转基因甜菜GTSB77品系特异性实时荧光聚合酶链式反应检测方法建立

目的 为实现转基因甜菜GTSB77的标识管理,建立其品系特异性实时荧光聚合酶链式反应(PCR)检测方法。方法 针对GTSB77的3′端外源插入片段与甜菜基因组DNA之间的邻接区序列设计引物和探针,建立GTSB77品系特异性实时荧光PCR检测方法,并对该方法的特异性、灵敏度和重复性进行检测。结果 建立的GTSB77检测方法特异性强,定量限(LOQ)为16拷贝,扩增效率为102%,重复性测试结果相对标准偏差(RSD)介于0.21%～1.66%之间。结论 建立的实时荧光PCR方法可应用于GTSB77的鉴定检测。     

转基因棉花MON88913转化体特异性定性、定量PCR检测方法

本文以我国批准商业化的转基因耐草甘膦棉花MON88913为研究对象,建立并验证了其转化体特异性定性、定量PCR检测方法.建立的定性PCR方法的检测极限是20个拷贝棉花单倍体基因组DNA,定量PCR方法的检测和定量极限分别是10和20个拷贝棉花单倍体基因组DNA.同时,我们组织了实验室5位研究人员对建立的定量PCR检测方法进行了协同验证.对5个盲样的定量分析结果显示与真实值的偏差介于1.59% 和10.12%之间,完全满足国际标准25%偏差范围的要求,完全可用于转基因棉花MON88913的实际样品检测.     

荧光PCR和数字PCR法检测转基因DAS-44406-6品系大豆

目的:建立实时荧光聚合酶链式反应(polymerase chain reaction,PCR)检测转基因DAS-44406-6品系大豆的定性检测方法和使用数字PCR检测转基因DAS-44406-6品系大豆的定量检测方法。方法:针对转基因DAS-44406-6大豆品系,进行5’-RACE,测定该品系转基因大豆外源片段与大豆染色体重组的边界序列,并根据该边界序列设计引物和探针。使用23种非DAS-44406-6品系转基因植物作为阴性对照测试实时荧光PCR引物和探针的特异性,以DAS-44406-6品系样品制备6个含量梯度的样品进行检测低限实验。使用数字PCR技术进行定量检测,并确定定量检测的低限。结果:建立的转基因DAS-44406-6大豆品系的实时荧光PCR特异性检测方法品系鉴定特异性较强,实时荧光PCR检测方法的检测低限在模板DNA浓度为100 ng/反应时,为0.01%的转基因大豆含量,约为16.6个拷贝的DAS-44406-6基因组DNA;数字PCR检测方法的检测低限在模板DNA浓度为0.5 ng/反应、转基因大豆含量为1%时,相对标准偏差为0.7%。因此,建立的转基因DAS-44406-6大豆品系实时荧光PCR和数字PCR特异性检测方法符合转基因检测的要求。     

转基因大豆MON89788实时荧光PCR检测方法的建立

为实现转基因大豆MON89788的标识管理,针对转基因大豆MON89788的品系特异性序列设计引物和Taq Man探针,建立转基因大豆MON89788实时荧光聚合酶链式反应(polymerase chain reaction,PCR)检测方法,并对该方法的特异性、灵敏度和重复性进行检测。结果显示:建立的转基因大豆MON89788实时荧光PCR检测方法能扩增出127 bp的产物,特异性强,灵敏度达到0.1%,约为40个单倍体基因组拷贝,检测重复性好,可成功应用于实际样品检测。因此,建立的转基因大豆MON89788实时荧光PCR检测方法可以应用于转基因大豆MON89788大豆及其制品的检测。     

转基因苜蓿草J163品系特异性LAMP检测 方法的建立

目的建立针对我国农业部未颁发农业转基因生物安全证书的转基因苜蓿草品系J163品系特异性等温扩增(loop-mediated isothermal amplification,LAMP)检测方法。方法根据转基因苜蓿草品系J163 5’端外源插入片段与苜蓿草基因组DNA之间的邻接区序列设计6条引物,建立了转基因苜蓿草J163品系特异性LAMP检测方法,并对本方法的特异性、灵敏度进行了测定。结果建立的检测方法特异于转基因苜蓿草J163成分检测,检测最低DNA浓度为(1imit of detection,LOD)为16 pg,相当于10拷贝转基因苜蓿草J163基因组DNA。结论本研究建立的转基因苜蓿草J163品系特异性LAMP检测方法特异性好,灵敏度高,能够快速、准确、稳定地对转基因苜蓿草J163成分进行检测分析。     

Preliminary examination of Spring Break alcohol use and related consequences.

The authors examined the extent to which college student drinkers are at risk for experiencing negative alcohol-related consequences during Spring Break. A sample of first-year college student drinkers (N = 726) participated by completing an online survey assessing typical drinking, as well as Spring Break drinking and related consequences. Findings suggest Spring Break drinking was positively associated with alcohol-related consequences during Spring Break, even after controlling for sex and typical drinking. Furthermore, results indicated that typical drinking moderated the relationship between Spring Break drinking and expected zero-values (i.e., not reporting any Spring Break consequences), such that the association between Spring Break drinking and the likelihood of being a zero-score was less evident for those who are typically lighter drinkers. Identifying and examining temporal and contextually relevant events and associated drinking is critical for understanding and ultimately preventing extreme drinking and associated consequences associated with specific events like Spring Break, which place many students at high risk for experiencing acute harm. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

酶连接探针杂交芯片特异性检测转基因水稻品系

酶连接探针杂交芯片是一种基于连接酶催化的探针杂交芯片技术,其原理是采用硫代引物保护法,利用 Lambda DNA外切酶将多重聚合酶链式反应产物切割成单链。在氨基修饰的芯片上固定5’端探针,并与制备的产物 单链进行杂交,加入荧光修饰的第2个探针与之前的探针进行酶连接反应,从而实现高特异性、高通量检测。结果 表明：酶连接探针杂交芯片技术检测4 种转基因水稻品系特异性好,灵敏度可达0.1%（m/m）,可以应用于进出口 检验检疫、食品安全监测等领域。     

Event-Specific Qualitative and Quantitative Detection in Transgenic Soybean OsDREB3 Based on the 5′ Flanking Sequence

With the development of genetically modified organisms, labeling regulations have been introduced that require appropriate detection methods. Event-specific qualitative and quantitative polymerase chain reaction (PCR) detection methods have become the internationally agreed state-of-the art. Using adaptor PCR, we analyzed the flanking sequences of exogenous integrant in transgenic soybean OsDREB3, which has resistance genes. In this study 5′ region flanking sequences of exogenous gene were identified in the soybean OsDREB3 genome, which was integrated in chromosome 1 with an additional 394 bp insertion between soybean genomic DNA and exogenous gene. Based on these inserts and flanking sequences, the event-specific qualitative and quantitative PCR system was established for this line. In the conventional qualitative PCR assay, the event-specific primers designed were confirmed to be specific and the limit of detection (LOD) was 0.1%. In the quantitative real-time PCR assay, the LOD and the limit of quantity were 10 and 100 haploid genome copies, respectively. The goodness of the linearity and high efficiency of the PCR reaction indicated the utility of the established PCR system. This study provides two reliable methods and information for detection, identification, and quantification of the presence of non-authorized transgenic soybean OsDREB3.     

转基因鲑鱼AquAdvantage品系特异性实时荧光聚合酶链式反应检测方法的建立

目的实现转基因鲑鱼AquAdvantage的标识管理,建立其品系特异性实时荧光聚合酶链式反应(PCR)检测方法。方法针对转基因鲑鱼的品系特异性序列设计引物和TaqMan探针,建立转基因鲑鱼实时荧光PCR检测方法,并对该方法的特异性、灵敏度和重复性进行检测。结果建立的转基因鲑鱼实时荧光PCR方法特异性强,在600 000~60拷贝范围内呈良好的线性关系,其线性回归方程为y=-3.2194x+40.805,R~2=0.997,检测限为60拷贝,检测重复性良好。结论建立的品系特异性实时荧光PCR方法可应用于转基因鲑鱼AquAdvantage的鉴定。     

转基因玉米59122品系的特异性检测

使用反向聚合酶链式反应(PCR)技术克隆了转基因玉米59122的外源基因与玉米基因组之间的两段侧翼序列,并据其左侧侧翼序列设计了具品系特异性的引物,运用半巢式PCR技术建立了59122的品系特异性二重PCR检测方法,扩增片段100bp,横跨pat终止子与转基因玉米侧翼基因之间。以转基因玉米59122、MON863、MON810、GA21、NK603,转基因大豆Roundup Ready和转基因油菜GT73等为材料,证明本方法与其他转基因作物具有高特异性。本方法在检测59122时,确定出连接体系中线性DNA的最佳质量浓度为1ng/μL左右,检出限达到0.1%,灵敏度为38个单倍体基因组拷贝数。因此可准确、快速、高效地检测转基因玉米及其产品,或作为常规PCR定性检测后的验证方法。