20、VM25和VM23,对于检测豇豆遗传变异最为有效。UPGMA聚类图显示,13对SSR引物即能将其中的260份参试资源区分开,其中国内、外资源差异明显,被划为2大类群;国内资源类群又可分为与地理来源的气候生态区明显关联的2个北方组群、4个南方组群和2个混合组群,8个组群间相对独立又相互渗透;国内育种高代材料的遗传多样性狭窄。 相似文献
14.
芹菜AFLP遗传多样性分析 总被引：3，自引：0，他引：3
为了了解分析中国芹菜(Apium gra-veolens L.)栽培品种的亲缘关系,笔者利用AFLP技术对24份芹菜种质资源的遗传多样性进行了分析,从81个引物中筛选出8个AFLP选择性扩增引物,共扩增出395个位点,其中多态性位点245个(59.88%)材料间遗传相似系数变化范围为0.385~0.987,在遗传相似系数为0.6水平上,聚类分析结果可将供试材料分为3类,中国目前栽培的多数芹菜品种的亲缘关系较近,聚类结果与地域来源和形态特征有一定对应关系 相似文献
15.
为揭示湖南省饭豆地方品种的遗传多样性,促进种质资源的有效保护和利用。本研究利用RAPD和ISSR标记分析了源于湖南省各地36份古老饭豆地方品种的遗传多样性,并采用UPGMA方法进行了遗传聚类分析。结果表明：12个RAPD引物和4个ISSR引物在供试材料中共扩增产生81条带型清晰的条带,平均每个引物扩增产生5.06个条带;其中59个为多态性条带,占总扩增条带的72.84%,具有多态性引物的PIC值在0.397~0.968之间;通过UPGMA法进行聚类分析表明供试材料的遗传相似系数在0.605~0.877之间,供试材料被分为4大类,且聚类结果表现明显的地域特征。本研究结果可为本省饭豆种质资源保护和育种研究提供理论依据。 相似文献
16.
六倍体小黑麦种质资源遗传多样性分析 总被引：3，自引：1，他引：2
利用RAPD标记对10份六倍体小黑麦、1份普通小麦和1份黑麦种质资源遗传多样性进行了分析,19个RAPD引物中,有10个引物(52.63%)可扩增出清晰且具多态性的条带。10个引物共产生385条DNA片段,其中384条具有多态性,多态性比率为99.74%,不同引物扩增带数变幅为8~71条,平均为38.5条,扩增产物的片段大小为298~3 054 bp,材料间的遗传距离变化范围在0.724~0.833之间。对12份供试材料的遗传关系进行聚类分析,在平均GD值0.77水平上可将12份供试材料分为3类。研究结果为将六倍体小黑麦的优良基因导入到普通小麦中提供了理论依据。 相似文献
17.
Eight Lathyrus sativus L. accessions from a variety of geographic origins were used to study intraspecific genetic diversity
using RAPD analysis. Fourteen decamer primers produced 64 amplification products, 50% of which were polymorphic between the
samples. Jaccard's coefficient of genetic similarity was calculated between samples and a dendrogram was constructed by an
unweighted pair-group method with arithmetical averages (UPGMA). The dendrogram showed that most of the L. sativus plants
clustered into accessions or common geographical areas. The average genetic similarity coefficient within accessions was 0.12
and between accessions was 0.20, indicating a low level of intraspecific genetic variation. Interspecific genetic diversity
and phylogenetic relationships of eight Lathyrus species, including L. sativus and Pisum sativum L. (field pea) were examined
using 14 decamer primers which produced 283 amplification products. All amplification products were polymorphic across the
nine species. In the dendrogram the Lathyrus species clustered into three distinct groups which correlated with the Sections
Lathyrus, Clymenum and Linearicarpus. This supports traditional taxonomic classifications of the genus Lathyrus which are
based on morphological traits. Of the species from Section Lathyrus, L. gorgoni and L. cicera were the most similar to L.
sativus. The results suggest that a strategy of breeding for producing lines of L. sativus with increased genetic variation
would be effectively achieved through hybrid production between accessions from wide geographic areas particularly the Mediterranean
area and the Indian subcontinent. However, the most effective method would be introgression of germplasm from other species
in Section Lathyrus.
This revised version was published online in July 2006 with corrections to the Cover Date. 相似文献
18.
The RAPD technique was used to identify genetic relationships in 19 accessions, including six species of the genus Chenopodium. A dendrogram was constructed using UPGMA from 399 DNA markers. The molecular data clustered species and accessions into five different groups. Group 1 with three cultivated varieties of C. nuttalliae, Group 2 included eight cultivars and two wild varieties of C. quinoa, Group 3 with C. berlandieri and C. album, Group 4 with two accessions of C. pallidicaule, and Group 5 with 2 accessions of C. ambrosioides. The polymorphic patterns generated by RAPD profiles showed different degrees of genetic relationship among the species studied. A low level of intraspecific variation was found within the accessions of C. quinoa, C. nuttalliae, and C. pallidicaule. The RAPD markers were found to be a useful tool for detecting genetic variation within the genus Chenopodium. 相似文献
19.
应用SRAP与ISSR分析烟草种质资源遗传多样性及遗传演化关系 总被引：3，自引：0，他引：3
应用ISSR与SRAP两种分子标记,研究国内外96份烟草种质的遗传多样性及不同栽培类型种质的遗传演化关系。表明烟属种间具有丰富的遗传多样性,种间的遗传相似性(GS)在0.28~0.58之间,遗传分化系数(Gst)为0.83。普通栽培种品种间遗传多样性水平较低,品种间的遗传相似性在0.61~0.99之间,栽培种内的遗传多样性为烤烟>晒晾烟>白肋烟>香料烟。当相似系数在0.67作切割线时,基于2种标记的96份烟草种质资源的聚类结果为,(1)普通烟草栽培品种材料91份聚在同一大类,而黄花烟、黏烟草、浅波烟草、哥西氏烟草、香甜烟草5个种也分别为单独的个类,同普通烟草栽培种类群完全区别开来;(2)从进化上看,烤烟和晒晾烟间的遗传进化关系最近,香料烟和黄花烟之间的亲缘关系较远;普通烟草栽培种中国内外来源的烟草品种亲缘关系极其相近,遗传分化现象甚微;(3)2种分子标记虽然原理不同,但分析结果趋势相近(r=0.68,P=1.000)。 相似文献
20.
小扁豆种质资源SSR标记遗传多样性及群体结构分析 总被引：3，自引：0，他引：3
从145对SSR引物中筛选到14对多态性引物,对选取国家种质库的440份小扁豆种质资源进行SSR标记遗传多样性分析,共检测出87个等位变异,平均每个SSR位点6.2143个;平均Shannon-Weaver指数(I)为1.1869。16个不同地理来源群体间表现出显著的遗传多样性差异,国外群体的遗传多样性水平(0.9837)远高于国内群体(0.3485)。PCA、UPGMA法聚类分析和Structure群体结构分析结果相互间完全吻合。440份参试材料从遗传结构上可划分为8个组群,揭示国外群体遗传分化大,群体间的亲缘关系较远;国内群体与之相反。研究结果显示,山西、宁夏和甘肃省是我国小扁豆资源遗传多样性最丰富、遗传关系较复杂的地区,应对该区域小扁豆资源进一步搜集、保护和研究。同时,应继续加强小扁豆资源的国外引种与交流,做进一步系统研究和开发利用。 相似文献