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《中国草地学报》2016,(6)
以MS为基本培养基,以柱花草无菌苗的幼根、下胚轴、子叶、茎和真叶为材料,采用正交设计方法,研究不同外植体和激素对柱花草愈伤组织诱导和体细胞胚的影响。结果表明:外植体类型及2,4-D、KT、NAA、6-BA浓度对愈伤组织诱导率的影响均达极显著水平(P0.01),其中2,4-D浓度是最主要的影响因素,其次为外植体类型。下胚轴和真叶为柱花草愈伤组织诱导的理想外植体,愈伤诱导培养基的最优配方为MS+1.0mg/L 2,4-D+0.5mg/L KT+0.01mg/L NAA+0.1mg/L 6-BA。NAA、6-BA浓度对柱花草体细胞胚产生率的影响达极显著水平(P0.01),NAA浓度是主要影响因素,体细胞胚产生的最佳培养基配方为MS+1.0mg/L NAA+1.0mg/L 6-BA+2.0g/L CH。 相似文献
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扁蓿豆愈伤组织诱导和分化条件的研究 总被引：1，自引：0，他引：1
以扁蓿豆3个品系的下胚轴和子叶为外植体,研究不同培养基、不同激素种类和配比对愈伤组织诱导的影响,以及不同分化培养基对愈伤组织分化的影响.结果表明:下胚轴的愈伤组织诱导率普遍高于子叶;品系B1、B2最佳愈伤组织诱导培养基为MS+0.5mg/L 2,4-D+0.5mg/L 6-BA,品系B3最佳愈伤组织诱导培养基为MS+0.5mg/L 2,4-D+0.7mg/L 6-BA;适宜分化的培养基均为MS+1mg/L KT+1mg/L 6-BA. 相似文献
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以柠条锦鸡儿(Caragana korshinskii Kom.)无菌苗的子叶和下胚轴为外植体,研究其愈伤组织诱导及植株再生。结果表明:柠条锦鸡儿子叶和下胚轴均能诱导出愈伤组织,其适宜诱导培养基分别为M S+2,4-D2.0(mg/L)+KT0.1(mg/L)和M S+2,4-D2.0(mg/L)+BA0.5(mg/L);子叶诱导不定芽的适宜培养基为M S+6-BA0.2(mg/L)+NAA0.05(mg/L),下胚轴诱导不定芽的适宜培养基为MS+6-BA0.5(mg/L)+NAA0.05(mg/L);适宜生根培养基为1/2M S+IBA0.5(mg/L)+NAA0.5(mg/L)。本试验结果可为柠条锦鸡儿的快速繁殖利用及品种改良提供依据。 相似文献
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以野生天蓝苜蓿种子发育5～7d无菌苗的子叶、下胚轴和种子苗叶片为外植体,对其愈伤组织诱导及其分化的基本培养与外源激素组合和浓度配比进行试验。结果表明:对子叶、下胚轴和叶片愈伤组织诱导最适宜的基础培养基分别是MS、B5和SH;激素的种类及其浓度配比对于愈伤组织的诱导因不同的外植体有很大的差异。其中,子叶、下胚轴以MS+NAA(0.5～1.0 mg/L)+6-BA(0.7mg/L)效果较好,叶片以SH+NAA(0.5～1.0mg/L)+2,4-D(1.5～5 mg/L)+6-BA(0.7mg/L)较好,少量下胚轴在MS+NAA(0.5mg/L)+6-BA(0.7mg/L)和MS+NAA(0.5mg/L)+KT(0.5 mg/L)的培养基中直接分化出胚状体,并成功发育成植株。在培养基Whb5上,子叶、下胚轴和叶片的分化都得到了很好的效果,分化率分别为43%、57%、40%,15～30d后都能再生植株。 相似文献
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紫花苜蓿愈伤组织诱导及植株再生的研究 总被引：8，自引：3，他引：8
以中牧1号紫花苜蓿的胚轴、叶片、子叶和根为外植体,研究了不同浓度细胞分裂素对胚性愈伤组织诱导的影响,以及不同分化培养基、蔗糖浓度对胚状体分化的影响。结果表明:不同外植体间的愈伤组织诱导率差异较大,以胚轴的愈伤诱导效果最好,愈伤组织诱导率高达92.2%;改良SH+2,4-D2.0 mg/L+BA 0.5 mg/L为最佳胚性愈伤组织诱导培养基;MSO1培养基适于胚状体的分化,蔗糖浓度为25~30 g/L时胚状体诱导率最大可达30.4%;MSO培养基是最佳的成苗培养基。 相似文献
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本文概述了猪的毛色类型、猪的毛色遗传模式,着重综述了猪毛色基因分子基础的研究进展,指出存在问题并就未来发展方向做了思考。 相似文献
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以国际标准强毒Ｒ株人工感染非免疫产蛋鸡,定时扑杀,分别从鼻窦、眶下孔、气管、肺、气囊、卵巢和输卵管分离ＭＧ,并收集感染鸡所产蛋分离ＭＧ。结果表明,人工感染４８小时后上、下呼吸道及肺已被全面感染,９６小时气囊已被感染,１２０小时输卵管已能分离到ＭＧ,卵巢始终分离不到ＭＧ。人工感染鸡自１４４小时便能在其所产蛋中分离出ＭＧ。药物治疗能在７２小时内消除感染,油乳剂苗则需２４天后逐渐降低蛋内ＭＧ分离率,药物卵内注射、种蛋药浴、高温处理均能杀死卵内ＭＧ,但以研制的种蛋浸泡剂药浴效果为最好。 相似文献
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本试验旨在研究两种绿头鸭（白羽绿头鸭和绿头鸭）肌肉营养组成和价值,为绿头鸭肉产品的开发利用提供基础数据和理论依据。选择白羽绿头鸭和绿头鸭60只（每个品种各30只,公母各半）,依照国家标准测定胸肌粗蛋白质、粗脂肪、胆固醇含量及氨基酸、脂肪酸、微量元素和维生素的组成和含量,并对胸肌进行氨基酸评价及脂肪酸营养价值评价。结果显示,白羽绿头鸭肌肉粗蛋白质含量显著低于绿头鸭（P<0.05）;两种绿头鸭肌肉中均检测到17种含量大于0.01%的氨基酸,其中白羽绿头鸭肌肉苏氨酸、组氨酸、丝氨酸和脯氨酸含量显著高于绿头鸭（P<0.05）,赖氨酸、谷氨酸和精氨酸含量显著低于绿头鸭（P<0.05）;检测到13种含量均大于0.01%的脂肪酸,其中白羽绿头鸭硬脂酸和油酸含量显著低于绿头鸭（P<0.05）;检测到9种矿物质元素（钠、镁、钾、钙、锰、铁、铜、锌和硒）,两种绿头鸭差异不显著（P>0.05）;检测到8种维生素,白羽绿头鸭肌肉维生素B1含量显著高于绿头鸭（P<0.05）,维生素D和维生素E含量显著低于绿头鸭（P<0.05）。两种绿头鸭肌肉氨基酸比例接近世卫组织推荐的理想模式,富含人体所需的矿物质元素和维生素,具有广阔的开发利用前景。 相似文献
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魏静 《四川畜牧兽医学院学报》2009,(4):28-32
在现代法律秩序中,商会自治规范是制定法的基础和必要的补充,甚至在某些方面替代了制定法;商会自治规范主要包括商会组织规范、行为规范、惩罚规范以及争端解决规范等;其效力仅及于其内部成员;商会自治规范和制定法之间存在冲突,但也存在整合的基础。 相似文献
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Reasons for performing study: Clinical experiences indicate that centesis of the lateral compartment of the femorotibial joint is often unsuccessful. Objective: To determine the accuracy of 2 published and 2 unpublished techniques of centesis of the lateral compartment of the femorotibial joint. Hypothesis: It was hypothesised that a drug can be administered into the lateral compartment of the femorotibial joint via a diverticulum of this joint that surrounds the medial aspect of the long digital extensor tendon and that this technique is more accurate than described techniques of centesis of this compartment. Methods: Twenty‐four stifles of 12 horses were divided equally into 4 groups and a radiocontrast medium injected into the lateral compartment of the femorotibial joint of each group using a hypodermic needle inserted: 1) caudal to the lateral patellar ligament and proximal to the tibial plateau, 2) caudal to the long digital extensor tendon and proximal to the tibial plateau, 3) between the long digital extensor tendon and bone of the extensor groove of the tibia or 4) directly through the long digital extensor tendon until it contacted bone. Twelve veterinary students who had no experience using any of these techniques performed the injections. Accuracy of each technique was determined by examining radiographs obtained after injecting the contrast medium. Results: The most successful technique for arthrocentesis was by inserting a needle through the long digital extensor tendon. This approach was successful in all attempted cases, whilst other techniques had lower rates of success. Conclusions: The lateral compartment of the femorotibial joint can be accessed accurately by inserting a needle through the long digital extensor tendon as it lies within the extensor groove. Other techniques may not be as accurate for clinicians inexperienced in arthrocentesis of the lateral compartment of the femorotibial joint. 相似文献
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Marioni-Henry K Vite CH Newton AL Van Winkle TJ 《Journal of veterinary internal medicine / American College of Veterinary Internal Medicine》2004,18(6):851-858
A retrospective review of records of 205 cats with histologically confirmed disease of the spinal cord was performed to identify the prevalence of disease in this nonrandomly selected population of cats. Clinical records were reviewed, and age, duration of neurologic illness, and clinical and histopathologic findings in cats with spinal cord disease were abstracted. Disease processes were classified into 7 categories and 23 groups. The most common diseases affecting the spinal cord of cats were feline infectious peritonitis (FIP), lymphosarcoma (LSA), and neoplasia of the vertebral column secondarily affecting the spinal cord. Information on age, onset and duration of clinical signs, and lesion localization at the postmortem examination in cats belonging to the 7 categories of disease were analyzed to create a practical list of differential diagnoses. Cats were also subcategorized into 3 groups based on their age at death. FIP was the most common disease of cats younger than 2 years of age. LSA and vertebral column neoplasia were the most common diseases affecting cats between 2 and 8 years of age. Vertebral column neoplasia was the most common disease affecting cats older than 8 years of age. Results of this histopathologic study showed that FIP and LSA were the most common disease processes affecting the spinal cord of cats. However, at least 21 other groups of diseases and their relative prevalence were identified. 相似文献
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应用光镜和透射电镜技术，观察了3～6月龄比格犬甲状腺的显微和超微结构。结果表明，比格犬甲状腺实质由滤泡和滤泡旁细胞构成。滤泡呈圆形或椭圆形，直径20．22～220．00μm，平均90.80μm；由单层立方上皮细胞围成，细胞高度3．04～7.11μm，平均5.18μm，电镜下可见功能状态不同的两型滤泡上皮细胞；滤泡旁细胞很多，直径4．40～8．82μm，平均6．23μm，位于滤泡之间或镶嵌于滤泡上皮细胞之间，也可聚集在一起形成滤泡样结构，胞质内含有大量的分泌颗粒，电镜下也可见两种类型的滤泡旁细胞。 相似文献
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根据JJF1059-1999《测量不确定度评定与表示》建立了高效液相色谱法测定鸡肉中土霉素残留测量的不确定度评定方法,评定过程包括建立测量程序、分析不确定度来源、对不确定度分量进行量化。将不确定度归类为两大类。随机效应导致的不确定度可以通过一系列具有统计意义的重复观测值进行A类评定;系统效应导致的不确定度通过各测量器具、设备的说明书、校准证书提供的参数进行B类评定。本方法鸡肉中土霉素残留量的相对合成标准不确定度约为3.9%。 相似文献