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1.
根据抗条纹叶枯病品种"秀水123"与易感品种"日本晴"抗条纹叶枯病基因qSTV11~(KAS)在距离起始密码子第一个脱氧核苷酸+640处的差异,建立了一种能够更便于区分qSTV11~(KAS)基因型的CAPS(BtgⅠ)分子标记及检测方法,并对23种香型水稻的qSTV11~(KAS)基因进行调查分析.结果表明,CAPS(BtgⅠ)分子标记可以用来区别水稻是否含有抗条纹叶枯病基因qSTV11~(KAS)及基因型;在检测的23种香稻中,仅有"中香1号"、"青香软粳"和"泰国香稻"3种水稻含有与"秀水123"相同的qSTV11~(KAS)抗性基因.本研究为今后分子标记辅助选育抗条纹叶枯病香型水稻新品种和筛选条纹叶枯病新的抗性基因资源应用奠定了基础.  相似文献   

2.
利用来自11个国家的34个水稻白叶枯病菌菌株,以高感品种IR24、含有已克隆的抗白叶枯病基因Xa21的品系C64(IRBB21)、中花11和日本晴4个水稻品种作为参照,对一个含有来自小粒野生稻(Oryza minuta)的抗白叶枯病基因Xa-min(t)的渐渗品系(introgression line)78-15进行了抗谱鉴定.结果表明,Xa-min(t)是一个广谱、高抗的白叶枯病抗性基因.同时,以IR24和78-15为亲本进行杂交,并采用分离群体分组分析法(BSA)、随机引物扩增多态性DNA(RAPD)和序列特异性扩增区(SCAR)筛选与Xa-min(t)连锁的分子标记.共筛选了800个购自Operon公司的随机引物,其中有2个引物,BE05和BE06,可扩增出与Xa-min(t)连锁的RAPD标记BE05300和BE061400.对这两个DNA片段克隆并测序,根据两端序列设计了两对长度为21~24 bp的特异引物扩增供试材料,其中一个RAPD标记可转化成稳定、重复性好的SCAR标记ScBE05300.用ScBE05300和BE061400标记分别对IR24和78-15的杂交F2代948和719个单株进行的连锁分析表明,这两个标记与Xa-min(t)的连锁距离分别为2.2和3.7 cM,并位于Xa-min(t)的同一侧.这些结果为Xa-min(t)的精细物理图谱的构建奠定了基础.  相似文献   

3.
利用来自11个国家的34个水稻白叶枯病菌菌株,以高感品种IR24、含有已克隆的抗白叶枯病基因Xα2的品系C64(IRBB21)、中花11和日本晴4个水稻品种作为参照,对一个含有来自小粒野生稻(0ryza minuta)的抗白叶枯病基因Xα—min(t)的渐渗品系(introgression line)78-15进行了抗谱鉴定。结果表明,Xα—min(t)是一个广谱、高抗的白叶枯病抗性基因。同时,以IR24和78—15为亲本进行杂交,并采用分离群体分组分析法(BSA)、随机引物扩增多态性DNA(RAPD)和序列特异性扩增区(SCAR)筛选与Xα—min(t)连锁的分子标记。共筛选了800个购自Operon公司的随机引物,其中有2个引物,BE05和BE06,可扩增出与Xα—min(t)连锁的RAPD标记BE05 300和BE06 1400。对这两个DNA片段克隆并测序,根据两端序列设计了两对长度为21~24bp的特异引物扩增供试材料,其中一个RAPD标记可转化成稳定、重复性好的SCAR标记ScBE05 300。用ScBE05 300和BE06 1400标记分别对IR24和78—15的杂交F2代948和719个单株进行的连锁分析表明,这两个标记与Xα—min(t)的连锁距离分别为2.2和3.7cM,并位于Xα—min(t)的同一侧。这些结果为Xα—min(t)的精细物理图谱的构建奠定了基础。  相似文献   

4.
分子标记辅助选择技术可有效改良武运粳8号条纹叶枯病抗性武育粳8号是深受消费者喜爱的稻米产品,在江苏和上海稻米市场十分畅销,但由于该品种易感条纹叶枯病,生产应用受到限制。扬州大学江苏省作物遗传生理重  相似文献   

5.
杉木杂种群体分子框架遗传连锁图初报   总被引:19,自引:1,他引:18  
利用随机扩增DNA多态性分子遗传标记-RAPD,以杉木J0和F11两个亲本杂交形成的F1群体为作图群体,从1040个随机引物中筛选出78个引物,对78个F1群体及双亲样本进行了RAPD扩增,共获得129个RAPD标记,首次构建了杉木分子遗传连锁框架图,其中J0亲本包含8个连锁群,标记覆盖的基因组总长度约为595.2cM,F11亲本包含4个连锁群,标记覆盖的基因组总长度约为315.3cM。129个RAPD标记中偏分离标记占14.7%。本图谱为构建饱和的杉木分子遗传图谱提供了框架结构,为进一步开展杉木分子遗传方面的研究奠定了基础。  相似文献   

6.
基于InDel分子标记的20个水稻品种的籼粳属性分析   总被引:2,自引:0,他引:2       下载免费PDF全文
水稻品种的籼粳属性分析是培育高产优质杂交水稻亲本选择的重要依据之一。本研究以93-11与日本晴分别为籼粳稻参考标准,利用均匀分布于水稻基因组12条染色体并具有较高籼粳特异性的37对In Del分子标记,对20份水稻育种材料进行In Del标记的籼粳属性分析。结果表明:所选取的20份水稻材料中,有8份为典型籼稻,3份为典型粳稻,4份为偏籼类型,另有5份为偏粳类型。NTsys聚类分析结果显示,在遗传相似系数为0.43处,20份水稻材料被分为两大类群;在遗传相似数为0.70处,所有水稻材料则被分为4个类群。  相似文献   

7.
利用ISSR技术对优质红锥种质资源遗传多样性的分析   总被引:6,自引:0,他引:6  
利用ISSR分子标记对10个优质红锥品种进行基因组多态性分析.从20条引物中筛选的11条具有扩增多态性的引物共扩增出435条带,其中多态性条带325条,占总扩增条带的74.7%,平均每个引物扩增3.95条.ISSR标记揭示的10个优质红锥品种的遗传相似系数变化范围为0.473 7~0.808 1 ,平均值为0.728 7.聚类分析可将10个优质红锥品种分为四类.  相似文献   

8.
从5组24个随机引物中筛选出16个重复性好的多态引物,对四川9个黑山羊品种(群体)共计572只个体,进行随机扩增多态DNA(RAPD)标记研究.结果表明,16个引物扩增出125条带,其中102条带呈现多态,多态率为81.61%.不同引物扩增出的DNA片段在各品种(群体)中的分布频率不同.9个黑山羊品种(群体)间相似系数为0.7533~0.9642,遗传距离指数为0.0358~0.2467.引物OPQ-06(序列为GAGCGCCTTG)未在乐至黑山羊中扩增出900bpDNA片段,而在其他8个黑山羊品种(群体)中出现率均为1,可作为区分乐至黑山羊和其他8个黑山羊品种(群体)的分子遗传标记.引物OPK-03(序列为CCAGCTTAGG)未在江安黑山羊扩增出550bpDNA片段,在其他8个黑山羊品种(群体)中出现率均为1,可用于区分江安黑山羊和其他8个黑山羊品种(群体)的分子遗传标记.  相似文献   

9.
采用SSR分子标记技术研究燕麦杂交后代与亲本之间在DNA分子水平上的遗传变异,为杂交亲本选配提供基因组水平理论依据。试验从50对SSR引物中筛选出11对多态性明显、重复性比较好的引物,共扩增出143个DNA片段,其中111个片段呈现多态性,占总扩增片段的63.3%;燕麦杂交后代与亲本的相似性系数范围为0.42~0.77。UPGMA聚类分析结果表明,SSR标记能将这14个杂交后代相互区分开,且品系Ⅱ比品系Ⅰ遗传变异较大。  相似文献   

10.
利用ISSR技术对优质红锥种质资源遗传多样性的分析   总被引:1,自引:0,他引:1  
利用ISSR分子标记对10个优质红锥品种进行基因组多态性分析.从20条引物中筛选的11条具有扩增多态性的引物共扩增出435条带,其中多态性条带325条,占总扩增条带的74.7%,平均每个引物扩增3.95条.ISSR标记揭示的10个优质红锥品种的遗传相似系数变化范围为0.4737~0.8081,平均值为0.7287.聚类分析可将10个优质红锥品种分为四类.  相似文献   

11.
碱基的插入/缺失(InDel)引起DNA序列变化并形成了DNA片段长度多态,可以用作遗传标记.为了评价基于籼稻93-11和粳稻日本晴全基因组序列比对获得的差异片段而设计的InDel引物在鉴定籼稻和粳稻两种生态型以及研究稻属不同物种之间亲缘关系的意义,采用45对InDel引物,对来自亚洲10个国家的49份籼稻、43份粳稻品种和24份野生稻进行了检验.结果表明,其中41对InDel引物鉴定籼稻或粳稻品种的准确率高于80%.主成分分析散点图显示:籼稻与粳稻存在明显的遗传分化;含AA基因组的野生稻物种与籼稻品种存在较近的亲缘关系;非AA基因组的野生稻物种不存在明显的籼-粳分化.并且证明了基于籼稻93-11和粳稻日本晴全基因组序列比对获得的InDel差异片段设计的引物可以用于栽培稻籼稻和粳稻品种的鉴定以及籼-粳分化问题的研究,及探索稻属不同物种间的亲缘关系.  相似文献   

12.
Novel bacterial blight (BB) resistance gene(s) for rice was (were) introduced into a cultivated japonica rice variety Oryza sativa (cv. 8411), via somatic hybridization using the wild rice Oryza meyeriana as the donor of the resistance gene(s). Twenty-nine progenies of somatically hybridized plants were obtained. Seven somatically hybridized plants and their parents were used for AFLP (amplified fragment length polymorphism) analysis using 8 primer pairs. Results confirmed that these plants were somatic hybrids containing the characteristic bands of both parents. The morphology of the regenerated rice showed characters of both O.sativa and O.meyeriana. Two somatic hybrids showed highest BB resistance and the other 8 plants showed moderate resistance. The new germplasms with highest resistance have been used in the rice breeding program for the improvement of bacterial blight resistance.  相似文献   

13.
河北省水稻育种目标及发展策略   总被引:1,自引:0,他引:1  
通过对河北省水稻育种历史的回顾和面临形势的分析,结合育种实践,明确了育种目标,提出了资源引进创新、采用聚合杂交、利用逆境进行定向选择,培育抗条纹叶枯病品种,同时注重粳型杂交稻选育,加强育种科技储备的育种策略。  相似文献   

14.
水稻苯达松敏感致死基因的RAPD标记的克隆及测序   总被引:1,自引:0,他引:1  
用3S Spin DNA Agarose Gel Purification Kit试剂盒将与水稻苯达松敏感致死基因相连锁的RAPD遗传标记S20—420和S316—600回收纯化,连接于pGEM—T载体并克隆测序,得到了S20—420和S316—600的全序列,其长度分别为423bp、606bp.将两端序列设计特异PCR扩增引物可用于检测水稻苯达松敏感致死基因和标记辅助育种.  相似文献   

15.
稻米食味品质改良是目前水稻育种的重要研究方向之一.明确不同水稻食味品质基因型,可为优质水稻育种研究的亲本选择提供依据.本研究利用分子标记检测技术,对22个目前上海市种植的重要常规水稻和杂交稻亲本食味品质基因的基因型进行检测.结果发现,"紫香糯861"水稻含有相对较多不良食味品质基因型.3种杂交稻父本,"湘晴"、"R44"和"繁14"的食味品质基因型比这3种杂交稻母本,"寒风A"、"秋风A"和"申9A"以及其他常规稻有欠缺.从蜡质基因多态性分析显示,在本研究选用的22种水稻中,2个为糯稻、20个为粳稻,但其中有4个为软米型粳稻;在16个非软米型粳稻中,"宝农34"、"金丰"和"银香18"是具有相对最好食味品质基因型的水稻品种.  相似文献   

16.
An efficient molecular method for the accurate and efficient identification of indica and japonica rice was created based on the poly-morphisms of insertion/deletion (InDel) DNA fragments obtained from the basic local alignment search tool (BLAST) to the entire genomic sequences of indica (93-11) and japonica rice (Nipponbare). The 45 InDel loci were validated experimentally by the polymerase chain reaction (PCR) and polyacrylamide gel electrophoresis (PAGE) in 44 typical indica and japonica rice varieties, including 93-11 and Nipponbare. A neutrality test of the data matrix generated from electrophoretic banding patterns of various InDel loci indicated that 34 InDel loci were strongly associated with the differentiation of indica and japonica rice. More extensive analyses involving cultivated rice varieties from 11 Asian countries, and 12 wild Oryza species with various origins confirmed that indica and japonica characteristics could accurately be determined via calculating the average frequency of indica- or japonica-specific alleles on different InDel loci across the rice genome. This method was named as the "InDel molecular index" that combines molecular and statistical methods in determining the indica and japonica characteristics of rice varieties. Compared with the traditional methods based essentially on morphology, the InDel molecular index provides a very accurate, rapid, simple, and efficient method for identifying indica and japonica rice. In addition, the InDel index can be used to determine indica or japonica characteristics of wild Oryza species, which largely extends the utility of this method. The InDel molecular index provides a new tool for the effective selection of appropriate indica or japonica rice germplasm in rice breeding. It also offers a novel model for the study of the origin, evolution, and genetic differentiation of indica and japonica rice adapted to various environmental changes.  相似文献   

17.
An active DNA transposon family in rice   总被引:40,自引:0,他引:40  
Jiang N  Bao Z  Zhang X  Hirochika H  Eddy SR  McCouch SR  Wessler SR 《Nature》2003,421(6919):163-167
The publication of draft sequences for the two subspecies of Oryza sativa (rice), japonica (cv. Nipponbare) and indica (cv. 93-11), provides a unique opportunity to study the dynamics of transposable elements in this important crop plant. Here we report the use of these sequences in a computational approach to identify the first active DNA transposons from rice and the first active miniature inverted-repeat transposable element (MITE) from any organism. A sequence classified as a Tourist-like MITE of 430 base pairs, called miniature Ping (mPing), was present in about 70 copies in Nipponbare and in about 14 copies in 93-11. These mPing elements, which are all nearly identical, transpose actively in an indica cell-culture line. Database searches identified a family of related transposase-encoding elements (called Pong), which also transpose actively in the same cells. Virtually all new insertions of mPing and Pong elements were into low-copy regions of the rice genome. Since the domestication of rice mPing MITEs have been amplified preferentially in cultivars adapted to environmental extremes-a situation that is reminiscent of the genomic shock theory for transposon activation.  相似文献   

18.
富钾植物DNA导入早稻变异后代的RAPD分析   总被引:4,自引:0,他引:4  
应用花粉管通道法和浸种法将两种富钾植物空心莲子草和商陆DNA导入到不同的水稻品种中,结果在其后代产生了广泛的变异,并从中筛选出耐低钾的变异材料。应用PCR技术对其中耐低钾的4个变异材料进行了RAPD分析。结果表明,所用100个随机引物中有7个引物在受体和变异后代间扩增出了多态性产物。后代和受体的相似系数均在90%以上,而与供体的相似系数只有6%以下,其中有三个引物的扩增产物中出现了供体的特异性带。这说明空心莲子草和商陆DNA导入水稻后确实引起了水稻基因组结构的变化,同时也为变异后代所发生的生物学性状的改变提供了直接的分子证据。  相似文献   

19.
Drought, flood, salinity, or a combination of these limits rice production. Several rice varieties are well known for their tolerance to specific abiotic stresses. We determined genetic relationship among 12 rice varieties including 9 tolerant to drought, flood, or salinity using inter-simple sequence repeat (ISSR) markers. Based on all markers, the nine tolerant varieties formed one cluster distinct from the cluster of three control varieties. The salt-tolerant varieties were closest to two flood-tolerant varieties, and together they were distinct from the drought-tolerant varieties. (GA)8YG was the most informative primer, showing the highest polymorphic information content (PIC) and resolving power (Rp). The drought-, flood-, and salt-tolerant varieties grouped in three distinct clusters within the group of tolerant varieties, when (GA)8YG was used. Sabita was the only exception. The two aus varieties, Nagina22 and FR13A, were separated and grouped with the drought- and flood-tolerant varieties, respectively, but they were together in dendrograms based on other primers. The results show that ISSR markers associated with (GA)8YG delineated the three groups of stress-tolerant varieties from each other and can be used to identify genes/new alleles associated with the three abiotic stresses in rice germplasm.  相似文献   

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