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1.
为了克隆节节麦中的HMW-GS基因,利用十二烷基硫酸钠聚丙烯酰胺凝胶电泳(SDS-PAGE)分析了节节麦的HMW-GS,发现1种编码序列未知的y-型亚基,即Dy8.1t亚基。通过对目的片段的AS-PCR扩增、克隆、测序和氨基酸序列推导,发现这种未知序列具有典型HMW-GS的序列结构特征。通过与已知亚基序列比较发现,Dy8.1t与Dy10t、Dy10.4t、Dy10.5t和Dy12t在N-端序列有一个氨基酸差别(R-G)。与已知氨基酸序列的HMW-GS多序列比对和系统进化关系分析,证实Dy8.1t亚基是D基因组编码的高分子量谷蛋白y-型亚基家族的新成员。  相似文献   

2.
新疆小麦品种高分子量麦谷蛋白亚基组成分析   总被引:2,自引:3,他引:2  
为全面了解新疆冬、春麦兼种区小麦品种高分子量麦谷蛋白亚基(HMW-GS)组成与分布情况,给优质小麦品种选育提供理论依据,采用十二烷基硫酸钠-聚丙烯酰胺凝胶电泳(SDS-PAGE)方法对360份新疆农家品种、育成品种(系)及国内外引进品种的HMW-GS组成进行了分析.结果表明,新疆小麦品种HMW-GS组成存在广泛变异,亚基类型以2*、Null、7 8和2 12为主,其频率分别为40.0%、35.3%、51.4%和61.9%.此外,还发现了单亚基2和稀有亚基7、21、7* 8、6.1 22、2.2 12,其中2.2 12亚基主要分布在南疆麦区.优质亚基频率偏低是新疆小麦品质差的重要原因.新疆冬、春小麦品种的HMW-GS组成也存在差异,冬小麦品种有17种变异类型,以Null/7 8/2 12为主;春小麦品种有13种变异类型,以2*/7 8/2 12为主.育成品种中1、7 9和5 10亚基(对)的频率较农家品种有很大的提高,其中优质亚基5 10的频率呈明显上升趋势,由农家品种的0增加至2000年以后育成品种的33.9%,说明引进并利用外来优异种质有利于提高新疆小麦品种的加工品质.  相似文献   

3.
为深入了解云南省建国以来普通小麦育成品种(系)的高分子量麦谷蛋白亚基(HMW-GS)组成情况,利用SDS-PAGE电泳技术对152份云南省1950s以来普通小麦育成品种(系)HMW-GS组成和变异进行了分析。结果表明:(1)云南省普通小麦在Glu-A1位点具有N(56.58%)和1(43.42%)2种亚基类型,在Glu-B1位点具有7+8(42.11%)、7+9(34.87%)、6+8(0.66%)、14+15(7.24%)、17+18(13.16%)和13+16(1.97%)6种亚基类型,在Glu-D1位点具有2+10(5.26%)、2+12(54.61%)、5+10(24.34%)和5+12(15.79%)4种亚基类型;(2)云南省普通小麦HMW-GS组合类型比较丰富,共出现27种亚基组合类型,其中"N,7+8,2+12"、"N,7+9,2+12"、"1,7+8,2+12"与"1,7+9,5+10"较多,出现频率分别为20.39%、9.87%、7.89%和7.89%;(3)云南省各个时期育成品种(系)的HMW-GS品质评分基本维持在4.50左右,1990s以后育成的品种(系)中优质亚基5+10出现的频率随普通小麦育成时期的推移而逐渐增加。由此可见,云南省普通小麦的HMW-GS在Glu-A1、Glu-B1、Glu-D1位点上表现出丰富的多态性,共有12种HMWGS等位变异,包括13+16、2+10和5+12三种稀有亚基类型和27种亚基组合类型;对加工品质具有正效应的优质亚基17+18和5+10频率较小,缺乏优质亚基2*。因此,在云南省普通小麦的品质改良中应加强优质亚基2*、17+18和5+10引入及合理应用。  相似文献   

4.
为了解应用高效毛细管电泳(HPCE)技术定量分析优质小麦高分子量谷蛋白亚基(HMW-GS)的效果,利用HPCE技术对13个小麦品种的HMW-GS进行亚基识别和定量分析,并与传统的SDS-PAGE电泳图进行了比较.结果表明,在HPCE电泳图中HMW-GS的亚基出现顺序与SDS-PAGE略有不同,亚基1Ax1早于1Bx7出峰,并且在主亚基之后还有小的亚基出现,尤其是1Dx2主亚基后面有3个小亚基.定量分析表明,优质小麦品种陕627的HMW-GS,不论单个亚基、亚基组合还是亚基总和的含量都高于其他小麦品种,且均达极显著水平.优质小麦品种陕715的HMW-GS含量除亚基1Ax1与陕627接近外,其余亚基和亚基组合都显著低于陕627.西农5211的HMW-GS因为不舍有亚基1Ax1,尽管其他亚基、亚基组合含量接近于陕627,但HMW-GS的总含量显著低于陕627.优质小麦的优质亚基含量较高.HPCE具有高效、灵敏、再现性高等特点,能够快速识别和定量分析小麦HMW-GS,可以为小麦品质育种或组合选择提供参考.  相似文献   

5.
新疆小麦品种及部分引进小麦品种资源的HMW-GS组成与分布   总被引:2,自引:0,他引:2  
为了给新疆小麦品质育种中种质资源的合理利用提供依据,利用SDS-PAGE电泳技术,对66份新疆小麦品种、69份国内引进小麦品种及67份国外引进小麦品种的高分子量麦谷蛋白亚基(HMW-GS)组成情况进行了分析和比较。结果表明,不同来源的小麦品种间HMW-GS变异及亚基组成类型存在较大差异,在新疆材料中,Glu-1位点共检测到11种亚基和10种亚基组合类型;国内引进材料中,Glu-1位点共检测到14种亚基和17种亚基组合类型;国外材料中,Glu-1位点共检测到18种亚基和29种亚基组合类型。但新疆材料中具有优质亚基5 10和14 15的品种(分别占28.5%和1.5%)明显少于国内外材料。这些结果说明新疆材料的遗传亲本基因比较匮乏,而国外材料的亚基变异及亚基组成种类非常丰富,因此新疆在今后的育种中要重视利用具有优质遗传背景的材料,以提高新疆小麦品种优质HMW-GS的分布频率。  相似文献   

6.
为了解黄淮麦区小麦地方品种的遗传多样性,并为品质改良提供基础材料,采用十二烷基硫酸钠-聚丙烯酰胺凝胶电泳(SDS-PAGE)方法,分析了黄淮麦区(黄淮平原副区、汾渭谷地副区)1 389份小麦地方品种的高分子量麦谷蛋白亚基(HMW-GS)的组成.结果表明,在供试材料中,Glu-1位点共有23种等位基因,其中Glu-A1位点3种,Glu-B1位点11种,Glu-D1位点9种,亚基null、7 8、2 12在各自的位点上出现频率最高,分别达到了98.63%、82.83%和92.65%.亚基组成类型共有42种,主要为null/7 8/2 12,频率达75.65%.筛选出一些含有1、2*、13 16、14 15、5 10、5 12等优质亚基的材料,其中有9份材料具有优质亚基组合,可作为优质基因源.同时,还对多个材料具有同一名称的254份材料从HMW-GS组成和农艺性状方面进行了综合分析,最终筛选出了18种共计51份同名材料,分别疑为同种材料,2份白芒糙和2份紫茎白,分别可确定为同一份材料.  相似文献   

7.
黄淮麦区部分小麦种质资源高分子量谷蛋白亚基组成分析   总被引:11,自引:4,他引:7  
为了深入了解黄淮麦区小麦(Triticum aestivum L.)种质资源高分子量麦谷蛋白亚基(HMW-GS)组成情况,为品质育种提供信息,利用SDS-PAGE电泳技术对185份普通小麦材料和5份黑粒小麦共计190份种质材料的HMW-GS组成进行了分析.结果表明这些材料在Glu-A1位点具有2种亚基类型(null,1),Glu-B1位点具有5种亚基类型(7 8,7 9,14 15,6 8,17 18),Glu-D1位点上具有3种亚基类型(2 12,5 10,5 12).对面包加工品质具有正效应的优质亚基14 15出现频率为7.36%,5 10出现频率为34.74%,5 12出现频率为2.63%.对面包烘烤而言,优质亚基组合1/14 15/5 10、1/7 8/5 12和1/7 8/5 10出现频率较低,分别为 0.53%、0.53%和11.58%;适合制作优质手工馒头的亚基组合1/7 8/2 12和null/7 8/2 12出现频率分别为6.32%和19.47%;适合制作优质面条的理想亚基组合1/14 15/2 12出现频率为4.21%,较好的亚基组合共计占23.16%.黄淮麦区的小麦种质资源主要适合面条和馒头专用品种的选育.  相似文献   

8.
甘肃小麦品种(系)HMW-GS遗传变异分析   总被引:4,自引:1,他引:4  
为了了解甘肃省小麦品种HMW-GS的遗传变异和组成,为甘肃优质专用小麦品种筛选和品种改良提供依据,采用SDS-PAGE法,分析了254份甘肃省小麦材料(育成品种(系)和农家品种)Glu-1位点的HMW-GS变异,共检测到22种HMW-GS变异,Glu-A1位点3种,Glu-B1位点11种,Glu-D1位点8种。其中110个育成品种(系)的15种HMW-GS有27种亚基组合类型。Glu-A1位点有2种亚基,47.3%的品种该位点具有优质亚基;Glu-B1位点有7种亚基,76.4%的品种具优质亚基;Glu-D1位点有6种亚基,32.7%的品种具优质亚基。14.5%的品种(n:15)Glu-1位点具优质亚基。144份农家品种的18种HMW-GS共有29种亚基组合形式,Glu-A1位点有3种亚基,Glu-B1位点有9种亚基,Glu-D1位点有6种亚基,无优质亚基组合。  相似文献   

9.
1BL/1RS易位系HMW-GS组成与品质分析   总被引:1,自引:0,他引:1  
为深入挖掘1BL/1RS易位系的品质育种潜力,对收集的300份1BL/1RS易位系的高分子量麦谷蛋白亚基(HMW-GS)组成及其品质性状进行了分析。在300份1BL/1RS易位系 Glu-1位点上共检出12种HMW-GS类型和27种HMW-GS组合,表明这些1BL/1RS易位系具有较高的遗传多样性。在 Glu-A1位点上,亚基Null和1亚基的出现频率分别为47.67%和52.33%; Glu-B1位点有7种等位变异,其中出现频率最高的为7+9亚基对(58.67%); Glu-D1位点有3种等位变异, 2+12亚基对为主要类型,出现频率为71.33%。亚基组合类型中,"Null/7+9/2+12"的出现频率最高(31. 67%)。 Glu-A1、 Glu-B1和 Glu-D1编码优质HMW-GS的比例分别为52.33%、38.34%和16.00%,其中31份1BL/1RS易位系在3个位点均编码优质HMW-GS类型。300份1BL/1RS易位系的品质变异范围较大,有9份材料具有较高的品质育种价值。  相似文献   

10.
黄淮南片小麦高分子量谷蛋白亚基组成及其与品质的关系   总被引:2,自引:0,他引:2  
为了解小麦高分子量谷蛋白亚基(HMW-GS)组成与品质之间的关系,对177份黄淮南片地区小麦品种(系)的HMW-GS组成及其品质进行了检测。结果表明,177份材料在Glu-A1位点上有3种亚基类型(N、1、2*),在Glu-B1位点上有5种亚基类型(7+8、7+9、14+15、17+18、13+16),在Glu-D1位点上有3种亚基类型(2+12、5+10、5+12),1、14+15、5+10亚基的出现频率分别为73.45%、11.86%和48.02%。1、7+8、17+18、5+10亚基对蛋白质含量、湿面筋含量、峰值曲线面积、峰高、SDS沉淀值、8min带高、8min曲线面积、形成时间、稳定时间都具有较大的正向效应。共检测到19种不同的亚基组合类型,其中1/7+8/5+10亚基组合的小麦品种(系)各项品质指标均较优,其次是1/7+8/2+12亚基组合品种(系),N/7+9/2+12和N/14+15/5+10亚基组合类型小麦的品质较差。  相似文献   

11.
The high-molecular weight (HMW) glutenin subunits of bread wheat are major determinants of end-use quality. The objective of this study was to determine the 1Dx and 1Dy subunits present in 43 synthetic hexaploid wheat (SHW) lines derived by crossing durum ‘Langdon’ to 43 Aegilops tauschii accessions. Protein samples were initially electrophoresed multiple times on SDS-PAGE gels to arrange subunits into similar groups and then were electrophoresed on urea/SDS-PAGE gels. Initial results with SDS-PAGE gels indicated that there were six 1Dx and six 1Dy subunits in these SHW lines. However, results of the urea/SDS-PAGE indicated that some of the subunit groups could be further differentiated into additional subunits. A total of eleven 1Dx and eight 1Dy subunits including the newly designated subunits 1Dx2t-1, 1Dx2t-2, 1Dx2t-3, 1Dx1.5t-1, 1Dx2.1t-1, 1Dy10t-1, and 1Dy12t-1 were identified, and they composed 17 1Dx and 1Dy combinations in the SHW lines. Eight of the combinations included at least one novel subunit and hence they were novel Glu-D1 alleles. Our results indicated that urea/SDS-PAGE can be very useful in identifying new HMW glutenin subunits. Quality testing of the SHW lines will determine if any of the alleles are useful in improving wheat-baking quality.  相似文献   

12.
从小麦谷蛋白大聚合体与HMW GS的关系   总被引:1,自引:0,他引:1  
为了探索小麦谷蛋白大聚合体对小麦品质的影响,采用SDSPAGE方法,分析了166个来自不同地区的小麦品种高分子量谷蛋白亚基(HMWGS)的组成,并对不同亚基与小麦谷蛋白大聚合体(GMP)的关系进行了分析。结果表明,所用小麦材料HMWGS的变异类型丰富,但亚基组合仍以N/7+9/2+12为主。HMWGS对面粉GMP含量有显著影响,GluA1位点亚基1>N,GluB1位点亚基13+16>7+9或7+8或14+15或17+18,GluD1位点亚基5+10>2+12,其他亚基差异不显著。说明含亚基1、13+16和5+10的品种能形成较多的GMP。HMWGS评分与面粉GMP含量的相关系数为0.288,达到极显著水平。  相似文献   

13.
The high molecular weight (HMW) glutenin subunits Dtx1.5+Dty10 from Aegilops tauschii are a novel pair of subunits not detected previously in common wheat (Triticum aestivum). The partial DNA sequences of the x-type HMW glutenin alleles from A. tauschii and synthetic hexaploid wheat samples with different HMW glutenin subunits were charcterised. Five samples were found to contain the HMW glutenin subunit Dtx1.5 that may affect bread-making quality. Polymorphisms of the DNA sequences were detected among alleles encoding different HMW glutenin subunits and within an allele encoding the same HMW glutenin subunit, such as the Dtx1.5 subunit. Three single nucleotide polymorphisms (SNPs) that can distinguish the Dxt1.5 from Dtx2, Dtx5, Dx2 and Dx5 alleles were identified. Allelic specific (AS)-PCR primers were developed based the SNPs located at the non-repetitive N-terminal of the HMW glutenin subunits. The AS-PCR primers can accurately identify accessions containing the Dtx1.5 subunit from those containing other studied subunits by PCR analysis, suggesting the usefulness of AS-PCR for identifying different HMW glutenin subunits of A. tauschii and synthetic hexaploid wheat. The AS-PCR primers developed based on SNPs in this study are valuable in wheat breeding for effective selection of special HMW glutenin subunits.  相似文献   

14.
为了证实长发带芒草中的y型高分子量谷蛋白亚基的存在,利用SDS-PAGE分析了3份长发带芒草的高分子量谷蛋白亚基组成,发现其y亚基的迁移率均较普通小麦中迁移率最快的D y12亚基迁移率更快,应用PCR扩增、序列测定及基因编码区体外表达等方法研究了1份材料中的y亚基,确认了长发带芒草比普通小麦中迁移率最快的D y12亚基迁移率更快的T ay亚基的真实存在及表达。研究结果证实带芒草属具有与普通小麦中相类似的y型高分子量谷蛋白亚基。  相似文献   

15.
陕西关中地区部分小麦新品种(系)的HMW-GS组成分析   总被引:1,自引:0,他引:1  
为了解陕西省小麦新品种(系)的HMW-GS组成情况及优质亚基的分布特点,为陕西省小麦品质改良提供参考,利用SDS-PAGE电泳技术对参加陕西省2006~2007年度小麦品种区域试验和预备试验的60份小麦新品种(系)的HMW-GS组成及其品质得分进行了分析。结果表明,在参试的60份小麦新品种(系)中,共出现了13种亚基和16种亚基组合类型。Glu-A1位点的1(60.0%)和Null(36.7%)亚基、Glu-B1位点的7 8(38.3%)、7 9(41.6%)亚基和Glu-D1位点的2 12亚基(73.3%)是主要亚基;优质亚基14 15和5 10的出现频率分别为13.4%和20.0%;亚基组合Null/7 8/2 12和1/7 9/2 12为主要组合类型,其频率都为18.3%,优质亚基组合1/14 15/5 10的出现频率仅为3.3%;出现了一些携带17 18、6 8和20等稀有亚基和少见的亚基组合(如1/6 8/5 10、1/20/5 10和Null/7 9/3 12等)类型的材料。参试材料的HMW-GS品质评分平均7.1分,8分以上的材料有23个,占总材料数的38.3%。说明陕西省近年新育成的小麦新品种(系)Glu-1位点的遗传基础有所改善,但仍不太理想。在品质育种上,应加强优质亚基种质材料的引进、筛选与利用,同时加强优质亚基的聚合育种。  相似文献   

16.
A large collection of accessions of the wild wheat progenitor Triticum tauschii, the donor of the D genome of Triticum aestivum, was evaluated for the variability of high molecular weight (Mr) glutenin subunits by electrophoretic and chromatographic methods. A large range of allelic variation at theGlu-Dt1 locus was found in this collection and some novel subunits were observed in both x- and y-type glutenin subunits, including x- or y-type null forms. A few accessions showed three bands in the high Mrglutenin subunit region. However, only two subunits were observed when monomeric proteins were removed before SDS-PAGE analysis of polymeric proteins. The presence of monomeric proteins in this region is discussed. Characterisation of these subunits was also carried out by reversed phase-high performance liquid chromatography (RP-HPLC). Very different surface hydrophobicities were observed between x- and y-type subunits and in some cases it was possible to identify glutenin subunits with the same apparent molecular weight but different surface hydrophobicity. Differences in elution times that were detected when the same subunit was either reduced or reduced and alkylated were related to the number of cysteine residues present in each glutenin subunit. The newGlu-Dt1 glutenin subunits have the potential to enhance the genetic variability available for improving the quality of bread wheat (T. aestivum).  相似文献   

17.
The x- and y-type high molecular weight (HMW) glutenin subunits are conserved seed storage proteins in wheat and related species. Here we describe investigations on the HMW glutenin subunits from several Pseudoroegneria accessions. The electrophoretic mobilities of the HMW glutenin subunits from Pd. stipifolia, Pd. tauri and Pd. strigosa were much faster than those of orthologous wheat subunits, indicating that their protein size may be smaller than that of wheat subunits. The coding sequence of the Glu-1St1 subunit (encoded by the Pseudoroegneria stipifolia accession PI325181) was isolated, and found to represent the native open reading frame (ORF) by in vitro expression. The deduced amino acid sequence of Glu-1St1 matched with that determined from the native subunit by mass spectrometric analysis. The domain organization in Glu-1St1 showed high similarity with that of typical HMW glutenin subunits. However, Glu-1St1 exhibited several distinct characteristics. First, the length of its repetitive domain was substantially smaller than that of conventional subunits, which explains its much faster electrophoretic mobility in SDS-PAGE. Second, although the N-terminal domain of Glu-1St1 resembled that of y-type subunit, its C-terminal domain was more similar to that of x-type subunit. Third, the N- and C-terminal domains of Glu-1St1 shared conserved features with those of barley D-hordein, but the repeat motifs and the organization of its repetitive domain were more similar to those of HMW glutenin subunits than to D-hordein. We conclude that Glu-1St1 is a novel variant of HMW glutenin subunits. The analysis of Glu-1St1 may provide new insight into the evolution of HMW glutenin subunits in Triticeae species.  相似文献   

18.
为了了解贵州小麦品质育种状况,利用SDS-PAGE技术分析了50份省内外小麦品种(系)高分子量麦谷蛋白亚基(HMW-GS)的遗传组成情况.并进行亚基品质评分。结果表明,贵州省内品种Glu-1位点具有丰富的遗传变异.共检测到12种亚基和14种亚基组合类型;贵州省内材料HMW-GS品质评分较低.平均只有4.07分,而省外品种平均为5.33分.主要原因是省内外材料Glu-D1位点的优劣亚基分布频率差异较大,省内材料中优质亚基5 10的出现频率只有14.3%.而评分最低的2 12亚基的出现频率却高达85.7%,省外材料中5 10亚基和2 12亚基均以40%的频率出现;贵州小麦育种还需在品质方面加强优质亚基的利用。  相似文献   

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