绿豆种质资源枯萎病抗性鉴定及抗性资源筛选北大核心CSCD

绿豆枯萎病是影响绿豆产量最严重的病害之一。筛选苗期抗性资源,培育抗病品种对枯萎病防治具有重要意义。本研究采用剪根浸根接种法,对来自全国18个省市及国外的215份绿豆核心种质资源和85份绿豆新品系进行了苗期枯萎病抗性鉴定。结果显示,不同地区种质间的枯萎病抗性水平存在差异。国内产区中,东北、华东、华中地区约50%的种质具有枯萎病抗性;华北地区抗枯萎病种质占比40.4%;西北、西南和华南地区种质抗病水平较高;国外材料抗病种质占比40.0%。本研究共筛选出17份高抗(HR)枯萎病种质资源,并利用部分材料建立了枯萎病抗性研究RIL群体;6份高抗高代品系材料,在田间全生育期表现高抗且农艺性状优异。本研究期望为今后抗枯萎病绿豆新品种选育及抗性遗传相关研究提供优异资源和理论依据。     

云南野生茄资源黄萎病苗期人工接种抗性鉴定分析

黄萎病是目前茄子生产中的主要病害之一,广泛收集、鉴定、筛选抗性资源,尤其是从野生近缘种中发掘抗性基因并培育抗病品种,是解决茄子黄萎病危害的优选途径。云南省拥有丰富的野生茄子资源但尚未有效利用。本研究针对云南省茄子主产区收集到的3种黄萎病菌株,通过形态学鉴定和真菌18S r DNA/ITS鉴定,均属于大丽轮枝菌,并通过致病力鉴定,筛选出一株强致病力菌株(QZ-S);应用菌株QZ-S,通过苗期人工接种的方法对45份云南野生茄子资源开展黄萎病抗性鉴定,最终筛选出2份高抗材料(蒜芥茄和喀西茄)、2份抗病材料(水茄和多裂水茄)、6份中抗材料(1份刺天茄和5份红茄);此外,还筛选到了1份黄萎病高感材料239-3-2。本研究筛选出的材料可应用于茄子黄萎病抗病育种,为茄子及其他作物黄萎病抗病育种提供抗源。     

3个烤烟品系对TMV抗性的遗传规律分析

为更好地利用抗TMV烤烟种质资源,提高烤烟抗TMV育种效率,对烤烟品系CV87、FC8、抗88的TMV抗性遗传规律及抗性来源进行了研究。利用抗病烤烟品系CV87、FC8、抗88分别与感病品种云烟87、中烟100配置杂交组合,构建F1、F2群体,并利用TMV-C菌株进行抗性鉴定;同时,设计N基因引物对参试烤烟品种（系）的基因组DNA进行PCR扩增。经抗性鉴定,CV87、FC8、抗88及F1群体对TMV免疫,云烟87、中烟100感TMV,卡方（χ2）检验证明F2群体抗感分离比为3:1,符合显性单基因遗传;PCR结果表明,抗病品系CV87、FC8、抗88基因组内存在N基因序列,感病品种云烟87、中烟100基因组内未发现。本研究表明,CV87、FC8、抗88烤烟品系的TMV抗性来源于N基因。     

小麦种质对茎基腐病抗性评价及优异种质筛选

小麦茎基腐病是由镰孢菌侵染引起的一种世界性土传病害,近年来已严重威胁到我国小麦的安全生产。为筛选具有茎基腐病抗性的小麦种质资源,本研究采用孢子悬浮液浸种法,分别以国外抗病材料Sunco和中国品种陕253为抗病和感病对照,对670份我国小麦品种(系)进行了茎基腐病温室苗期抗性鉴定。结果发现,我国供试品种(系)感病材料(病情指数>30)所占比例达到84%,且包含多个近年来小麦生产中的主推品种,表明我国小麦品种总体抗性水平低是导致茎基腐病近年来发病频率与程度不断增加的重要原因之一。经多轮筛选,发掘获得15份抗病表现稳定、抗性水平与抗病对照Sunco相仿的材料。15份材料平均病情指数在10.9~19.4之间,其株高、抽穗期等农艺性状表现出较为丰富的变异,为我国小麦抗茎基腐病品种选育和抗性遗传研究提供了种质资源。     

黄淮海北部地区大豆育成品种对黄淮海主要SMV流行株系的抗性评价

采用人工接种方法研究了166份黄淮海北部地区近年来生产上种植品种及近期育成品种(系)对SMV的抗性,利用黄淮海地区SMV流行株系SC3、SC6、SC7、SC11以及混合4个株系进行了抗性鉴定,从客观上评价了上述品种(系)的抗性。结果显示:对4个株系均表现抗病(中抗、高抗和免疫)的共82份,占49.4%;其中对3个株系表现高抗或免疫的32份,占19.3%;对4个株系表现高抗或免疫的23份,占13.9%。对混合株系表现抗病的108份,占65.1%。其中表现免疫的45份,占27.1%,表现高抗的29份,占17.5%。对4个株系和混合株系均表现抗病的62份,占37.3%;表现免疫和高抗的14份,占8.4%。近年育成品种对SC3、SC7株系较早期育成品种的抗性显著增强;来自河北、北京、山西的品种抗性较好,病情指数整体较低。鉴定筛选出对接种的4个株系及混合株系均表现免疫的品种冀豆9号和石豆6号,可作为抗病育种的重要抗源。本研究还发现部分品种对接种的4个株系和混合株系表现出抗性差异,表明SMV株系间存在着明显的互作。     

陆地棉抗黄萎病基因的分子标记定位

棉花黄萎病是棉花生长过程中最具破坏力的病害之一,在世界范围内流行.棉花黄萎病已成为棉花生产中的主要障碍.减轻棉花黄萎病损失最为经济、安全、有效的办法就是培育和推广抗病品种.本研究利用抗黄萎病品系60182和感黄萎病品种军棉1号为亲本配制杂交组合,对陆地棉抗黄萎病性状进行遗传分析和抗病基因分子标记定位.用主基因＋多基因混合遗传模型和P1,P2,F1,B1,B2和F2六世代联合分析的方法对病叶比例性状进行遗传分析.结果表明,接种BP2,VD8,T9和三者等浓度混合病菌时,抗病性都受两对加性-显性-上位性主基因控制,陆地棉60182的抗病性在各个分离世代都以主基因遗传为主.运用F2为作图群体构建了一个含139个标记位点,31个连锁群,总长1165cM的分子标记连锁遗传图谱,标记平均距离为8.38cM,覆盖棉花全基因组的25.89%.调查229个F2：3家系各时期平均病级代表F2单株抗病性,结合连锁遗传图谱,复合区间作图检测QTL.结果显示,在60182上,接种BP2时检测到4个QTL位于D7染色体上,4个QTL位于D9染色体上;接种VD8时,有5个QTL位于D7染色体上,9个QTL位于D9染色体上;接种T9时,有4个QTL位于D7染色体上,5个QTL位于D9染色体上;接种混合病菌时,有3个QTL位于D7染色体上,7个QTL位于D9染色体上.60182在不同调查时期对4种黄萎病菌的抗性QTL都集中在D7、D9两条染色体上,形成两个明显的抗病QTL集中区.这一结果与两对主基因的遗传模式相吻合,充分表明陆地棉抗黄萎病品系60182兼具对落叶型,非落叶型黄萎病菌的广谱抗性.同时与陆地棉抗黄萎病QTL连锁的分子标记可加速抗黄萎病基因的应用,为培育稳定高抗黄萎病新材料提供有价值的理论依据.     

大豆品种对花叶病毒病株系SC3的抗性鉴定与农艺性状评价

黄淮和长江中下游地区花叶病毒主要流行株系SC3,对大豆产量有很大的影响,本研究利用室内接种鉴定的方法研究217份大豆资源对SC3的抗性,同时调查田间接种SC3后,SC3对不同抗病品种的农艺性状和品质性状的影响。为大豆抗花叶病毒病抗病品种的生产应用提供数据支持,同时为选育抗病品种提供抗性亲本。2012-2014年连续3年采用人工汁液摩擦法接种SC3,在温室鉴定217份大豆种质的病毒抗性,根据分析结果,随机选取不同抗病类型材料30份,其中抗病品种10份,中感品种10份,高感品种10份,于2013-2014年间在藁城堤上试验站进行田间接种鉴定,研究SC3对不同品种的产量相关性状和品质性状的影响。217份大豆资源SC3的鉴定结果表明:第一类抗病品种,包括免疫品种4份,占1.84%;高抗品种2份,占0.92%;中抗品种35份,占16.13%;第二类中感品种,包括中感品种92份,占42.40%;第三类高感品种,包括感病品种3份,占1.38%;高感品种81份,占37.33%。SC3对不同抗性品种的单株粒重、株高、主茎节数、蛋白和油份影响不同。第一类抗性品种的单株粒重、株高、主茎节数、蛋白和油份含量下降不显著;第二类中感品种的单株粒重、主茎节数、蛋白和油份含量下降不显著,其株高因品种差异表现出不同程度的下降;第三类高感品种的单株粒重、株高、主茎节数、蛋白和油份含量下降显著。研究表明SC3对不同抗性品种的农艺性状和品质性状的影响不同,对同种抗病类型不同品种的农艺性状和品质性状的影响也不同。SC3对抗病品种和中感品种的多数农艺性状和品质性状的影响不显著,这两类品种适合作为育种材料进行抗性育种。     

建国以来我国棉花品种遗传基础的分子标记分析

采用MPD分子标记、遗传距离和聚类分析方法,研究建国以来我国有代表性的166个棉花主栽品种(或品系)的遗传多样性。41个RAPD标记Nei’s遗传距离(GD)与两组不同来源实验数据的表型性状欧氏距离(UD)间相关系数分别为0．6445(n＝1770)和0．7078(n＝7140),表明RAPD可以揭示棉花品种间遗传差异。通过对不同棉种、不同品种类型、不同时期、不同种植区域和不同来源的棉花品种(系)遗传差异的比较,探讨我国棉花品种的遗传基础。各层次上遗传差异的比较表明：在我国主栽棉花品种中,海岛棉品种遗传基础窄于陆地棉品种;我国自育陆地棉品种的遗传基础窄于国外引进品种;杂交陆地棉品种的遗传基础窄于常规品种;上世纪80年代以后陆地棉品种遗传基础窄于70年代品种;长江棉区品种遗传基础窄于黄淮棉区品种,西北内陆棉区品种窄于长江棉区品种。启示我们如何在我国棉花育种的全局和不同层面上把握和制定拓宽棉花育种遗传基础的策略和手段,并为进步深入探讨建国以来我国棉花品种遗传改良规律打下基础。     

棉花与番茄抗棉花黄萎病不依赖于Ve1

黄萎病是我国棉花的主要病害之一,发掘抗病基因和阐明抗病机制是开展棉花抗病分子育种的基础.本研究将目前唯一的植物抗黄萎病主效基因Ve1分别在本氏烟和陆地棉中超量表达,以探讨其在防控棉花黄萎病中的价值.研究发现,Ve1基因在本氏烟中超量表达后并未对番茄大丽轮枝菌2个生理小种和棉花黄萎病菌产生明显抗性.RT-PCR分析表明,Ve1并不能激活烟草抗病相关基因的表达,推测本氏烟中可能不存在完整的Ve1介导的抗黄萎病信号路径.Ve1超量表达的转基因棉花接种棉花黄萎病菌"V991"后表现出与本氏烟类似的结果,同时发现,陆地棉对番茄大丽轮枝菌1号生理小种表现出高抗性.利用番茄抗/感黄萎病近等基因系"Craigella GCR218"/"Craigella GCR26"进一步研究发现,2个番茄材料均对棉花落叶型强致病力黄萎病菌"V991"免疫,这暗示番茄对棉花黄萎病菌的抗性不依赖于Ve1.分子鉴定表明,棉花黄萎病菌与番茄大丽轮枝菌1号和2号生理小种存在明显区别,番茄大丽轮枝菌1号和2号生理小种均属于非落叶型黄萎病菌.本研究中鉴定的棉花黄萎病菌均不含有ave1基因,这可能是在棉花中超量表达Ve1并不能增强其棉花黄萎病菌抗性的直接原因.通过病毒介导的基因沉默,在抑制GbSERK1的表达后能显著削弱海岛棉对黄萎病菌的抗性,证实"海7124"中存在类似于Ve1的下游抗病信号路径.本研究还对棉花类受体蛋白的进化以及Ve1抗病信号路径在棉花抗黄萎病机制研究中的价值进行了探讨.     

棉花枯黄萎病及其抗性鉴定技术

棉花枯黄萎病是我国最主要的棉花病害,种植抗病品种是有效的防治方法。抗病鉴定是棉花抗病育种的关键技术之一。人工病圃鉴定是棉花抗病鉴定的主要方法,相对抗性指数(IR)或相对抗病效果(ER)最适合作为抗病鉴定指标,根据棉花的抗病程度可将棉花的抗病水平分为免疫、高抗、抗病、耐病和感病5级。     

新疆新陆早系列品种系谱分析与育种方向

通过对新疆新陆早系列品种系谱分析认为,近10年育成品种,产量不断提高,熟性有变晚趋势,抗病性逐步增强,抗枯萎病已基本解决,抗黄萎病有待进一步提高,品质得到改良,但品种类型单一,不能满足我区棉花产业化发展长远要求.因此,需要育种工作者通过拓宽遗传资源、创新种质,结合先进育种方法,并加强抗逆性筛选力度等来选育适合不同要求的棉花新品种.     

Genomic divergence in cotton germplasm related to maturity and heterosis

Commercial varieties of upland cotton(Gossypium hirsutum) have undergone extensive breeding for agronomic traits, such as fiber quality, disease resistance,and yield. Cotton breeding programs have widely used Chinese upland cotton source germplasm(CUCSG) with excellent agronomic traits. A better understanding of the genetic diversity and genomic characteristics of these accessions could accelerate the identification of desirable alleles. Here, we analyzed 10,522 high-quality singlenucleotide polymorphisms(SNP) with the CottonSNP63 K microarray in 137 cotton accessions(including 12 hybrids of upland cotton). These data were used to investigate the genetic diversity, population structure,and genomic characteristics of each population and the contribution of these loci to heterosis. Three subgroups were identified, in agreement with their knownpedigrees, geographical distributions, and times since introduction. For each group, we identified lineagespecific genomic divergence regions, which potentially harbor key alleles that determine the characteristics of each group, such as early maturity-related loci. Investigation of the distribution of heterozygous loci, among 12 commercial cotton hybrids, revealed a potential role for these regions in heterosis. Our study provides insight into the population structure of upland cotton germplasm. Furthermore, the overlap between lineagespecific regions and heterozygous loci, in the high-yield hybrids, suggests a role for these regions in cotton heterosis.     

Cotton GhBAK1 Mediates Verticillium Wilt Resistance and Cell Death

Virus-induced gene silencing (VIGS) offers a powerful approach for functional analysis of individual genes by knocking down their expression. We have adopted this approach to dissect gene functions in cotton resistant to Verticillium wilt, one of the most devastating diseases worldwide. We showed here that highly efficient VIGS was obtained in a cotton breeding line (CA4002) with partial resistance to Verticillium wilt, and GhMKK2 and GhVe1 are required for its resistance to Verticillium wilt. Arabidopsis AtBAK1/SERK3, a central regulator in plant disease resistance, belongs to a subfamily of somatic embryogenesis receptor kinases (SERKs) with five members, AtSERK1 to AtSERK5. Two BAK1 orthologs and one SERK1 ortholog were identified in the cotton genome. Importantly, GhBAK1 is required for CA4002 resistance to Verticillium wilt. Surprisingly, silencing of GhBAK1 is sufficient to trigger cell death accompanied with production of reactive oxygen species in cotton. This result is distinct from Arabidopsis in which AtBAK1 and AtSERK4 play redundant functions in cell death control. Apparently, cotton has only evolved SERK1 and BAK1 whereas AtSERK4/5 are newly evolved genes in Arabidopsis. Our studies indicate the functional importance of BAK1 in Verticillium wilt resistance and suggest the dynamic evolution of SERK family members in different plant species.     

The Gossypium hirsutum TIR-NBS-LRR gene GhDSC1 mediates resistance against Verticillium wilt

Improving genetic resistance is a preferred method to manage Verticillium wilt of cotton and other hosts. Identifying host resistance is difficult because of the dearth of resistance genes against this pathogen. Previously, a novel candidate gene involved in Verticillium wilt resistance was identified by a genome-wide association study using a panel of Gossypium hirsutum accessions. In this study, we cloned the candidate resistance gene from cotton that encodes a protein sharing homology with the TIR-NBS-LRR receptor-like defence protein DSC1 in Arabidopsis thaliana (hereafter named GhDSC1). GhDSC1 expressed at higher levels in response to Verticillium wilt and jasmonic acid (JA) treatment in resistant cotton cultivars as compared to susceptible cultivars and its product was localized to nucleus. The transfer of GhDSC1 to Arabidopsis conferred Verticillium resistance in an A. thaliana dsc1 mutant. This resistance response was associated with reactive oxygen species (ROS) accumulation and increased expression of JA-signalling-related genes. Furthermore, the expression of GhDSC1 in response to Verticillium wilt and JA signalling in A. thaliana displayed expression patterns similar to GhCAMTA3 in cotton under identical conditions, suggesting a coordinated DSC1 and CAMTA3 response in A. thaliana to Verticillium wilt. Analyses of GhDSC1 sequence polymorphism revealed a single nucleotide polymorphism (SNP) difference between resistant and susceptible cotton accessions, within the P-loop motif encoded by GhDSC1. This SNP difference causes ineffective activation of defence response in susceptible cultivars. These results demonstrated that GhDSC1 confers Verticillium resistance in the model plant system of A. thaliana, and therefore represents a suitable candidate for the genetic engineering of Verticillium wilt resistance in cotton.     

Island Cotton Gbve1 Gene Encoding A Receptor-Like Protein Confers Resistance to Both Defoliating and Non-Defoliating Isolates of Verticillium dahliae

Verticillium wilt caused by soilborne fungus Verticillium dahliae could significantly reduce cotton yield. Here, we cloned a tomato Ve homologous gene, Gbve1, from an island cotton cultivar that is resistant to Verticillium wilt. We found that the Gbve1 gene was induced by V. dahliae and by phytohormones salicylic acid, jasmonic acid, and ethylene, but not by abscisic acid. The induction of Gbve1 in resistant cotton was quicker and stronger than in Verticillium-susceptible upland cotton following V. dahliae inoculation. Gbve1 promoter-driving GUS activity was found exclusively in the vascular bundles of roots and stems of transgenic Arabidopsis. Virus-induced silencing of endogenous genes in resistant cotton via targeting a fragment of the Gbve1 gene compromised cotton resistance to V. dahliae. Furthermore, we transformed the Gbve1 gene into Arabidopsis and upland cotton through Agrobacterium-mediated transformation. Overexpression of the Gbve1 gene endowed transgenic Arabidopsis and upland cotton with resistance to high aggressive defoliating and non-defoliating isolates of V. dahliae. And HR-mimic cell death was observed in the transgenic Arabidopsis. Our results demonstrate that the Gbve1 gene is responsible for resistance to V. dahliae in island cotton and can be used for breeding cotton varieties that are resistant to Verticillium wilt.     

Additional sources of resistance to groundnut rosette disease in groundnut germplasm and breeding lines

Groundnut rosette, a virus disease of groundnut (Arachis hypogaea) transmitted by the aphid, Aphis craccivora Koch, reduces yield in susceptible cultivars by 30–100%. Additional sources were sought in germplasm accessions involving 2301 lines from different sources and from 252 advanced breeding lines derived from crosses involving earlier identified sources of resistance to rosette. The lines were evaluated in field screening trials using an infector row technique during 1996 and 1997 growing seasons. Among the germplasm lines, 65 accessions showed high levels of resistance while 134 breeding lines were resistant. All rosette disease resistant lines were susceptible to groundnut rosette assistor virus. This work identified germplasm and breeding lines that will contribute to an integrated management of groundnut rosette disease. These new sources also provide an opportunity to eliminate yield losses due to the rosette disease.     

Allele-specific CAPS marker in a <Emphasis Type="Italic">Ve1</Emphasis> homolog of <Emphasis Type="Italic">Capsicum annuum</Emphasis> for improved selection of <Emphasis Type="Italic">Verticillium dahliae</Emphasis> resistance

Verticillium wilt (Verticillium dahliae) is an economically important disease for many high-value crops. The pathogen is difficult to manage due to the long viability of its resting structures, wide host range, and the inability of fungicides to affect the pathogen once in the plant vascular system. In chile pepper (Capsicum annuum), breeding for resistance to Verticillium wilt is especially challenging due to the limited resistance sources. The dominant Ve locus in tomato (Solanum lycopersicum) contains two closely linked and inversely oriented genes, Ve1 and Ve2. Homologs of Ve1 have been characterized in diverse plant species, and interfamily transfer of Ve1 confers race-specific resistance. Queries in the chile pepper WGS database in NCBI with Ve1 and Ve2 sequences identified one open reading frame (ORF) with homology to the tomato Ve genes. Comparison of the candidate CaVe (Capsicum annuum Ve) gene sequences from susceptible and resistant accessions revealed 16 single nucleotide polymorphisms (SNPs) and several haplotypes. A homozygous haplotype was identified for the susceptible accessions and for resistant accessions. We developed a cleaved amplified polymorphic sequence (CAPS) molecular marker within the coding region of CaVe and screened diverse germplasm that has been previously reported as being resistant to Verticillium wilt in other regions. Based on our phenotyping using the New Mexico V. dahliae isolate, the marker could select resistance accessions with 48% accuracy. This molecular marker is a promising tool towards marker-assisted selection for Verticillium wilt resistance and has the potential to improve the efficacy of chile pepper breeding programs, but does not eliminate the need for a bioassay. Furthermore, this work provides a basis for future research in this important pathosystem.     

Molecular mapping of Verticillium wilt resistance QTL clustered on chromosomes D7 and D9 in upland cotton

Verticillium wilt is a destructive disease with international consequences for cotton production. Breeding broad-spectrum resistant cultivars is considered to be one of the most effective means for reducing crop losses. A resistant cotton cultivar, 60182, was crossed with a susceptible cultivar, Jun-mian 1, to identify markers for Verticillium resistance genes and validate the mode of its inheritance. Genetic segregation analysis for Verticillium wilt resistance was evaluated based upon infected leaf percentage in the seedling stage using major gene-polygene mixed inheritance models and joint analysis of P₁, P₂, F₁, B₁, B₂ and F₂ populations obtained from the cultivar cross. We found that resis-tance of upland cotton cultivar 60182 to isolates BP2, VD8 and T9, and their isoconcentration mixture was controlled by two major genes with additive-dominance-epistatic effects, and the inheritance of the major gene was dominant. Furthermore, a genetic linkage map was constructed using F₂ segregating population and resistance phenotypic data were obtained using F_2︰3 families inoculated with different isolates and detected in different developmental stages. The genetic linkage map with 139 loci was comprised of 31 linkage groups covering 1165 cM, with an average distance of 8.38 cM between two markers, or 25.89% of the cotton genome length. From 60182, we found 4 QTL on chromosome D7 and 4 QTL on D9 for BP2, 5 QTL on D7 and 9 QTL on D9 for VD8, 4 QTL on D7 and 5 QTL on D9 for T9 and 3 QTL on D7 and 7 QTL on D7 for mixed pathogens. The QTL mapping results revealed that QTL clusters with high contribution rates were screened simultaneously on chromosomes D9 and D7 by multiple interval mapping (CIM), whether from resistance phenotypic data from different developmental stages or for different isolates. The result is consistent with the genetic model of two major genes in 60182 and suggests broad-spectrum resistance to both defoliating isolates of V. dahliae and nondefoliating iso-lates. The markers associated with resistance QTL may facilitate the use of Verticillium wilt resistance genes in improving breeding programs for cotton.     

Marker Assisted Selection (MAS) for chickpea Fusarium oxysporum wilt resistant genotypes using PCR based molecular markers

The exploration of genetically superior accessions is the key source of germplasm conservation and potential breeding material for the future. To meet the demand of better yielding chickpea cultivars in Pakistan the present study was organized to select more stable and resistant lines from indigenous as well as exotic chickpea germplasm obtained from Plant Genetic Resource Institute (PGRI), National Agricultural Research Centre, Islamabad, Pakistan. For the identification and evaluation of chickpea wilt resistant lines against Fusarium oxysporum f. sp. ciceris (Schlechtends), the germplasm was tested in the field for the selection of wilt resistant lines and the PCR based molecular markers were investigated to use Marker Assisted Selection (MAS) for selection of the desirable cultivars. In field trial, 70 % accessions were resistant to wilt disease, while the remaining 30 % have shown susceptibility to the disease. A total of 5 RAPD and 15 SSR markers were screened for molecular based characterization of wilt response. The data of molecular markers were scored by the presence (1) and absence (0) of allele and subjected to statistical analysis. The analysis was based on coefficient of molecular similarity using UPGMA and sorted the germplasm into two groups based on disease response. Among the total used RAPD/SSR primers, only TA194 SSR marker showed linkage to wilt resistant locus at 85 % probability. The linkage of a marker was reconfirmed by receiver operating characteristic curve. The use of the sorted wilt resistant genotypes through SSR marker TA194 can make available ample prospect in MAS breeding for yield improvement of the crop in Pakistan.