首页 | 本学科首页   官方微博 | 高级检索  
相似文献
 共查询到20条相似文献,搜索用时 78 毫秒
1.
目的 分析山医群体中国地鼠E家系的遗传纯度。方法 应用经过筛选的 3 1条随机引物对中国地鼠E家系 12只个体基因组DNA进行RAPD扩增 ,计算近交个体间的相似系数。结果 所有样品的相似系数0 943 1到 0 9978之间变动 ,平均相似系数为 0 9749,聚类分析得到了这些个体的同源树资料。结论 山医群体E家系有较高的遗传纯度  相似文献   

2.
目的 利用 SRAP 和 RAPD 两种分子标记技术对9份石斛种质进行遗传多样性研究。方法 用 40 对 SRAP 引物组合和 36 个 RAPD 引物分别对供试石斛的基因组 DNA 进行扩增。结果 SRAP 引物组合共扩增条带 1 977 条,多态性比率为 90.2%,遗传相似系数 GS 值变化范围为 0.330 2~0.789 2。RAPD 引物共扩增出 281 条带,多态性比率为 87.1%,GS 值变化范围为 0.494 2~0.773 1。利用两种标记得到的聚类结果存在一定的差异,SRAP 聚类结果与传统的基于形态特征建立的分类结果比较一致,较好地体现了供试品种的亲缘关系、地域特性。在 9 个石斛供试种间,SRAP 的标记指数 MI 值 (16.46) 是 RAPD 标记 MI 值 (3.67) 的 4.5 倍,表明 SRAP 具有更大的标记效率。结论 两种标记皆可有效应用于该属植物种质资源的遗传多样性分析。而 SRAP 标记在石斛的遗传多样性与亲缘关系的研究中,则表现出了极大的优越性。  相似文献   

3.
应用RAPD标记技术对树鼩遗传多样性的分析   总被引:1,自引:0,他引:1  
目的建立树鼩RAPD(random amplified polymorphic DNA)遗传标记分析方法,了解中缅树鼩种群的遗传多样性。方法采用PCR技术对40条随机引物进行优化,筛选出能有效用于树鼩群体遗传分析的RAPD位点,对48只树鼩个体的基因组DNA进行PCR扩增,并应用Popgene 1.32与RAPDistance Package Version 1.04等软件进行数据处理,分析树鼩的群体遗传特性。结果20个RAPD引物共检测到113个位点,平均每个引物可扩增出5.65个位点,其中多态位点数为69个(占61.1%)。个体间的遗传相似系数平均为0.8307,个体间遗传距离在0.09~0.27之间,平均遗传距离为0.1693。雄性群体的遗传多态度(H0)(0.1864)略高于雌性群体(0.1470),平均遗传多态度(Hpop)为0.1667;树鼩遗传多态度所占的比例在群体内为48.29%,而雌、雄群体间为51.71%。NJ法进行聚类分析得出T15、T33和T47号树鼩个体聚类成一大类,其余45只树鼩个体聚成另一大类,雌、雄个体呈相互交叉现象。结论实验所筛选的随机引物可有效用于中缅树鼩种群的遗传结构分析。本树鼩群体具有较好的遗传多样性。  相似文献   

4.
目的通过对13种石斛属植物进行遗传多样性和亲缘关系分析,为更好地开发利用石斛资源奠定基础。方法随机扩增多态性DNA(RAPD)技术分析遗传多样性,U PGM A类平均法进行聚类分析。结果利用筛选出的10个随机引物对供试材料DNA进行随机扩增,共得到188条带,其中多态性带有180条,多态性百分率为95.74%。采用U PGM A类平均法对扩增出的谱带进行遗传聚类分析,得出反映各种间亲缘关系的树状图。在遗传距离(D)=0.63处,可将供试材料分为3类,RAPD对基因组的分析结果与传统分类学的结果差异不大。结论该标记技术对石斛属植物的遗传多样性和分类研究是可行的。  相似文献   

5.
袁菊红  孙视  彭峰  冯煦  夏冰 《医学教育探索》2007,(10):1555-1561
目的研究石蒜属4种植物的种间亲缘关系和同一种内不同采集地材料的遗传多样性,为其种质资源评价和合理开发利用提供分子佐证。方法用ISSR和RAPD标记分别对不同采集地的37份石蒜属植物(石蒜18份、中国石蒜10份、换锦花5份、忽地笑4份)的基因组DNA的遗传多样性进行检测。结果(1)16条ISSR和17条RAPD引物分别扩增出229和215条带,多态比率分别为85.59%和69.77%,显然,ISSR检测出的多态性条带的能力优于RAPD;(2)ISSR和RAPD标记检测同组供试材料种间或种内的Nei′s遗传相似系数范围分别为0.5459~0.9345,0.6419~1.0000,平均为0.6836,0.7428。两者相关系数r=0.8582,达极显著水平。(3)ISSR和RAPD标记的分子聚类结果相近,两种标记均能准确地把不同来源的材料先按种聚类,种间的分子分类结果与传统经典分类相符;种内不同采集地材料间存在一定的遗传差异,其遗传多样性较为丰富。(4)用POPGENE3.2分析的种间基因分化系数(Gst)与用AMOVA进行的遗传变异巢式方差分析所得结果基本一致。结论两种标记均可用于石蒜属植物种间亲缘关系与种内的遗传多样性研究,虽然ISSR标记在种间遗传多样性检测上分辨力较RAPD标记低,但ISSR标记能检测到更高的种内遗传差异性,更适合种下水平的遗传多样性研究。  相似文献   

6.
目的探讨瓜蒌不同农家品种的遗传多样性和亲缘关系,对其进行分子标记鉴定。方法用25个随机引物对山东瓜蒌不同农家品种、野瓜蒌及对照湖北栝楼进行RAPD分析。采用NTSYS-pc软件计算瓜蒌各农家品种(及种)间的Jaccard遗传相似系数,按非加权配对算术平均法(UPGMA)建立各品种间的聚类图。结果共扩增出266个条带,其中多态带为232条,占87.2%。聚类图显示,对照湖北栝楼与瓜蒌各农家品种和野生种间的差异最大,牛心瓜蒌与仁瓜蒌、大瓜蒌与八棱瓜蒌、小光蛋与野瓜蒌彼此间亲缘关系较近。结论RAPD分子标记法可以在分子水平上规范、整理和鉴定瓜蒌的不同农家品种,揭示了瓜蒌种质资源的亲缘关系以及遗传背景,为山东道地药材瓜蒌的栽培育种及资源保护提供了重要参考。  相似文献   

7.
云南铁线莲属12种药用植物的RAPD分析   总被引:4,自引:0,他引:4  
目的:通过对12种铁线莲属药用植物进行遗传多样性和亲缘关系分析,为生药鉴定提供依据.方法:随机扩增多态性DNA(RAPD)技术分析遗传多样性,UPGMA类平均法进行聚类分析.结果:利用筛选出的10个随机引物对供试材料DNA进行随机扩增,共得到89条带,其中多态性带有89条,多态性百分率为100%.采用UPGM聚类法对扩增出的谱带进行遗传聚类分析,得出反映各种间亲缘关系的树状图.对多数种而言,种间差异明显,同种不同分布点也存在差异,但同一分布点的不同个体差异较小.结论:该标记技术对铁线莲属植物的生药鉴定是可行的,在系统学方面的应用有待进一步研究.  相似文献   

8.
目的揭示栽培黄连Coptis chinensis群体的遗传关系。方法以24个不同来源地的栽培黄连群体为试材,采用SRAP分子标记技术,用Treeconw软件分析遗传相似系数,UPGMA方法聚类,构建遗传系统树。结果36对引物共得到276条扩增条带,其中有120条呈现多态性,占43.48%,从DNA分子水平显示出供试种质遗传多样性并不丰富。遗传相似系数变化范围在0.877 0~0.951 9。聚类结果显示栽培黄连群体遗传关系与来源地无明显相关性,仅在小分支中表现出一定的地域相关性。结论栽培黄连群体的遗传多样性水平较低,显示遗传背景较为单一。  相似文献   

9.
利用ISSR分子标记技术对中华鳖2个不同地理种群(淮河群体、台湾群体)的群体遗传多样性进行分析研究.从32个ISSR引物中筛选出8个引物对2个中华鳖群体37个个体进行扩增,获得77个重复性好且谱带清晰的扩增位点,其中多态性位点47个,多态位点百分率为61.04%;2个群体的多态位点比例分别为59.57%和51.06%.Nei基因多样性分别为0.165 7和0.1524,Shannon信息指数分别为0.2164和0.1977.淮河群体的遗传多样性略高于台湾群体,群体间遗传距离为0.083 7.UPGMA聚类分析显示37个个体聚成两个类群.分析结果表明2个中华鳖群体的遗传多样性相对贫乏,2个养殖群体经过较多世代的人工选育与繁殖可能形成了趋于稳定的独立遗传结构.  相似文献   

10.
目的分析长白山越桔遗传多样性及其亲缘关系。方法用随机扩增多态DNA(RAPD)标记方法对1种野生越桔和2种不同的栽培越桔进行遗传多样性检测和遗传分析。结果采用40个随机引物共检测72个位点,其中多态位点27个,占37.5%;相似系数矩阵表明野生越桔和栽培越桔Ⅰ、栽培越桔Ⅱ的遗传距离分别为0.764和0.809;聚类图表明野生越桔和栽培越桔Ⅱ亲缘关系较近。结论长白山越桔的遗传多样性水平较低,野生越桔和栽培越桔之间的遗传变异不大,遗传因素在越桔形态变异上的作用小于环境因素。  相似文献   

11.
Objective: To evaluatel the value of D-dimers in patients with acute aortic dissection (AAD). Methods: This study consisted of 16 patients with AAD and 27 non-AAD patients. Serum D-dimets were measured by Sta-Liatest D-DI immunoturbidimetric assay. Results: D-dimer level was higher (P < 0.001) in patients with AAD(7.91 ± 5.52 μg/ml) than that in non- AAD group(1.57±1.24 μg/ml). D-dimer was positive (>0.4 μg/ml) in all patients with AAD and in 10 control group patients (37%). Among patients with acute AAD, D-dimers tended to be higher in Stanford A than in Stanford B (8.67 ± 4.31 μg/ml vs. 3.24±1.27 μg/ml, P <0.01). D-dimer values tended to be higher in more extended disease(3.84 ± 1.65 μg/ml, 8.57 ± 3.58 μg/ml and 11.87 ± 5.69 μg/ml in thoracic aorta, thoracic and abdominal aorta, thoracic and abdominal aorta and iliacal arteries, respectively, P < 0.05 for both 8.57 ± 3.58 and 11.87 ± 5.69 vs. 3.84 ± 1.65 ). Including the control group into the analysis, we found a sensitivity of 100%, a negative predictive value of 100%, and a specificity of 66% and a positive predictive value of 64% for D-dimer in diagnosis of AAD in our patients with suspected AAD. Conclusion: D-dimer was elevated in patients with AAD. A negative D-dimer test result could be useful in excluding AAD.  相似文献   

12.
Objective: To set up a simple and reliable rat model of combined liver-kidney transplantation. Methods: SD rats served as both donors and recipients. 4℃ sodium lactate Ringer's was infused from portal veins to donated livers,and from abdominal aorta to donated kidneys, respectively. Anastomosis of the portal vein and the inferior vena cava (IVC) inferior to the right kidney between the graft and the recipient was performed by a double cuff method, then the superior hepatic vena cava with suture. A patch of donated renal artery was anastomosed to the recipient abdominal aorta. The urethra and bile duct were reconstructed with a simple inside bracket. Results: Among 65 cases of combined liver-kidney transplantation, the success rate in the late 40 cases was 77.5%. The function of the grafted liver and kidney remained normal. Conclusion: This rat model of combined liver-kidney transplantation can be established in common laboratory conditions with high success rate and meet the needs of renal transplantation experiment.  相似文献   

13.
目的:评价使用安心颗粒对急诊经皮冠状动脉介入术(PPCI)术后生活质量的影响.方法:将160例接受PPCI的急性ST段抬高型心肌梗死患者随机分为安心颗粒组(术前顿服安心颗粒8.8g,术后安心颗粒4.4 g/次,每日2次)和对照组(仅接受基础药物治疗).所有患者均服用阿司匹林、氯吡格雷和阿托伐他汀.分别在入院时、出院前1d、出院后180 d时,应用心肌梗死多维度量表(MIDAS)、中文版SF-36评价量表对患者生活质量评分.并观察术后30 d以内的出血并发症、血小板减少症发生情况.结果:入院时和出院前1d,两组患者的心肌梗死MIDAS、SF-36量表评分比较无差异(P>0.05);出院后180 d时,与对照组比较,安心颗粒组MIDAS、SF-36评分明显减低(P<0.05);组内与入院时比较,两组出院前1d、出院后180 d时,MIDAS、SF-36评分均降低(P<0.05).两组患者在随访期间均无大量出血、少量出血、重度和极重度血小板减少症发生,安心颗粒组有4例、对照组有7例发生不明显出血(P>0.05).两组发生轻度血小板减少症的患者数比较无差异(P>0.05).结论:PPCI使用安心颗粒,能改善急性ST段抬高型心肌梗死患者的生活质量,且不增加出血风险.  相似文献   

14.
Objective:To investigate the influences of urapidil and nicardipine on rabbit sinus function,atrio-ventricular node function and hemodynamics.Methods:Thirty-two Angora's rabbits were selected and randomly divided into four groups.U1 group:urapidil 0.25 mg/kg;U2 group:urapidil 0.5 mg/kg;N1 group:nicardipine 10 μg/kg;N2 group:nicardipine 20 μg/kg.All these medicine were administrated within 30 seconds.Measurements were taken before and after the administration of urapidil or nicardipine for the following data:mean blood pressure(MAP),heart rate(HR),sino-atrial conduction time(SACT),maximal sinoatrial recovery time(SNRTmax)corrected sinus node recovery time(CSNRT),index of sinus node recovery time(SNRTI),Wenckebach A-V conduction frequency (WB),and P-R interval.Results:Significant MAP and HR changes were identified in all of the four groups before and after administration of both urapidil and nicardipine.No significant changes could be found in the rest of the parameters.Intergroup analysis showed that SACT and CSNRT of N1 and N2 groups were shorter than those of the U2 group(P<0.01);the MAP decreased(P<0.01)and the HR increased drastically(P<0.01).Conclusions:Neither urapidil(0.25 mg/kg,0.5 mg/kg)nor nicardipine(10μg/kg,20μg/kg)has any significant influence on rabbit sinus function or rabbit atrio-ventricular node function.Nicardipine could be a better choice than urapidil for parafunctional sinus node patients.  相似文献   

15.
Objective:To investigate the gene expression of osteoprotegerin(OPG) and osteoclast differentiation factor(ODF) in the bone tissue of patients with hip fracture due to osteoporosis. Methods:OPGmRNA and ODFmRNA in the bone tissue in 50 cases of osteoporosis sufferers(over 50 years old) with hip fracture(Observer Group) and 30 cases of hip facture sufferers with no osteoporosis(Control group) were analyzed with the Semi-Quantitative RT-PCR method. Results:The mRNA expressed of ODF, OPG were both high in the patients with hip fracture. In the control group, the expression of OPG mRNA was observed, while the expression of ODF mRNA was very slight. Conclusion:Aged patients contained all signals including OPG, ODF that are essential for inducing osteoclastogenesis and promoting bone resorption.  相似文献   

16.
Objective:To investigate the clinical features, pathological characteristics and immunophenotype of solid-pseudopapillary tumor of the pancreas(SPTP). Methods:Nine surgically treated cases of SPTP were retrospectively reviewed. Hematoxylin and Eosin(HE) staining and immunohistochemical staining were used to analyze all cases, and the general clinical data was collected. Results:Six patients were asymptomatic except for a palpable mass. Two patients complained of vague-epigastric pain. One patient appeared jaundice. The tumor was encapsulated and solid tissues alternately with cystic tissues. Histologically, the histological structure of solid portion was pseudopapillary with a fibrovascular core. Tumor cells were uniform and medium-sized which were arranged in sheets ets or nests or pseudopapillary patterns. Immunohistochemical studies demonstrated that SPTP proved positive in vimentin(9/9 cases), AAT(9/9 cases), NSE(9/9 cases), ACT(7/9 cases), CK20(2/9 cases), CgA(1/9 cases), S-100(3/gcases), PR(4/gcases), Syn(3/9 cases) and CD56(5/9cases), negative in CEA and ER. Conclusion:SPTP is a tumor predominantly occurring in young women frequently without special symptoms. This tumor has various characteristical histological patterns with different immunophenotype.  相似文献   

17.
In recent years, the author of this essay has applied electro-acupuncture combined with the trigger point needle-embedding for treatment of primary trigeminal neuralgia in 31 cases, yielding satis- factory results as reported in the following.  相似文献   

18.
Objective: To explore the role of matrix metalloproteinase-1,2 (MMP-1, MMP-2) and tissue inhibitor of matrix metalloproteinases-1 (TIMP-1) in endometriosis. Methods: The eutopic and ectopic endometria from 40 subjects suffering from endometriosis and regular.endometria from 40 subjects (excluding endometriosis) were collected and examined by in situ hybridization technology and western blot assay. Results: Both expressions of MMP-1 and -2 were stronger in ectopic endometrium and eutopic endometrium than in normal endometrium. On the contrary, the expression of TIMP-1 in ectopic endometrium and eutopic endometrium was lower. The differences were significant (P 〈 0.01 ). Moreover, there was no relationship among the expressions of MMP-1, 2 and TIMP-1 in ectopic endometrium. Conclusion: The expressions of MMP-1, 2 and TIMP-1 lose balance and lack of periodic changes in ectopic endometrium , which explains the biological invasive behavior of endometriosis. It was suggested-that regulating the balance between the MMPs and TIMP-1 should be an ideal therapeutic target to endometriosis.  相似文献   

19.
Prof. SHI Da-zhuo, Ph.D., male, was born on March 20, 1960. Prof. SHI entered the Ph.D. program in 1990 at the China Academy of Chinese Medical Sciences under the supervision of Prof. CHEN Ke-ji, majoring in the treatment of cardiovascular diseases. After receiving his Ph.D. degree in 1993, Prof. SHI started working at the Cardiovascular Center in Xiyuan Hospital affiliated to China Academy of Chinese Medical sciences.  相似文献   

20.
《中国结合医学杂志》2008,14(2):159-159
The 6th National General Congress of Chinese Association of Integrative Medicine (CALM) was convened at 19-20, April 2008 in Beijing. Academician CHEN Zhu, the minister of Ministry of Health indicated at the congress that the integration of Chinese and Western medicine is very well in keeping with the situation of our country and the general rule of development in medical science; and as a good integration of Chinese medicine and Western medicine, it is mutually beneficial and advantageous to both of them. Seeing the creativity shown in integrative medical investigation in theoretic and methodological sides, we should and must persist in and develop it.  相似文献   

设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号