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利用基因芯片技术筛选棉纤维伸长相关基因 总被引：6，自引：1，他引：5
从回交近交系(backcross inbred lines, BIL)群体中选取纤维长度差异较大的两个系NMGA-062 (33.03 mm)和 NMGA-140 (25.87 mm),利用Affymetrix棉花基因芯片,分析其开花后10 d (DPA, days post anthesis)棉纤维伸长相关基因表达谱。在24 029条转录本中,两材料间差异表达的转录本有7 282条,占总数的30.31%;其中差异表达倍数在2倍或2倍以上的转录本有3 993条,占筛选转录本总数的16.62%,功能分类表明这些转录本主要包括功能预测基因(15.57%)、翻译、核糖体结构相关基因(13.54%)和翻译后修饰、蛋白质转换相关基因(9.29%)3大类。为了验证芯片数据的可信性,8个差异表达显著的基因(Ghi.10655.1.S1_s_at, ACO1, ARF1, SAHH, TUA6, TUA7, β-tub1, β-tub10)被用于实时荧光定量PCR。两种检测手段表现出一致性。随后,利用实时荧光定量PCR对3个与棉纤维相关基因(ARF1, β-tub1, β-tub10)在纤维发育不同时期(5、10、15、20和25 DPA)的表达模式进行了研究,结果表明,3个基因在纤维伸长发育时期(10和15 DPA)大量表达,推测这3个基因可能与棉纤维伸长有重要关系。 相似文献
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利用Affymetrix wheat microarray分析了郑麦9023在低磷和正常磷水培条件下,苗期根部基因在转录水平的差异。结果表明,1)筛选得到1 889个差异表达基因,其中1 298个上调表达,591个下调表达。2)基因功能分析显示,这1 889个基因参与了信号转导、蛋白存储、逆境胁迫、能量代谢、病程相关和其他与植物生长发育有关的过程。3)利用qRT-PCR对其中30个基因的表达情况进行了验证,显示与基因芯片结果基本相同的表达趋势。4)在低磷及磷恢复条件下,对其中5个候选基因(TaSPX3,TaIPS1.3,TaGST_Like,TaPDF19,TaG6PDH1_Like)在不同小麦品种中的表达进行分析,显示这5个基因受到低磷胁迫的强烈诱导,恢复供磷后表达显著回调。但是,这些候选基因在不同品种间横向表达趋势有差别,反应了不同基因型小麦对低磷胁迫的响应机制存在差异。预测这5个候选基因的功能涉及信号转导、氨基酸代谢、糖代谢、抗逆响应等重要的代谢或调控途径,在小麦应对低磷逆境机制中发挥重要作用。 相似文献
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HE Fei SHI Qing-yun CHEN Ming WU Ping 《水稻科学》2007,14(4):256-264
RiceDB, a web-based integrated database to annotate rice microarray in various biological contexts was developed. It is composed of eight modules. RiceMap module archives the process of Affymetrix probe sets mapping to different databases about rice, and aims to the genes represented by a microarray set by retrieving annotation information via the identifier or accession number of every database; RiceGO module indicates the association between a microarray set and gene ontology (GO) categories; RiceKO module is used to annotate a microarray set based on the KEGG biochemical pathways; RiceDO module indicates the information of domain associated with a microarray set; RiceUP module is used to obtain promoter sequences for all genes represented by a microarray set; RiceMR module lists potential microRNA which regulated the genes represented by a microarray set; RiceCD and RiceGF are used to annotate the genes represented by a microarray set in the context of chromosome distribution and rice paralogous family distribution. The results of automatic annotation are mostly consistent with manual annotation. Biological interpretation of the microarray data is quickened by the help of RiceDB. 相似文献
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Detection of Single‐feature Polymorphisms (SFPs) between two tomato varieties and their application in defining the introgressions of resistance loci 
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下载免费PDF全文 Justyna Milc Alessandro Infantino Maria Aragona Nicola Pecchioni 《Plant Breeding》2015,134(2):226-232
The objectives of the study were to (i) demonstrate that the hybridization data from microarrays can yield information on sequence variation between two inbred lines, an introgression line ‘Mogeor’ and its genetic background ‘Moneymaker’; (ii) characterize, by means of the identified SFPs, the introgressed genomic segments of ‘Mogeor’, carrying resistance genes; and (iii) deliver a set of genetically anchored SFPs potentially useful for breeding. In this work, the GeSNP software was used to identify SFPs in tomato using Affymetrix data from a previous experiment. Sequencing of 12 putative polymorphism‐containing amplicons yielded a SFP probe set validation rate of 90%. In total, 92 Gene Models putatively harbouring SFPs were identified, distributed as following: 61 Gene Models on chromosome 9, and one to eight on the remaining tomato chromosomes apart from chromosomes 7, 8 and 12. Newly discovered SFPs from microarray data can thus provide not only useful information for definition of introgressed genomic regions, but also identification of candidate genes and new markers for MAS. 相似文献
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