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1.
密穗小麦高分子量谷蛋白亚基组成分析   总被引:14,自引:1,他引:14  
采用十二烷基硫酸钠-聚丙烯酰胺凝胶电泳(SDS-PAGE)方法,分析了32份密穗小麦的高分子量径蛋白亚基(HMW-GS)组成,在3个位点上一共检测到12种不同的亚基类型,在Glu-B1位点上,密穗小麦的高分子量谷蛋白亚基组成具有其明显的组成特点,表现为21和13+16亚基出现频率较高,分别为34.83%和18.75%,而这2种亚基在普通小麦和斯卑尔脱小麦中为极稀有亚基;密穗小麦在Glu-Al和Glu-D1位点上的主要亚基变异形式与普通小麦相似,即以null(Glu-l),2 12和5+10(Glu-D1)为其主要变异形式,另外,本研究还筛选出了7份具有5+10优质亚基的材料,这将为提高密穗小麦与普通小麦种间杂交种的品质杂种优势提供了材料基础,最后讨论了密穗小麦的起源。  相似文献   

2.
用十二烷基硫酸钠-聚丙稀酰胺凝胶电泳方法(SDS-PAGE),分析了4份天然加倍形成的硬粒小麦-节节麦人工合成种的高分子量谷蛋白亚基(HMW-GS)组成。结果表明:4份硬粒小麦-节节麦人工合成双二倍体SHW—Z1,SHW—Z2,SHW—Z3,SHW—z4的HMW—GS分别为6+8、5+12;6+8、5+10;6+8、5+12和6+8、5+10。其中,6+8亚基来自硬粒小麦;5+12,5+10亚基分别来自节节麦As60与As65。硬粒小麦和节节麦的HMW—GS呈共显性遗传,在合成六倍体小麦背景中均得到了表达,且没有出现变异。表明可通过节节麦与二粒小麦杂交并天然加倍的途径创造桥梁种质,将节节麦的优质HMW—GS基因引入普通小麦。  相似文献   

3.
小麦HMW-GS及其评分与部分品质关系的研究   总被引:3,自引:0,他引:3  
通过对小麦HMW谷蛋白亚基(HMW-GS)与部分品质性状关系的分析结果表明:亚基5+10对各个品质性状贡献均好,亚基2+12对各个品质性状贡献一般,亚基3+12、N表现较差。通过对4种HMW-GS评分方法与品质性状的相关性分析结果表明:不同评分方法与品质性状的相关性不同,依据评分评价品种时,应根据不同品质指标采用相应的评分方法。在数量化回归的基础上,确定了面包体积和HMW麦谷蛋白亚基的定量关系。  相似文献   

4.
利用SDS-PAGE方法对源于CIMMYT的六倍体普通小麦材料SYN351进行了高分子量谷蛋白亚基(HMW-GS)分析,结果表明SYN351Glu-A1和Glu-B1位点编码的HMW-GS同时全部缺失,唯有Glu-D1位点编码的HMW-GS(5 10)存在(N,N,5 10),是六倍体普通小麦中一种高分子量谷蛋白亚基缺失的新类型。  相似文献   

5.
四川小麦新品种高分子量谷蛋白亚基遗传变异分析   总被引:2,自引:0,他引:2  
利用SDS—PAGE电泳技术,对收集到的四川省2001—2005年新育成的4_4个小麦品种进行商分子谷蛋白亚基(HMW-GS)组成分析。结果表明,商分子谷蛋白亚基有10种,高分子谷蛋白亚基的组合类型共有16种;在Glu-A1位点有2种等位变异,分别是Null和1;在Glu-B1位点有5种等位变异,分别是7+8、7+9、6+8、17+18和20;在Glu-D1位点有3种等位变异,分别是2+12、5+10和5+12。最最常见的商分子谷蛋白亚基组合类型是N,7+9,2+12和1,20,2+12,出现频率分别是15.9%和13.6%。得分为8分和6分的组合类型最多,出现频率分别为20.5%和25%,除了川麦35(N,20,5+12)的HMW—GS评分不明确之外,43个小麦品种的高分子谷蛋白亚基品质评分平均为6.9分。  相似文献   

6.
以一粒小麦与野燕麦杂交后代中入选遗传性基本稳定的66个株系为材料,用SDS—PAGE电泳方法鉴定分析其株系的高分子量麦谷蛋白亚基(HMW—GS)组成。结果表明,在后代材料中麦谷亚基组成类型丰富。在Glu-A1、Glu-B1和Glu-D1几个位点上分别检测到2种、6种和3种不同的亚基类型。其中,在Glu-A1位点上,1亚基出现频率最高,为87.88%;其次是null类型,为12.12%;在Glu-B1位点上20和7 9亚基出现频率较高,分别为42.42%和34.85%,同时出现14 15优质亚基类型,另外,还存在一些其它新的亚基组合类型(6* 8*、13 19);Glu-D1位点上2 12出现频率最高,为90.91%,并出现了被世界公认的优质亚基5 10类型。入选的66个株系,对条锈病和白粉病免疫。  相似文献   

7.
小麦杂交后代贮藏蛋白的遗传多样性分析   总被引:5,自引:1,他引:5  
采用十二烷硫酸钠-聚丙烯酰胺凝胶电泳法(SDS-PAGE)和酸性聚丙烯酰胺凝胶电泳法(APAGE),分别对节燕97-1和加拿大优质面包小麦Glenlea及其杂交后代(F3)的30个株系进行高分子量麦谷蛋白亚基(HMW-GS)和醇溶蛋白的遗传多样性分析,结果表明,Glenlea具有7+8、5+10亚基,节燕97-1具有1、7+9、5+10亚基,其杂交后代在1A、1B、1D3个位点上都具有多态性,共出现10种亚基类型,其中有5+12、5+10+12、7、6+8、7+8+9、20几种新亚基类。普通小麦中极其稀少的5+12亚基在此后代中占13.3%,5+10+12亚基占10%,具有优质亚基组合7+8、5+10的中50%以上。两个亲本的醇溶蛋白谱带也表现出不同带型,其杂交后代出现17种带型,在α、β、γ3个区均有较大的差异,说明杂交后代的贮藏蛋白变异丰富,存在广泛的遗传多样性。  相似文献   

8.
黑龙江省小麦品系克90-513和克90-514是一对形态和农艺性状极基相近的姊妹系,两者的A-PAGE图谱相同。SDS-PAGE分析只发现两者在Glu-A1位点和在SDS-PAGE图谱低段上各有一差异,克90-513和克90-514的HMW麦谷蛋白亚基分别为2^*,7+8,2+12和1,7+8,2+12。通过对克90-513、克90-514及它们杂交后代衍生的Glu-A1位点HMW-GS近等基因系的研究,分析了1亚基和2^*亚基对烘烤品质的影响,讨论了它们在黑龙江省优质小麦育种中的应用。  相似文献   

9.
利用十二烷基磺酸钠-聚丙烯酰胺凝胶电泳技术(SDS-PAGE)对106份人工合成小麦(2n=6x=42,AABBDD)的高分子量谷蛋白亚基(HMW-GS)组成进行了分析。共检测到27种亚基类型,其中Glu-D1位点上的变异类型最为丰富,发现了包含一种未知亚基及新的亚基组合在内的18种不同类型。分析发现:Glu-A1,Glu-B1和Glu-D1三个位点均编码与小麦面包烘烤品质密切相关的优质亚基类型,如2*,7 8,14 15,5 10,5 12亚基。因此,本批材料可能对小麦的品质改良具有重要的应用价值。  相似文献   

10.
法国小麦种质高分子量麦谷蛋白亚基组成分析   总被引:1,自引:1,他引:0  
为了解从法国引进的小麦种质的高分子量麦谷蛋白亚基(HMW-GS)组成,给小麦亲本选配提供参考依据,利用SDS-PAGE电泳对从法国引进的118份小麦种质进行了HMW-GS组成分析。结果表明,法国小麦种质材料在Glu-A1位点具有Null、1和2^*三种亚基类型;在Glu-B1位点具有五种亚基类型,7、6+8、7+8、7+9和17+18;在Glu-D1位点具有四种亚基类型,2+12、3+12、4+12和5+10,其中优质亚基5+10的频率为62.7%。共检测到32种HMW-GS组成类型,出现较多的是“Null,6+8,5+10”、“Null,7,5+10”、“Null,17+18,5+10”和“Null,17+18,2+12”这四种组合类型,频率分别为11.0%、13.6%、11.9%和8.5%。法国小麦种质大多含有优质亚基,可作为亲本材料用于我国小麦的品质改良。  相似文献   

11.
Web2.0,以个人为中心的互联网时代的到来   总被引:15,自引:0,他引:15  
本文介绍了Web2.0的知识和背景,对Web2.0出现的基础以及典型技术和应用作了阐述,同时对其作出了前景展望。  相似文献   

12.
【目的】 研究盐胁迫条件下,葡萄叶片中多胺含量、多胺氧化酶、多胺合成酶活性以及激素的动态变化,研究不同盐胁迫强度对多胺类物质及激素代谢的影响。【方法】 采用盆栽基质培养模拟盐胁迫环境,设置4个NaCl处理梯度:0 (CK)、1、2和3 g/kg。多胺和激素含量的测定采用高效液相色谱法,多胺合成及分解酶活性的测定采用紫外分光光度计比色法。【结果】 盐胁迫处理后,葡萄叶片中多胺含量和脱落酸含量较对照而言显著增加,玉米素含量显著降低,随胁迫时间的延长,Put、Spm、Spd、ABA以及PAO、DAO、ADC、ODC、SAMDC活性均呈先上升后下降趋势,在10 d及10 d后达到峰值。ZT呈逐渐下降的趋势,并随胁迫强度增大而减小;进行显著性分析后,叶片中多胺含量与Put、Spm、Spd含量呈极显著正相关,DAO、ADC、ODC活性与Put含量呈显著正相关,PAO与SAMDC活性与Spm和Spd含量也呈极显著正相关。【结论】 3种多胺经酶的合成代谢后和激素共同缓解葡萄苗所遭受到的盐胁迫,期间主要发生作用的是多胺合成酶,盐胁迫下多胺与激素含量之间的变化关系也十分密切。  相似文献   

13.
迟贵富  张昱  李亮  钟子琳 《安徽农业科学》2009,37(12):5585-5587
以抚顺地区3个国家基本站50余年气象资料为依托,采用Microsoft Excel工作表实现由气候和农业气候2部分构成的气象与农业综合信息处理系统的基本思路、方法、内容、用途和使用情况。为了实现气候分析及应用的科学化、客观化、系统化、规范化、程序化及连续化的业务目标,按业务流程设计与实现的,包括资料处理、气候趋势模拟、气候预测、气候鉴定、季节性信息化处理、农作物产量预报、气候生产潜力分析等一系列内容在内的系统建设。关键是解决了大量的计算问题,建立了区域性通用模式。  相似文献   

14.
Urban water consumption has some characteristics of grey because it is influenced by economy, population, standard of living and so on. The multi-variable grey model (MGM(1,n)), as the expansion and complement of GM(1,1) model, reveals the relationship between restriction and stimulation among variables, and the genetic algorithm has the whole optimal and parallel characteristics. In this paper, the parameter q of MGM(1,n) model was optimized, and a multi-variable grey model (MGM(1 ,n,q)) was built by using the genetic algorithm. The model was validated by examining the urban water consumption from 1990 to 2003 in Dalian City. The result indicated that the multi-variable grey model (MGM(1,n,q)) based on genetic algorithm was better than MGM(1,n) model, and the MGM(1,n) model was better than MGM(1,1) model.  相似文献   

15.
Campylobacter species are a major cause of foodborne bacterial infections in both developed and developing countries worldwide. Campylobacter jejuni is responsible for the majority of infections. This study was conducted to identify virulenceassociated genes in Campylobacter species isolated from livestock production systems in South Africa. A total of 250 fecal samples consisting of cattle(n=50), chickens(n=50), goats(n=50), sheep(n=50) and pigs(n=50) were randomly collected from livestock in Eastern Cape and KwaZulu-Natal provinces of South Africa between April and October 2018. The samples were analyzed for the presence of virulence genes in Campylobacter species using molecular PCR-based methods. It was found that 77 and 23% of Campylobacter jejuni and Campylobacter coli respectively were isolated from all the livestock samples. There were positive significant(P0.05) correlations amongst all the virulence genes that were investigated. Chisquare and Fisher's exact tests were implemented to test for the effect of livestock species on the presence or absence of virulence genes. The study demonstrated that most of livestock species can potentially cause zoonotic infections and food poisoning due to the high prevalence of Campylobacter. The high prevalence of virulence genes highlights the significance of Campylobacter in livestock production systems in South Africa. This requires the implementation of one-health approaches to reduce the impact of foodborne and zoonotic diseases for the welfare of human and animal health.  相似文献   

16.
选体重约38公斤的长白(♂)×成华(♀)杂交猪20头,随机分为四组,饲予四种不同的饲粮,研究饲粮中添加铜和/或喹乙醇对猪生产性能和某些血液生化指标的影响。结果表明:基础组、加铜组、加喹乙醇组和两者同时加组全期日增重分别为674、761、796、678克,日采食量分别为2.50、2.65、2.74、2.40公斤,饲料利用率分别为3.73、3.49,3.44、3.54,添加铜和/或喹乙醇对试验第65天血清铜兰蛋白、尿素氨及屠宰率、背膘厚和眼肌面积无显著影响(p>0.05);添加铜使65天血清碱性碱酸酶活性极显著增高(p<0.01),添加喹乙醇有使之升高的趋势,两者同时添加时,碱性酸磷酶活性降低。  相似文献   

17.
不同施肥水平对木薯氮磷钾养分积累、分配及其产量的影响   总被引:13,自引:0,他引:13  
 【目的】通过比较不同施肥水平下木薯氮磷钾养分积累、分配和产量的差异,探讨粤北坡岗地优质高产木薯氮磷钾养分的最佳用量。【方法】以木薯品种南美119为材料,采用“3414”方案,在粤北翁源进行大田试验。试验共设14个处理。【结果】施肥处理的氮素主要分配到地上部,不施肥处理的氮素则主要分配到根部;不同施肥处理的磷素均主要分配到地上部;不施肥处理和不施钾处理的钾素主要分配到根部,不施氮处理的钾素在根、冠间分配较均衡。在木薯不同生长阶段,植株氮磷钾含量均呈下降趋势,但施氮、磷、钾化学肥料处理植株氮磷钾含量的下降速度小于不施氮、磷、钾化学肥料的处理。处理N2P2K2的氮、磷、钾含量和积累量在各生育期均为最大,不施肥处理(N0P0K0)的氮、磷、钾含量和积累量在各生育期均为最小(P<0.05)。产量最高的是N2P3K2处理,为22 694.06 kg·hm-2,其次是N2P2K2处理,为21 417.87 kg·hm-2。【结论】木薯产量、氮磷钾养分积累及其在根冠间的分配,对施肥水平高度敏感, 适当比例的氮磷钾肥配合施用既可以显著增加木薯植株的氮磷钾含量和积累量,又可以提高产量。在粤北坡岗地木薯生产中,氮素最重要,在氮素得到满足的条件下,磷素较钾素更重要。在本试验条件下,氮磷钾养分最佳用量为358.80 kgN·hm-2、89.10 kg P2O5·hm-2和187.50 kg K2O·hm-2。  相似文献   

18.
Analysis of genetic interactions between rice and its pathogenic fungi Magnaporthe oryzae and Rhizoctonia solani should lead to a better understanding of molecular mechanisms of host resistance, and the improvement of strategies to manage rice blast and sheath blight diseases. Currently, dozens of rice resistance (R) genes against specific races of the blast fungus have been described. Among them, ten were molecularly characterized and some were widely used for breeding for genetic resistance. The Pi-ta gene was one of the best characterized rice R genes. Following the elucidation of its molecular structure, interaction, distribution, and evolution, user friendly DNA markers were developed from portions of the cloned genes to facilitate the incorporations of the Pi-ta mediated resistance into improved rice varieties using marker assisted selection (MAS). However, rice blast is still a major threat for stable rice production because of race change mutations occurring in rice fields, which often overcome added resistance based on single R genes, and these virulent races of M. oryzae pose a continued challenge for blast control. For sheath blight, progress has been made on the exploration of novel sources of resistance from wild rice relatives and indica rice cultivars. A major quantitative trait locus (QTL), named qSB9-2, was recently verified in several mapping populations with different phenotyping methods, including greenhouse methods. The ability to identify qSB9-2 using greenhouse methods should accelerate the efforts on the qSB9-2 fine mapping and positional cloning.  相似文献   

19.
The present study has been performed to understand the location of the virus, type of apoptotic cells, and their relation to lymph nodes of piglets infected with porcine circovirus type Ⅱ (PCV-2). Nine 32-day-old conventional piglets free of infection with PCV-2 were used, and distributed into three groups: control group (n = 3), piglets inoculated with PCV-2 alone (PCV-2, n = 3), and PCV-2 inoculated and KLH immunostimulated group (PCV-2 + KLH, n = 3). Superficial inguinal lymph nodes from all piglets were collected for histological examination after 32 days postinoculation, and immunohistochemistry for PCV-2 detection. Location of apoptotic cells was detected with TdT-mediated dUTP nick end labeling (TUNEL) and cell cycle, and the apoptotic rates were measured by flow cytometry. The characteristic histopathological lesions of the piglets in PCV-2 and PCV-2 + KLH were lymphocyte depletions in the cortex and paracortex of the lymph nodes, epithelioid-like macrophage infiltration, and intracytoplasmic inclusion bodies presented in epithelioid-like macrophages. PCV-2 was mainly found in epithelioid-like macrophages by immunohistochemistry. In the lymph nodes, lymphocytes presented higher apoptotic rates in the cortex by TUNEL, special B-cell areas, and similar apoptotic cells were found in this compartment in the control. The apoptotic rates of the lymph nodes were 0.41, 3.34, and 4.88% in the control, PCV-2, and PCV-2 + KLH groups by flow cytometry, respectively. The apoptotic rates of lymph nodes for PCV-2 and PCV-2 + KLH piglets were significantly higher than those for the control group (P〈0.05 and P〈0.01). The proliferation index (PI) was 0.17_+0.01, 0.12_+0.01 and 0.12_+0.04 in the control, PCV-2, and PCV-2 + KLH group, the PI of the control group was higher than that of the other groups, but without the statistical difference. PCV-2 can induce lymphocyte depletion in lymph nodes of piglets by blocking cell proliferation and promoting apoptosis. This is one o  相似文献   

20.
内脐蠕孢属、平脐蠕孢属和凸脐蠕孢属的研究   总被引:5,自引:1,他引:5  
本文报道了平脐蠕孢属(Bipolaris)一个新种,一个新组合,5个新记录以及凸脐蠕孢属(Exserohilum)一个新记录。讨论了内脐蠕孢属(Drechslera)、平脐蠕孢属、凸脐蠕孢属与长蠕孢属(Helminthosporium)的关系,并就我国已报道的长蠕孢属真菌按Alcorn等~([1,3,4,5,24])人的意见,逐个进行了订正。  相似文献   

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