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1.
以中国传统菊花品种‘小林静’叶片为外植体,建立了‘小林静’较好的再生体系及遗传转化体系.结果表明,‘小林静’叶盘最适不定芽分化培养基为MS+2.0 mg/L 6-BA+1.5 mg/L NAA,不定芽分化率为92.76%,平均再生不定芽数为2.3767个;试管苗最佳生根培养基为1/2MS,生根率达100%.移栽采用灭菌的蛭石,再生苗移栽成活率达90%以上.采用根癌农杆菌C58C1介导的叶盘转化法进行‘小林静’的遗传转化试验,农杆菌OD600=0.5-0.6,侵染10 min后,将叶片外植体接种到MS+2.0 mg/L 6-BA+1.5mg/L NAA的培养基中黑暗共培养2d,之后转接到附加10 mg/L硫酸卡那霉素和400 mg/L羧苄青霉素的分化筛选培养基中进行转化细胞的筛选,待长出抗性芽后转接至生根培养基中进行培养,最终建立了菊花品种‘小林静’的遗传转化体系.  相似文献   

2.
抗菌肽基因转化厚皮甜瓜的研究   总被引:1,自引:0,他引:1  
以厚皮甜瓜FY1的子叶为试材,研究不同激素组合和配比对甜瓜植株再生的影响,并用农杆菌介导法将银杏抗菌肽基因Gnk2-1转化甜瓜。结果表明:(1)甜瓜子叶的最佳愈伤组织及不定芽诱导培养基为MS+2.0mg.L-1 6-BA+0.1mg.L-1 IAA,出愈率和出芽率均达95%以上;最佳芽伸长培养基为MS+0.2mg.L-1 KT;最佳生根培养基为1/2MS+0.1mg.L-1 IAA。(2)卡那霉素对甜瓜外植体的生长和分化有明显的抑制作用,适宜的筛选压力为100mg.L-1。(3)将子叶预培养2d,在农杆菌菌液浓度OD600值为0.5左右时,侵染外植体10min左右,共培养3d,转化效率最高。(4)经PCR鉴定获得了抗性植株,抗病性鉴定显示,转基因植株对枯萎病的抗性有所增强,发病迟缓。  相似文献   

3.
以兼具生态和能源植物功能的木本模式植物——杨树(河北杨)为材料,研究了携带促生长基因(35S-DAS5)的根癌农杆菌载体介导的河北杨遗传转化若干因素对转化效果的影响。结果显示,较适宜的转化系统为预培养2-4 d,农杆菌菌液(OD600值为0.4)侵染20 min,共培养4 d,在含30 mg/L卡那霉素(Km)的培养基上诱导不定芽,生根培养基中Km的适宜浓度为10 mg/L。  相似文献   

4.
双价抗病基因导入籽瓜的遗传转化研究   总被引:1,自引:0,他引:1  
以籽瓜主栽品种新籽瓜2号、五原籽瓜等为研究材料,用苗龄1-3d的子叶切块作外植体,不定芽诱导培养基为MS 6-BA2mg/L IBA 0.1mg/L,芽伸长培养基为MS KT0.2mg/L,诱导生根的培养基是MS IAA0.5mg/L。籽瓜遗传转化研究结果表明农杆菌感染时间以10min,共培养时间以2d为合适。共获得抗卡那霉素100mg/L的试管苗41个,PCR检测呈阳性的有15株,转化率为34.9%。该研究初步建立了籽瓜的遗传转化体系和转化体的检测体系。  相似文献   

5.
高效马铃薯遗传转化体系的建立及甜蛋白基因的导入   总被引:22,自引:0,他引:22  
本研究选用了三个马铃薯(Solanum Iuberosum L.)栽培品种“85T-14-3”、“86-2”及“Favorita”的块茎、微型薯和试管薯为起始材料,应用根癌农杆菌 Ti 质粒系统成功地建立了一种方法简单、速度快和频率高的遗传转化体系。其中试管薯薄片的转化速度最快,经根癌农杆菌(Agrobacterium tumefaciens)共培养后,薄片在100mg/L 卡那霉素的分化培养上,2—3周就可产生出抗性小芽,这些小芽进一步仲长后可在50—100mg/L 卡那霉素的无激素MS 培养基上生根。从共培养到转化植株的获得只需6—7周。微型薯和试管薯的转化频率较高,最高可达67.5%。大多数抗性植株均能检测到胭脂碱合成酶或 GUS 基因的表达。把带有甜蛋白基因和胭脂碱合成酶标记基因的Ti质粒导入马铃薯,获得大量转化植株。叶片抗性检测和 nopaline 检测可推断外源甜蛋白基因已进入马铃薯基因组。  相似文献   

6.
杉木高效再生与基因转化的初步研究   总被引:5,自引:0,他引:5  
用取自60d龄无菌苗上的杉木茎段为外植体,在MS 6-BA0.75mg/L IBA0.25mg/L培养基中诱导芽分化,丛生芽的诱导率达到95.8%,每个外植体平均有5.2个芽。切取诱导芽单苗,转至MS NAA1.0mg/L培养基上诱导根再生,外植体出根率为91.4%。在此基础上,将杉木茎段与农杆菌AGL1共培养2d,通过在含200mg/L卡那霉素的再生培养基中培养,初步筛选出卡那霉素抗生苗,转化频率为1.1%。  相似文献   

7.
为了探讨利用发根农杆菌遗传转化所产生的毛状根来创新香石竹种质的可能性,本文采用叶盘法,建立了发根农杆菌Agrobacterium rhizogenes对香石竹Dianthus caryophyllus L.叶片外植体的遗传转化及其植株再生体系。结果表明,发根农杆菌ATCC15834感染香石竹幼嫩叶片外植体12 d后,从叶片外植体切口中脉处产生白色毛状根,21 d后约90%的叶片外植体产生毛状根。所获得的无菌毛状根能在无外源激素的MS固体和液体培养基中快速自主生长。PCR扩增和硅胶薄层层析结果显示发根农杆菌Ri质粒的rol B和rol C基因以及冠瘿碱合成酶基因已在香石竹毛状根基因组中整合并得到表达。将毛状根置于MS+6-BA 1.0-3.0 mg/L+NAA 0.1-0.2 mg/L中培养15 d后产生淡黄绿色的疏松愈伤组织。愈伤组织不定芽分化的最适培养基为MS+6-BA 2.0 mg/L+NAA 0.02 mg/L,培养6周后不定芽分化率为100%;平均每个愈伤组织产生30-40个不定芽;将不定芽转至1/2 MS或1/2 MS+0.5 mg/L NAA的培养基中10 d后产生不定根,发育成再生植株。再生植株移植于栽培基质中20 d后,成活率达95%以上。  相似文献   

8.
通过对串叶松香草(Silphium perfoliatumL.)不同激素浓度配比的诱导分化实验,建立了串叶松香草离体培养高效再生体系,结果表明MS 6-BA(2.0mg/L) NAA0.1(mg/L)培养基可高效诱导愈伤组织和芽的分化,1/2MS IBA(0.1mg/L)培养基可快速诱导根的生成,形成再生植株。构建了植物表达载体pBI121-VP60,利用根癌农杆菌(Agrobacterium tumefaciens)介导叶盘法转化串叶松香草以研究高效的串叶松香草转化体系,结果显示以农杆菌LBA4404为介导菌株、以叶片为转化外植体、3d预培养时间和3~4d共培养时间、400mg/L羧苄青霉素和40mg/L卡那霉素筛选浓度转化效果较好,并已筛选到两株拟转基因植株,为利用串叶松香草生产兔出血症病毒动物可食用疫苗建立了初步的技术基础。  相似文献   

9.
番茄ACC合酶反义基因对河套蜜瓜的转化   总被引:1,自引:0,他引:1  
河套蜜瓜(CucumismeloLcvHetau)的子叶经预培养。芽诱导和生根培养,获得再生小植株,诱导率达58%。取带有番茄ACC合酶反义基因的双元载体pMQ6/JM109与农杆菌(Agrobacteriumtumefaciens)LBA4404经三亲融合后,与在MS0上萌发5d、并在MS+1mg/LNAA培养基上预培养3d的子叶共培养48h,然后转入含50mg/L卡那霉素的MS+6mg/LZT的芽诱导培养基中,1l个月后诱导生芽,待芽长1.5-2cm时转入生根培养基中,1-2周后可诱导产生大量的根,形成完整的转基因小植株。经PCR和分子杂交检测证明,目的基因已整合入河套蜜瓜的基因组中。  相似文献   

10.
农杆菌介导的紫茎泽兰遗传转化研究   总被引:1,自引:0,他引:1  
以紫茎泽兰为受体材料,GUS基因为报告基因,对农杆菌介导的遗传转化条件及影响因素进行研究,建立了农杆菌介导的紫茎泽兰遗传转化体系。结果表明,将未经过预培养的幼叶外植体在OD600为0.4的稀释菌液中浸泡12min,共培养3d后,转移到加有卡那霉素50mg/L(筛选压)和羧苄青霉素250mg/L的分化培养基上,经过20d外植体直接分化出不定芽,诱导生根成苗。经PCR和组织化学染色鉴定,可稳定获得较高的阳性转化率。  相似文献   

11.
甘蓝型油菜抗虫转基因植株及其抗性分析   总被引:32,自引:0,他引:32  
李学宝  毛慧珠 《遗传学报》1999,26(3):262-268
通过油菜子叶外植体-农杆菌共培养法将苏云金杆菌杀虫蛋白基因导入甘蓝型油菜,获得抗虫的转基因植株。带有1 ̄2mm子叶柄的油菜子叶经农杆菌感染后,共培养2 ̄3天,然后转移到附加15mg/L卡那霉素的MS选择培养基上筛选转化愈伤组织及不定芽。卡那霉素抗性苗相继在含20 ̄50mg/L卡那霉素的选择培养基上继代培养,再转移到含25mg/L卡那霉素的生根培养基上诱导生根。以苏云金杆菌杀虫蛋白基因为探针,进行1  相似文献   

12.
Insect-resistant transgenic cabbage plants and their progenies   总被引:3,自引:0,他引:3  
An insecticidal crystal protein gene of Bacillus thuringiensis was transferred into cabbage genome with the method of Agrobacterium infection. Cotyledons with petioles as explants were cocultivated with Agrobacterial suspension. Calli generated at the basis of petiole were subjected to selection on the MS medium containing 15-30 mg/L kanamycin (Km). About 5% explants produced calli growing continuously on the selective medium. Green shoots appeared on these calli when they were transplanted onto medium with Km and 6-BA for plant differentiation. The shoots were separated and cultivated on medium with kanamycin. About 80% shoots were rooted. Non-transformed control calli could not give normal shoots and roots and brownized and died gradually. Larvae of Pieris rapae showed poisonous symptoms: growth inhibition and mortality when fed with the leaf of the transgenic plants. About 80% of regenerated plants showed positive hybridization bands when their DNA were probed with crystal protein sequence of Bacillu  相似文献   

13.
14.
亚麻遗传转化体系的建立及几丁质酶基因导入的研究   总被引:14,自引:0,他引:14  
报道了亚麻遗传转化体系的建立和几丁质酶基因对亚麻遗传转化的研究。亚麻下胚轴切段培养在不同激素浓度的MS培养基上,诱导分化出不定芽。最佳的激素组合是MS+BA1mg/L+IAA0.5mg/L,分化频率可达97%。亚麻的下胚轴经带有几丁质 根癌农杆菌感染后,在含有100mg/L卡那霉素的选择分化培养基上,14 ̄21d就能产生抗生小芽,小芽进一步伸长后可在100mg/L卡那霉素的MS选择生根培养基(MS  相似文献   

15.
以根癌农杆菌介导法将PSAG12-ipt嵌合基因导入马铃薯栽培品种,对影响马铃薯遗传转化的多种因素进行系统研究.结果表明:马铃薯茎段分化效率高于叶片,马铃薯愈伤诱导和芽分化最适培养基为MS+6-BA 0.25mg/L+NAA 0.25mg/L+2,4-D 0.25mg/L,添加1%Na2SO3能有效防止褐化;茎段愈伤诱导和分化苗生根最适的Kan浓度分别为50mg/L和75mg/L;外植体预培养2d,OD600为0.2~0.5的农杆菌浓度侵染8min、共培养3d后进行选择培养能有效地提高植株再生能力.用PSAG12和ipt双重PCR检测再生植株,阳性转化率为65.8%.Southern blotting结果表明,转基因植株多以单拷贝形式整合进马铃薯基因组中.  相似文献   

16.
An efficient transformation protocol was developed for Eucalyptus tereticornis Sm. using cotyledon and hypocotyl explants. Precultured cotyledon and hypocotyl explants were cocultured with Agrobacterium tumefaciens strain LBA 4404 harboring the binary vector pBI121 containing the uidA and neomycin phosphotransferase II genes for 2 d and transferred to selective regeneration medium containing 0.5 mg/l 6-benzylaminopurine (BAP), 0.1 mg/l naphthalene acetic acid, 40 mg/l kanamycin, and 300 mg/l cefotaxime. After two passages in the selective regeneration medium, the putatively transformed regenerants were transferred to Murashige and Skoog (MS) liquid medium containing 0.5 mg/l BAP and 40 mg/l kanamycin on paper bridges for further development and elongation. The elongated kanamycin-resistant shoots were subsequently rooted on the MS medium supplemented with 1.0 mg/l indole-3-butyric acid and 40 mg/l kanamycin. A strong β-glucuronidase activity was detected in the transformed plants by histochemical assay. Integration of T-DNA into the nuclear genome of transgenic plants was confirmed by polymerase chain reaction and southern hybridization. This protocol allows effective transformation and direct regeneration of E. tereticornis Sm.  相似文献   

17.
Sedums are used as groundcover, in rock gardens and flower borders, and for greening the top floor of buildings, cottages, and thatched roofs. In this study, Agrobacterium-mediated genetic transformation of Sedum erythrostichum was studied by introducing a herbicide-resistant gene (phosphinothricin-N-acetyl-transferase) and a reporter gene (#-glucuronidase, GUS). Following co-cultivation with Agrobacterium on MS medium supplemented with 0.5 mg/l !-naphthaleneacetic acid (NAA) and 2 mg/l 6-benzylaminopurine (BA) for 3 days, leaf segments were transferred onto medium containing 300 mg/l cefotaxime. When adventitious shoots developed directly near the margins of explants after 3 weeks, they were transferred to selection medium with 25 mg/l kanamycin. Of a total of 640 infected leaf explants, 24 (3.75%) produced kanamycin-resistant adventitious shoots; of these, 2.5% were GUS-positive. Transgenic plantlets were confirmed using polymerase chain reaction, Southern, and Northern analyses. Ninety-four percent of the transgenic plantlets were successfully transferred to soil and produced flowers. All GUS-positive transgenic plants were strongly resistant to Basta (phosphinothricin at 200 mg/l) after spraying.  相似文献   

18.
带内含子卡那霉素抗性基因双元载体构建及烟草转化   总被引:1,自引:0,他引:1  
农杆菌介导法是植物基因转化的常用方法,然而由于筛选培养基中常用的抗生素头孢霉素和羧苄青霉素具有类植物激素活性,影响外植体的再生和转化频率。将一个植物的内含子插入卡那霉素抗性基因编码区的N端,合成了一个带内含子的卡那霉素抗性基因。构建带该基因的植物双元表达栽体pYP1202并转化烟草,受侵外植体在含卡那霉素50~200mg/L的选择培养基中抗性芽分化频率不受卡那霉素浓度影响,然而具有GUS活性的转化子占分化芽的比例却随着卡那霉素浓度的增加而升高。当培养基中加入500mg/L羧苄青霉素后受侵外植体产生的抗性芽频率比单一的卡那霉素筛选提高近1倍,高达91.4%,然而具GUS活性的转化子占抗性芽的比例仅有26.7%,在200m/L的卡那霉素筛选下,比例升至93.3%。用带内含子卡那霉素抗性基因构建的植物表达载体转化植物可以减少假抗性芽的产生。  相似文献   

19.
A protocol was developed for Agrobacterium-mediated genetic transformation of niger [ Guizotia abyssinica (L.f.) Cass.] using hypocotyl and cotyledon explants. Hypocotyls and cotyledons obtained from 7-day-old seedlings were co-cultivated with Agrobacterium tumefaciens strain EHA101/pIG121Hm that harbored genes for beta-glucuronidase (GUS), kanamycin, and hygromycin resistance. Following co-cultivation, the hypocotyl and cotyledon explants were cultivated on MS medium containing 1 mg/l 6-benzylaminopurine (BA) for 3 days in darkness. Subsequently, hypocotyl and cotyledon explants were transferred to selective MS medium containing 1 mg/l BA, 10 mg/l hygromycin, 10 mg/l kanamycin, and 500 mg/l cefotaxime. After 6 weeks, hypocotyls and cotyledons produced multiple adventitious shoot buds, and these explants were subcultured to MS medium containing 1 mg/l BA, 30 mg/l hygromycin, and 30 mg/l kanamycin. After a further 3 weeks, the explants (along with developing shoot buds) were subcultured to MS medium containing 1 mg/l BA, 50 mg/l kanamycin, and 50 mg/l hygromycin for further selection. Transgenic plants were obtained after rooting on half-strength MS medium supplemented with 0.1 mg/l alpha-naphthaleneacetic acid, 50 mg/l kanamycin, and 50 mg/l hygromycin and were confirmed by GUS histochemical assay and polymerase chain reaction analysis. Genomic Southern blot hybridization confirmed the incorporation of the neomycin phosphotransferase II gene into the host genome.  相似文献   

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