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1.
实验构建了2个大豆贮藏蛋白Gy1基因种子特异性表达载体,并将其分别转入玉米愈伤组织中。载体1以潮霉素为筛选标记,将Gy1基因片段插入到含有种子特异启动子的植物表达载体pCAMBIA1301-7αP上,得到种子特异性表达载体pCAMBIA1301-7αP-Gy1;载体2以BADH为筛选标记,将Gy1基因插入到带有耐盐基因BADH的植物表达载体pCAMBIA1301-BADH上,得到安全性无抗生素选择标记的种子特异性表达载体pCAMBI-A1301-sbeⅡb-Gy1。通过农杆菌介导法将其分别导入玉米自交系H99的愈伤组织中,共获得132株再生植株;经过PCR检测,初步证明获得了34株转基因阳性植株。  相似文献   

2.
以成熟花生种子萌动4d的上胚轴为受体材料,采用农杆菌介导的转化方法,将倒位重复Δ12脂肪酸脱氢酶基因AhFAD2片段分别与CaMV35S启动子和种子特异性表达的大豆凝集素启动子相连导入花生.经PCR检测证实含有AhFAD2倒位重复基因片段的RNAi抑制表达框架已成功转入花生.  相似文献   

3.
以成熟花生种子萌动4d的上胚轴为受体材料,采用农杆菌介导的转化方法,将倒位重复Δ12脂肪酸脱氢酶基因AhFAD2片段分别与CaMV35S启动子和种子特异性表达的大豆凝集素启动子相连导入花生。经PCR检测证实含有AhFAD2倒位重复基因片段的RNAi抑制表达框架已成功转入花生。  相似文献   

4.
以成熟花生种子的萌动4d的上胚轴为受体材料,采用农杆菌介导的转化方法,将倒位重复Δ12脂肪酸脱氢酶基因AhFAD2片段分别与CaMV35S启动子和种子特异性表达的大豆凝集素启动子相连导入花生。经PCR检测证实含有AhFAD2倒位重复基因片段的RNAi抑制表达框架已成功转入花生。  相似文献   

5.
以成熟花生种子萌动4d的上胚轴为受体材料,采用农杆菌介导的转化方法,将倒位重复△^12脂肪酸脱氢酶基因AhFAD2片段分别与CaMV35S启动子和种子特异性表达的大豆凝集素启动子相连导入花生。经PCR检测证实含有AhFAD2倒位重复基因片段的RNAi抑制表达框架已成功转入花生。  相似文献   

6.
大豆Kunitz型胰蛋白酶抑制剂(trypsin inhibitor,Kti)是大豆品质的主要营养抑制因子之一,培育低Kti含量的大豆品种是提升大豆品质的关键。本研究采用RT-PCR技术克隆得到大豆Kti基因的核心保守序列,并构建成种子特异性表达的、具有Kti基因反向重复结构的RNAi载体,利用农杆菌介导法侵染大豆品种吉林30子叶节,通过潮霉素筛选和PCR检测,获得4株转基因阳性植株。RT-PCR检测表明,构建的种子特异性RNAi载体可以在转基因植株的种子中特异表达,且Kti基因表达量均有降低;通过胰蛋白酶抑制剂活性检测发现,转基因大豆籽粒中胰蛋白酶抑制剂活性平均降低了77.5%。为进一步评价RNAi技术对大豆Kti基因的表达调控效果奠定良好基础。  相似文献   

7.
油菜PEPase基因的克隆及其对应RNAi载体的构建   总被引:8,自引:1,他引:8  
磷酸烯醇式丙酮酸羧化酶(PEPase)是控制油菜蛋白质/油脂含量比例的一个关键酶.采用RT-PCR方法从甘蓝型油菜中双4号中扩增出PEPase基因cDNA片段,与已发表的PEPase基因(登录号为D13987)序列同源性为98%.根据RNA 干扰(RNAi)目标序列的选取原则选取两段长度约为400bp的DNA序列,分别克隆到RNAi载体pHBM1301中,构建了油菜中对应于PEPase基因的RNAi载体pHBM1301-PEP1和pHBM1301-PEP2.  相似文献   

8.
利用基因重组技术,分别克隆木薯SBEⅠ基因ORF中的494 bp的片段和SBEⅡ基因ORF中的340 bp的片段;并通过重叠延伸PCR方法,扩增融合SBEⅠ、SBEⅡ基因片段的大片段SⅢ,将其正向、反向插入植物RNAi表达载体pART27中,同时克隆块根特异性启动子取代原来载体上自有的35S启动子,构建块根特异启动的可编码发夹结构的RNAi表达载体Sp-pRNAiSⅢ,为后续培育高直链淀粉含量的木薯新品种等实验打下基础。  相似文献   

9.
利用基因重组技术,分别克隆木薯SBEⅠ基因ORF中的494 bp的片段和SBEⅡ基因ORF中的340 bp的片段;并通过重叠延伸PCR方法,扩增融合SBEⅠ、SBEⅡ基因片段的大片段SⅢ,将其正向、反向插入植物RNAi表达载体pART27中,同时克隆块根特异性启动子取代原来载体上自有的35S启动子,构建块根特异启动的可编码发夹结构的RNAi表达载体Sp-pRNAiSⅢ,为后续培育高直链淀粉含量的木薯新品种等实验打下基础。  相似文献   

10.
以香蕉Maasr1基因为目的基因,载体pBS为中间载体,pBBB、pBI121为表达载体,分别构建含有Maasr1基因的RNAi植物表达载体DBBB-S-I-A和含有Maasr1基因正义片段的植物表达载体pBl121-S,并通过农杆菌介导的方式对构建的该RNAi载体沉默效果进行鉴定.结果表明:(1)利用中间载体pBS和植物表达载体pBBB成功构建了香蕉Maasr1基因的RNAi植物表达载体pBBB-S-I-A;(2)利用载体pBI121成功构建了1个含有Maasr1基因正义片段的植物表达载体pBI121-S:(3)构建的RNAi载体pBBB-S-I-A可以抑制Maasr1基因的表达,具有较好的沉默效果.  相似文献   

11.
针对豫北地区的大豆生产现状,从气候、土壤、品种、生态因素及市场需求等方面提出了优质大豆的发展策略与途径。  相似文献   

12.
In the western Sahel, indigenous plants become important staples when cereal harvests are inadequate to support populations inhabiting that region of Africa. The purpose of this study was to assess the nutrient content of several of these edible wild plants. The leaves of the following seven plant foods were analyzed: Ziziphus mauritiana, Cerathotheca sesamoides, Moringa oleifera, Leptadenia hastata, Hibiscus sabdarifa, Amaranthus viridi, and Adansonia digitata. The fatty acid, vitamin E, carotenoid, selected mineral and amino acid contents of these plant foods were determined. These same analyses were performed on the fruit of the Adansonia digitata. In quantitative and qualitative terms, Amaranthus viridis was found to be an excellent source of protein. Its amino acid composition compared favorably to that of a World Health Organization (WHO) protein standard. It also contained considerable amounts of the two fatty acids that are essential in humans (linoleic and -linolenic) and a number of minerals including iron, magnesium, calcium and zinc. The leaves of Hibiscus sabdarifa contained an appreciable quantity of protein the composition of which was comparable to the WHO standard. The mineral content of the leaves of this plant was also exceptionally high; noteworthy was its high zinc content. H. sabdarifa also contained significant quantities of the two essential fatty acids. Ziziphus mauritiana was an excellent source of the essential fatty acid linoleic acid and several of the metals including iron, calcium, magnesium and zinc. Its content of other essential nutrients, however, was rather low. In general, Adansonia digitata leaves were nutritionally superior to the fruit of the tree; however, the fruit did contain useful quantities of potassium, phosphorus, zinc and -linolenic acid. The Leptadenia hastata leaves were an especially good source of lutein and -carotene. These data should be useful to the people who inhabit the western Sahel in helping them devise healthy diets during times when cereal staples are in short supply.  相似文献   

13.
以长沙县高桥相同嫩度茶鲜叶原料采用卷曲形毛尖茶加工工艺制绿茶为对照,分别对沅陵县齐眉翠峰、凤娇碣滩茶、干发茶和军大坪茶4种绿茶的主要生化成分与感官品质进行初步分析。结果表明,沅陵4种绿茶的茶多酚总量28.76%~30.34%,游离氨基酸总量2.35%~3.22%,咖啡碱含量3.00%~3.63%,水浸出物含量37.26%~40.07%,可溶性糖总量5.46%~5.65%,可溶性蛋白含量1.50%~1.74%,类黄酮化合物总量1.16%~1.79%,叶绿素总量1.36%~2.01%,儿茶素总量13.53%~16.20%。与对照相比,4种绿茶的茶多酚、可溶性糖和儿茶素总量均高于对照,除齐眉翠峰外其余3种茶样水浸出物和叶绿素总量均高于对照,除干发茶外其余3种茶样类黄酮化合物总量均高于对照。  相似文献   

14.
15.
通过电解质外渗法和匍匐茎恢复试验对‘阳江’狗牙根及其12个通过形态鉴定选出的坪用价值高且花序密度低的诱变后代进行抗寒性鉴定。电解质外渗法结果表明:诱变后代间的抗寒性具有较大差异,其叶片半致死温度(LT50)的变异范围为-7.6~-0.2℃(最低值与最大值相差7.4℃);参试材料抗寒性由强到弱依次为M18>M4>M26>M28> M22>阳江>M29>M31>M10>M37>M16>M1>M25,其中,有5个诱变后代抗寒性优于亲本,分别是M18、M4、M26、M28、M22。匍匐茎恢复实验结果表明:诱变后代M1、M22、M26、M31、M25在0℃和-5℃低温胁迫后的恢复生长率都高于亲本,恢复能力均优于亲本;M10、M37、M28在-5℃低温胁迫下,恢复生长能力低于亲本,抗寒性相对较弱,M16和M4在0℃和-5℃低温胁迫下,恢复生长率都低于亲本,抗寒性明显弱于亲本。综合2种方法鉴定结果显示:诱变后代M1、M25的恢复能力较强;M4、M28的叶片抗寒性较好,青绿期较长;M22、M18、M26的叶片抗寒性和匍匐茎恢复能力均较强;M29,M31的叶片抗寒性和匍匐茎恢复能力与亲本相似;M10、M16、M37的叶片抗寒性和匍匐茎恢复能力均较弱,整体抗寒性较弱。  相似文献   

16.
Irrigation of Netted Gem potatoes was scheduled during three growing seasons by three methods: (a) when plants displayed first visual symptoms of moisture stress, (b) when indicated by a soil moisture budget involving estimated evapotranspiration, and (c) on the basis of tensiometer readings of soil moisture suction. When the tensiometer method of scheduling was used, the mean yields of tubers were 55.0 and 25.8 cwt/acre (6160 and 2890 kg/ha) higher than those obtained with the other two scheduling methods. Methods did not affect the specific gravity of potatoes. Method (a) scheduled irrigations least frequently. Scheduling by the budget method was not always adequate because it was based on the assumption that the crop extracted water from a constant 4 ft (1.2 m) profile from planting to full vegetative growth. In one year the budget method scheduled the first irrigation earlier than necessary and delayed the second irrigation during a critical period of crop growth. From full vegetative cover to harvest the irrigation schedules were alike for both the budget and tensiometer methods.  相似文献   

17.
1 吉林省平安农业科学院大豆研究工作简介吉林省平安农业科学院大豆研究所 ,设在吉林省长春市西安大路种子大厦内。现有科技人员 6人 ,其中研究员 2人 ,农艺师 2人 ,技术员 2人 ,定向培养研究生 2人。大豆研究所的主要任务是选育稳产、高产、优质及抗病虫大豆新品种 ;同时密切  相似文献   

18.
A broadcast application of PCNB (Terraclor) resulted in a reasonably uniform distribution of the chemical in the soil with the concentration decreasing in a linear fashion with increasing depth in the soil profile. A banded application resuluted in a considerably higher chemical concentration at the 4–6 inch depth than at the 0–2 or the 2–4 inch depths. The problem of the lack of uniformity of chemical distribution could probably be solved by altering nozzle placement and size and allow use of the band method of application to minimize grower cost. More complete disking in the case of the broadcast treatment would probably result in a relatively uniform distribution of the chemical but at higher cost to the grower. PCNB application rates of 10, 15 and 25 lbs per acre broadcast and 71/2, 10 and 121/2 lbs per acre in a band significantly reduced the severity ofRhizoctonia infection of Russet Burbank potatoes but did not increase potato yields significantly.  相似文献   

19.
Data from in vivo digestibility trial with four to six horses fed twenty-seven forage-based diets are used to calculate prediction equations for the digestibility of dry and organic matter, based on the crude ash (CA), crude protein (CP) and crude fibre (CF) contents of diets and faeces. The most precise prediction of dry-matter digestibility (r.s.d. = 0.032, R2= 0.80) was derived from a multiple regression including faecal (CP, CF) and dietary parameters (CF). Among faecal parameters, CP was the best single predictor of both digestibility (r.s.d) = 0.040, r2= 0.63) and dietary CP content (r.s.d = 0.028, r2= 0.59). For biological reasons we propose a non-linear model that allows prediction of dry- and organic-matter digestibility from faecal CP Content with reasonable Precision (r.s.d = 0.038, 0.036, r2= 0.65, 0.74, respectively). This will be adequate for many studies, especially for free-living animals in rangelands.  相似文献   

20.
橡胶树丛枝病病原的抗血清制备与应用   总被引:5,自引:1,他引:4  
以感染橡胶树丛枝病病原的长春花为材料,制备得到橡胶丛枝病病原菌抽提液,以抽提液为抗原免疫家兔,制备抗血清,经微量沉淀测定,抗血清效价为1:2048。应用橡胶丛枝病抗血清检测橡胶褐皮病,无症苗木检出率达30%-37%,可疑的褐皮病树检出率达85.7%。  相似文献   

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