CTAB-silica Method for DNA Extraction and Purification from Castanea mollissima and Ginkgo biloba

A new method CTAB-silica for DNA extraction and purification from the leaves and buds of Castanea mollissima and Ginkgo biloba was tested. The method is based on the silica-based purification protocol developed by Boom et al. (1990). By modifying the protocol, plant genome DNA could be extracted easily from dormant buds, mature leaves, and other parts of plant. Our results showed that the purified DNA was of high purity and could be analyzed by PCR. Furthermore, this CTAB-silica method took much less time for a successful DNA purification process compared to the traditional methods (CTAB and SDS). By our method, the suitable DNA can be extracted and purified from over 10 plant samples by one person in an hour.

Comparison of four methods of DNA extraction from rice

Polyphenols,teroens,and resinsmake it difficult to obtain high qualitygenomic DNA from rice.Four ex-traction methods were compared inour study,and CTAB precipitationwas the most practical one.Materials used were old leavesfrom Ftransgenic rice in Hainan andfresh leaves from Ftransgenic rice inKunming.Procedures of the four methodswere as follows:1.Basical method:powder 1 gold or new leaves→added 2 ml ex-traction solution(100 mmol/L

Modified CTAB Method for Extracting Genomic DNA from Wheat Leaf

ObjectiveThe aim was to seek for a rapid DNA minipreparation method from wheat leaf. MethodThe total DNA of wheat leaf was extracted using CTAB, SDS and boiling water, separately, with some modifications. Integrity and purity of nucleic acids were detected through agarose gel electrophoresis, ultraviolet absorption and PCR. ResultThe DNA extracted by the modified CTAB method had high quality and purity, and was not degraded. Two hundreds of DNA samples could be extracted each workday by per capita using this method; and the PCR detection of wheat transgenic plants showed that amplified bands of target gene were clear, without false-positive, and the test results were satisfactory. The DNA purity and concentration extracted by modified SDS method were not as good as that extracted by modified CTAB method, but it also met the DNA requirements of major molecular research. The DNA quantity extracted by modified boiling method was small and there were a lot of impurities in it, PCR detection of this DNA showed no amplified band. ConclusionModified CTAB method is a simple and rapid method for DNA minipreparation from wheat leaf, and was suitable for PCR amplification and other molecular biology researches.

A Method Suitable for Extracting Genomic DNA from Animal and Plant——Modified CTAB Method

[Objective] The study aimed to introduce a rapid and effective method that is suitable for extracting genomic DNA from animal and plant. [ Method ] The genomic DNAs were extracted from tender leaves of 24 peanut cuhivars and from the liver, lung and kidney of white mouse through the specifically modified CTAB method. The DNAs were run on agarose gel, next detected by DNA/Protein analyzer. Finally PCR amplification was conducted to detect the quality of DNAs extracted using the modified CTAB method. [ Result] The clear and orderly bands were observed in gel detection, and the values of OD200/OD200 for DNAs extracted via modified CTAB method were between 1.77 - 1.83. The DNAs performed well in PCR amplification. [ Conclusion] The DNAs extracted by modified CTAB method could satisfy the requirement of PCR amplification.

Comparative Study on Four Methods for Quick Extraction of Sorghum Genomic DNA

[Objective] This study was to find out a quick,simple,and low-cost method for the extraction of sorghum genomic DNA.[Method] Four plant genomic DNA extraction methods based on CTAB,including liquid nitrogen grinding method（method I）,buffer grinding method（method II）,drying grinding method（method III）and directly grinding method（method IV）,were used to extract the sorghum genomic DNA from leaves;further the quantity and quality of the yielded DNA were detected by gel electrophoresis,SSR-PCR and SRAP-PCR.[Result] These four methods performed no remarkable difference in DNA product.The method I and method II produced DNA with higher purity and better integrity,which,especially from method I,is effective for SRAP-PCR and SSR-PCR.While the DNA extracted via method III and method IV had less integrality and lower purity,and only effective in SSR-PCR.[Conclusion] Enough amount of sorghum genomic DNA to perform tens of PCR could be quickly extracted using all these four methods.The DNA obtained via method I and method II had a broader application spectrum（SRAP,RAPD,ISSR and SSR）than that via method III and method IV which is only proper for PCR targeting small DNA fragments（SSR）.

Comparison on Four Extraction Methods of Genomic DNA from Clematis fasciculiflora Franch

[Objective] This study aimed at comparing the four extraction methods of genomic DNA from Clematis fasciculiflora Franch and determining the optimal extraction method for extracting the genomic DNA from Clematis fasciculiflora Franch.[Method] Leavies of Clematis fasciculiflora Franch were used as materials for comparing the purity and concentration of extracted DNA and extracting time among the four extraction methods of genomic DNA including improved CTAB method Ⅰ,improved CTAB method Ⅱ,improved CTAB method Ⅲ and improved SDS method.[Result] The four extraction methods could all be successfully used for extracting the genomic DNA from Clematis fasciculiflora Franch.The purity of genomic DNA was the highest using improved CTAB method Ⅰ,with the longest extracting time;while the concentration of genomic DNA was the maximum using the improved SDS method,with the shortest extracting time and relatively low purity;the extracting time of improved CTAB method Ⅲ was the shortest.[Conclusion] This study had established the optimal extraction method for extracting the genomic DNA from Clematis fasciculiflora Franch and supported for the further research using molecular biological methods.

对CTAB法提取菠菜基因组DNA实验的优化设计

CTAB法是一种经典的提取植物DNA的方法,但传统的提取方法存在RNA污染、DNA提纯率不高等问题。基于这些问题,文章对实验步骤进行了优化,并将使用改良方法提取的菠菜叶片DNA通过紫外分光光度法进行检测。结果表明,使用改良方法提取的DNA其浓度及纯度显著提高,有效提升了实验教学的质量和效率。

珍稀濒危树种金钱槭的基因组DNA提取方法研究

[目的]明确高效提取金钱槭基因组DNA的方法。[方法]以金钱槭幼嫩叶片为材料,采用4种不同方法提取金钱槭基因组DNA,并通过紫外分光光度计法、琼脂糖凝胶电泳检测、限制性内切酶酶切和扩增保守基因片段等方法比较不同DNA的提取效率。[结果]高盐低pH法因操作时间较长导致DNA损失较多,提取到的DNA虽然杂质含量较低,但浓度也较低。SDS法提取效果不佳,提取到的DNA含量少且完整性差。尿素法提取的DNA质量最差,降解严重,难以用于后续分子生物学研究。改良CTAB法可以大量提取能够用于酶切及PCR扩增的DNA。[结论]金钱槭DNA高效提取方法的确定可以为相关的分子生物学研究提供科学依据和技术参考。

Comparison on Methods.for Extracting DNA from Pteridophyta

[ Objective] The aim was to study method for extracting DNA from pteridophyta and provide basis for further study on genetic diversity and taxonomy. [ Method] By changing the dosage of reagent and operating method, CTAB method for extracting DNA was improved. [ Result] The results showed that the improved CTAB method could extract high-quality DNA from pteridophyta. [ Conclusion] The study improved method for extracting DNA from pteridophyta.

入侵植物一年蓬基因组DNA提取方法优化

一年蓬为菊科飞蓬属植物,是分布较广、危害较重的一种外来入侵杂草。为优选该植物基因组DNA的提取方法,本研究采取四因素三水平正交试验设计,对一年蓬基因组DNA的十六烷基三甲基溴化铵(CTAB)提取方法进行优化,并与常规的植物基因组试剂盒法进行对比。结果表明,一年蓬基因组DNA较优的提取方法为改良CTAB法,即一年蓬的干燥叶片经CTAB-free去除多糖,并加入β-巯基乙醇防止酚氧化,用氯仿∶异戊醇(24∶1)抽提3次。改良CTAB法提取的一年蓬基因组DNA质量较高,微量分光光度计检测的A_(260)/A_(280)数值接近1.8~2.0,且凝胶电泳DNA条带清晰,无明显拖带。该方法为该植物的遗传多样性和入侵机制等研究提供参考。

丹参基因组DNA提取方法比较研究

目的:为了探究最适合丹参基因组DNA的提取方法。方法:本研究以丹参叶片为材料,采用不同的方法提取其基因组DNA,通过凝胶电泳检测其完整度、微型分光光度计检测浓度及纯度、看家基因扩增等进行比较,以选择出最适宜的提取方法。结果:应用碱裂解煮沸法、尿素法不能得到完整DNA;4×CTAB法所得的DNA有RNA污染;SDS冰浴法、PVP-40法和尿素法提取的DNA有蛋白质和酚类污染;改良尿素法所得DNA的看家基因扩增效果不好;1.5×CTAB法、2×CTAB法和高盐低pH法提取的DNA能保证看家基因的扩增。结论:2×CTAB法提取的DNA浓度和纯度高,可用于后续相关分子生物学研究。

一种适用于动物与植物总DNA提取的方法——改良CTAB法

[目的]介绍一种简单、高效且能用于提取动物与植物的总DNA的方法。[方法]采用改良CTAB法,从24个花生品种嫩叶及小白鼠的肝、肺和肾中提取DNA,进行琼脂糖电泳和蛋白核酸分析仪检测及PCR扩增检验。[结果]所提取DNA电泳条带清晰,整齐均匀,OD260/OD280值介于1.77～1.83,用于PCR扩增获得理想效果。[结论]该研究介绍的改良CTAB法提取动物和植物的总DNA,满足开展PCR扩增的要求。

改良CTAB法提取野牡丹科7种植物DNA

以野牡丹科植物幼叶为材料,对影响野牡丹科植物DNA提取质量的主要因子进行研究,以期建立适宜野牡丹科植物DNA提取的优化反应体系。结果表明,当提取液中CTAB浓度为4%,沉淀时加入0.6体积的预冷异丙醇、1/2体积的5 mol/L氯化钠及2倍体积的无水乙醇时,所提取到的DNA纯度较高,电泳条带清晰。且在此条件下,能提取出野牡丹科7种植物的DNA。

利用改良CTAB法提取澳洲坚果成熟叶片高质量DNA

澳洲坚果的成熟叶片中次生物质含量很高,因此给DNA的提取造成很大困难。CTAB法可有效去除多糖等杂质,但常规CTAB法的提取效果并不好。为此,我们在此基础上进行改进。采用改良后的CTAB法提取了7个澳洲坚果样品的总DNA。结果表明:使用CTAB free缓冲液进行前处理可去除大部分的杂质。所获得的DNA纯度较高,OD_(260)/OD_(280)均在1.7～1.9之间,RNA消化彻底,DNA无明显降解,进行ISSR分析(UBC-835)条带清晰,多态性好。说明该方法获得的基因组DNA适合于进行以PCR为基础的DNA多态性的研究。

一种快速提取小麦基因组DNA的改良CTAB方法

旨在寻求一种微量、快速提取小麦DNA的方法。以小麦幼叶为材料,用改良CTAB法、改良SDS法、沸水浴法提取小麦叶片总DNA,通过琼脂糖凝胶电泳法、紫外吸收法和PCR检测DNA完整性和纯度。改良CTAB法提取小麦基因组DNA质量和纯度高、无降解,每人每天可以轻松提取200个DNA样品,对转基因植株的PCR检测显示扩增目标条带清晰一致,无假阳性,试验结果理想。改良SDS法所提DNA纯度和浓度虽略不如改良CTAB法,但仍然符合实验要求。沸水浴法提取量少且杂质多,PCR无有效扩增,结果不理想。改良CTAB法提供了一种简便、快速微量小麦DNA提取方法,适用于PCR和其他分子生物学研究。

改良CTAB法和高盐低pH值法提取花生DNA的效果

采用改良CTAB法和高盐低pH法提取花生总DNA,结果表明,高盐低pH法提取的花生DNA分子量略小,DNA有一定程度的降解,但得率大大高于CTAB法,按我们稍有改动的实验方法,每克鲜重的叶片,可提取1000μg以上的DNA。两种方法提取的DNA均可酶切完全,RAPD-PCR扩增,结果相同。高盐低pH值法廉价、步骤少、易掌握,是提取花生DNA较好的方法。

改良CTAB法提取林木树种基因组DNA的研究

目的:验证改良CTAB法提取不同林木树种基因组DNA的效果,寻求一种对于不同林木树种基因组DNA提取普遍使用的方法。方法:采用改良的CTAB法提取22种木本植物基因组DNA,并对其进行定性、定量分析及酶切分析。结果:采用本法可以去除多糖和其他次生代谢物并获得高质量的DNA。结论:该方法可以作为一种适于在实验室进行的林木树种基因组DNA的提取方法。

改良CTAB法提取薰衣草基因组DNA研究

[目的]寻找高效、快速的薰衣草(Lavandula pedunculata)基因组DNA提取方法。[方法]通过改良CTAB法提取薰衣草3个品种的基因组DNA。[结果]经检测,所提样品OD260/OD280值在1.85左右,得率为454.50～1 093.35μg/ml,电泳条带清晰,无明显的拖尾现象;Eco RI酶切基因组DNA图谱表明,提取的DNA能被限制性内切酶完全酶切;以提取的DNA为模板,用1对随机引物进行RAPD-PCR,发现检测条带清晰,说明获得的DNA质量较高,可以满足相关的分子生物学研究需要。[结论]该研究可以为薰衣草分子生物学的后续试验的开展奠定理论基础。

改良CTAB法提取菠萝DNA

采用改良CTAB法提取菠萝叶片叶基、叶尖和叶中部及幼根等部位的DNA，各个部位DNA的OD260／OD280比值为1．72～1．88；OD260／OD2301．45～2．11；提取产量为5．584—24．325μg／g（鲜重）；各个部位DNA提取产量大小排序为：叶基、心叶〉叶中部、叶尖〉幼根。本方法提取的菠萝DNA质量较高，可用作于SRAP分析。

改良CTAB法提取番石榴总DNA的初步研究

以番石榴为试材,采用CTAB、SDS和改良的CTAB法分别从新鲜的番石榴叶片中提取DNA,并对其进行琼脂糖凝胶电泳检测和SCoT-PCR分析。结果表明:3种方法均可以从番石榴的叶片中提取DNA,但改良的CTAB方法通过加入漂洗液2次洗涤,能够较好的去除样品中的多酚、多糖和蛋白质等物质,可以较好的从新鲜的叶片中提取较高质量的DNA,并可以用于SCoT-PCR标记分析。