共查询到19条相似文献,搜索用时 718 毫秒
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利用SSH技术分离甘蓝抗黑腐病相关基因的研究 总被引:2,自引:0,他引:2
采用抑制差减杂交(SSH)技术,构建甘蓝抗病品种A21经黑腐病菌诱导6、8、12、24h后的混合SSH文库。经反向Northern筛选,共获得87条高质量ESTs。通过NCBI中BLAST数据库比对分析发现,83个ESTs与已知蛋白或基因具有不同程度的同源性。 相似文献
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早春设施马铃薯生产中经常遇到低温冷害、CO2缺乏、病害严重和土壤养分失衡等问题,制约了早春马铃薯的稳产高产.将秸秆生物反应堆技术与早春设施马铃薯栽培结合起来,利用秸秆生物反应堆分解释放热量、CO2、抗病原微生物和增加土壤养分的功效,实现显著的增产效果和良好的效益. 相似文献
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为筛选分离植物根组织特异表达基因,以枳根RNA为试验组,叶RNA为驱动组,构建了枳根消减文库。从该消减文库中共获得有效序列1 177个,其片段长度主要分布在200 ~ 500 bp;序列拼接后得到455个非重复序列,其中245个与已知基因匹配,具有结合功能、催化活性和转运活性等生物学功能,可参与植物的代谢、细胞生长、个体发育、应激反应等生物学过程。实时定量PCR检测结果显示这些基因中的主要乳液蛋白、早期结瘤素样蛋白和贝壳杉烯酸氧化酶等基因在根中高表达。 相似文献
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AIM: To obtain differentially expressed cDNA fragments in the cerebellum of rats and screen unknown expressed sequence tag (EST). METHODS:Suppression subtractive hybridization (SSH) was carried out, in which the cDNA fragments of cerebellum were taken as "tester" and correspondingly that of cerebrum and brain stem as "driver". The homogeneous sequences between the tester and driver were excluded and the rare sequences in cerebellum were enriched by SSH. The differentially expressed cDNA fragments were further cloned for the construction of subtracted cDNA libraries and sequencing. RESULTS: 32 clones were selected and 34 cDNA fragments were sequenced. 8 of 32 were proved to be true positive with reverse Northern assay, 13 of 34 fragments were identified to be new cDNA fragment and given the gene sequence numbers by GenBank (AW288461-AW288474).CONCLUSION:SSH is very useful method for screening differentially expressed genes.Our data may be helpful to understand the molecular mechanism of brain function. 相似文献
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The basic concept of gene therapy is to introduce a therapeutic gene into a cell, whose expression can improve to healing of wound. To achieve this goal, the suitable therapeutic gene has been selected and delivered into the reparative cell, which is becoming a focal point works about gene therapy in wound healing. There have been several different therapeutic genes and gene transfer strategies that have been used in models of wound healing. This article discusses several methods that have been used to deliver genes encoding growth factor proteins, stem cells into wounds and the advantages/disadvantages of each approach. We hope a safe vectors system to deliver the effectual transgene in wound healing. 相似文献
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AIM: To reveal the molecular mechanisms of heat adaptation by study the change of gene expression in rat liver when the rats exposed to hyperthermia stress and heat adaptation. METHODS: Differentially expressed genes in rat liver in association with heat adaptation were identified using the suppression subtractive hybridization (SSH) technique to prepare subtracted cDNA libraries in heat adaptation. The PCR-amplified cDNA fragments generated by SSH were then ligated into the plasmid pGEM-T (Promega). PCR-select differential screening technique was used to filtrate differentially expressed genes. Each of these differentially expressed genes was sequenced and was compared to known sequences in the GenBank database. RESULTS: eight up-regulating expressed genes segments were isolated from the up-regulating differentially expressed library, three of which were known gene such as p53 and five genes were new expressed sequence tags. CONCLUSION: Up-regulating expressed genes such as p53 maybe participate in the signal transduction pathway of heat adaptation. 相似文献
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辣椒Me3基因介导抗根结线虫相关基因的SSH分析 总被引:4,自引:3,他引:1
以辣椒(Capsicum annuum L.)双单倍体HDA149为试验材料,接种南方根结线虫(Meloidogyne incognita)12、24、36 h的根尖材料作为测验方(Tester),相应的未接种根尖材料作为驱动方(Driver),构建一个南方根结线虫诱导Me3 基因表达早期的抑制消减杂交cDNA文库,通过高密度点阵膜杂交差异筛选,获得了309条表达序列标签(EST)。通过测序,除去重复序列共得到259条EST序列,在GenBank上进行BLAST分析,30个EST片段未发现同源性基因,229个为具有同源性的已知基因,其中71个为功能未知的基因。在显微观察和抗性相关EST表达谱分析的基础上,推测在Me3基因介导的不亲和互作中,编码NBS-LRR结构的抗病基因参与了寄主对根结线虫的识别,激发了过敏性坏死反应的信号基因, 同时多种抗性相关的转录因子基因表达, 使以代谢为基础的防御反应和保护机制发挥抗线虫作用。 相似文献
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分子标记在濒危植物遗传多样性研究中的应用 总被引:1,自引:0,他引:1
介绍微卫星DNA标记、RFLP分析、RAPD分析、AFLP分析、ISSR分析的基本原理及其在濒危植物遗传多样性研究中的应用,并对这些分子标记手段的优缺点进行了比较。 相似文献
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