共查询到19条相似文献，搜索用时 171 毫秒
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为了解安徽省淮北及黄淮麦区的小麦加工品质,以52个安徽省小麦产业体系展示品种为材料,分析了供试小麦品种HMW-GS的组成和分布、谷蛋白聚合体(GMP)含量、小麦蛋白质含量、Zeleny沉降值及湿面筋含量。结果表明,52个供试小麦品种的HMW-GS变异类型众多,共发现13种变异类型,包含6种优质亚基类型;共出现了21种HMW-GS组合。按照GMP、蛋白质、湿面筋含量及Zeleny沉降值可将52个供试品种分为4类。供试品种的品质评分介于4~10分之间,平均7.4分。基因位点Glu-A1含有1亚基的品种,GMP含量高于含有Null亚基的品种。 相似文献
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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
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甘肃省冬小麦农家品种与改良品种的HMW-GS变异及品质效应比较 总被引：3，自引：0，他引：3
为了解甘肃冬小麦农家品种和改良品种HMW-GS变异及品质效应,为小麦品质改良和亲本选用提供依据,采用SDS-PAGE法和近红外反射光谱法检测340份品种的HMW-GS和其中252份的沉淀值、蛋白质和湿面筋含量.结果表明,340份品种在Glu-1位点共有14种亚基变异,34种亚基组合形式.Glu-A1位点共有3种变异,亚基缺失(null)的频率最高,1和2*亚基出现的频率改良品种(36.9%)比农家品种(12.0%)高;Glu-B1位点共有7种变异,7+8亚基出现的频率最高,改良品种比农家品种降低36.1个百分点;Glu-D1位点有4种亚基变异,2+12亚基出现频率最高,改良品种比农家品种降低11个百分点,5+10亚基的频率改良品种较农家品种提高17.6个百分点.含5+12亚基的农家品种及含14+15亚基的改良品种综合品质较优.从供试改良品种中筛选出在2个以上基因位点具有优质亚基的品种46个,其中10个品种在3个位点上都具有优质亚基. 相似文献
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体细胞无性系变异遗传特性分析 总被引：1，自引：0，他引：1
通过9份无性系变异体后代的性状相关和广义遗传力分析以及68份体细胞无性系R_1、R_2、R_3的株高、抽穗期变异分析表明:R_2、R_3代的性状变异水平明显低于R_1;R_2和R_3代保持R_1变异水平的无性系比例很低。通过体细胞培养容易获得微效变异,而获得大变异的频率很低。体细胞无性系变异R_3的多数性状遗传力较高。综合分析表明:对优良无性系变异体的选择R_2代便可开始,R_3代便已趋稳定。相对于其它手段创造的变异,体细胞无性系变异有一定的优越性,也存在局限性。 相似文献
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玉米O2和Wx基因内及O16基因连锁SSR位点的等位变异研究 总被引：1，自引：0，他引：1
以13个o2o2基因型的高赖氨酸玉米自交系、3个o16o16基因型的高赖氨酸玉米自交系、13个wxwx基因型的糯玉米自交系和8个普通玉米自交系为材料,用3个02基因内SSR标记(umc1066、phi057和phi112)、2个与o16基因连锁的SSR标记(umc1141和umc1121)和2个wx基因内SSR标记(phi027和phi061)检测上述材料的基因组DNA,了解3个基因内共7个SSR位点的等位变异情况.结果表明,7个SSR位点均有丰富的等位变异,这些变异可导致o2o2与O2O2基因型、o16o16与O16O16基因型间子粒赖氨酸含量的差异以及wxwx与WxWx基因型间糯性的差异. 相似文献
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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
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以13个o2o2基因型的高赖氨酸玉米自交系、3个o16o16基因型的高赖氨酸玉米自交系、13个wxwx基因型的糯玉米自交系和8个普通玉米自交系为材料,用3个o2基因内SSR标记(umc1066、phi057和phil12)、2个与o16基因连锁的SSR标记(umc1141和umc1121)和2个wx基因内SSR标记(phi027和phi061)检测上述材料的基因组DNA,了解3个基因内共7个SSR位点的等位变异情况。结果表明,7个SSR位点均有丰富的等位变异,这些变异可导致o2o2与O2O2基因型、o16o16与O16O16基因型间子粒赖氨酸含量的差异以及wxwx与WxWx基因型间糯性的差异。 相似文献
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为了解甘肃小麦地方品种资源HMW-GS的遗传组成及品质效应,检测了340份品种的HMW-GS和其中250份品种的沉淀值、蛋白质和湿面筋含量.结果表明,甘肃小麦地方品种资源Glu-1位点有21种亚基变异,冬、春小麦资源均以null(87.9%和77.4%)、7+8(93.2%和88.7%)和2+12(82.1%和76.7%)为各自位点的优势亚基;有42种亚基组合形式,冬、春小麦资源均以null/7+8/2+12为优势组合(分别占67.1%和56.4%).甘肃小麦地方品种资源中5+10和5+12亚基频率高于国内已报道小麦地方资源.春小麦地方品种1、7+8和5+10亚基在各自位点的品质效应值最高,冬小麦地方品种2*、7+8、5+12亚基在各自位点的品质效应值最高.从供试材料中筛选出在2个以上基因位点具有优质亚基的地方小麦品种48份,其中14份在3个位点都具有优质亚基. 相似文献
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为探究陕西关中地区小麦HMW-GS亚基与品质性状间的关系,采用SDS-PAGE法对57份陕西关中地区小麦品种（系）HMW-GS亚基组成及相关品质性状进行了分析。结果表明,供试品种（系）中共检测出7种HMW-GS亚基类型和8种HMW-GS亚基组合;Glu-A1位点上有3种亚基类型,分别为1、2*和Null,以1亚基为主（78.95%）;Glu-B1位点上检测到7+8（61.40%）与7+9（38.60%）两个类型;Glu-D1位点上检测到5+10（70.18%）和2+12（29.82%）两个类型。3个HMW-GS基因位点编码亚基共组成8种亚基组合,品质得分6～10分,其中1/7+8/5+10组合品质得分10分,出现频率最高。就HMW-GS不同位点对品质性状效应进行分析发现,Glu-D1位点对b*值、形成时间、稳定时间、弱化度和粉质质量指数的影响达到极显著水平（P＜0.01）;对面团流变学特性的影响,Glu-D1>Glu-B1。不同类型亚基对小麦品质的效应存在差异,7+8亚基对蛋白质含量、湿面筋含量和容重具有正效应,7+9和5+10亚基对形成时间和稳定时间的影响显著高于其他亚基（P＜0.05）;携带1/7+8/5+10亚基组合小麦的蛋白质、湿面筋含量和容重最高;携带1/7+9/5+10亚基组合具有较高面粉L*值和面团流变学特性指标值。 相似文献
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为探讨甲基磺酸乙酯(ethyl methane sulfonate,EMS)诱变在小麦品质育种中的价值,了解EMS诱变小麦籽粒品质变异状况,筛选优良的变异材料,对1667份西昌69的EMS诱变系M 6代籽粒的蛋白质含量、淀粉含量、面筋含量、容重、面团形成时间和稳定时间等多个籽粒性状进行了测定,初步分析了诱变系的品质变化,并通过SDS-PAGE电泳法及高效液相色谱技术分析了其籽粒高分子量麦谷蛋白亚基(HMW-GS)的组分和不溶性蛋白聚合体的含量。共筛选到101份HMW-GS变异诱变系,分别为亚基缺失、亚基增生、亚基置换和亚基缺失且置换4种变异类型。其中,有28份诱变系的蛋白质含量、面筋含量、形成时间、稳定时间等多个籽粒品质性状及不溶性蛋白聚合体含量优于亲本,且千粒重相对稳定,可以作为优质种质资源用于小麦品质育种。 相似文献
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Relationships between dough strength,polymeric protein quantity and composition for diverse durum wheat genotypes 总被引：1，自引：0，他引：1
N.M. Edwards M.C. Gianibelli T.N. McCaig J.M. Clarke N.P. Ames O.R. Larroque J.E. Dexter 《Journal of Cereal Science》2007
Five different Glu-B1 HMW-GS patterns were identified among a collection of diverse durum wheat genotypes grown in 2001 in two locations in western Canada. The durum wheat lines exhibited a wide range of dough and gluten strength characteristics as measured by alveograph and 2 g mixograph parameters, gluten index (GI), and protein composition as measured by unextractable polymeric protein (UPP) content and the ratio of high-molecular weight (HMW) glutenin subunits (GS) to low-molecular weight (LMW) GS. HMW-GS subunits patterns represented within the genotypes were 6+8, 7+8, 7+16, 14+15 and 20. Two of the genotypes expressed Glu-A1 HMW-GS 2* in combination with other HMW-GS. Approximately 95% of the durum genotypes were γ-gliadin 45 types. Analysis of variance indicated that genotype was a greater source of variation in all measurements than was growing location, with the exception of protein content which showed less variation contributed by genotype and more contributed by location than for other quality parameters. UPP was strongly associated with all strength measurements. All of the γ-gliadin 42 types were low in UPP and weak. Among the γ-gliadin 45 types, those possessing HMW-GS 20 were typically in the lower half of the UPP and strength range. There was no clear evidence of an association between any of the other HMW-GS patterns and gluten strength. The majority exhibited HMW to LMW-GS ratios that were within the relatively narrow range of 0.15–0.25, yet there were wide variations in dough strength among genotypes within that range. Increasing proportions of HMW-GS resulting in ratios of greater than 0.30 were generally associated with weak dough and gluten and low UPP content. 相似文献
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Yong Zhang Jianwei Tang Jun Yan Yelun Zhang Yan Zhang Xianchun Xia Zhonghu He 《Journal of Cereal Science》2009,50(2):219-226
One hundred and sixty-eight F6 recombinant inbred lines (RILs) derived from Chinese wheat cultivars, PH82-2 and Neixiang188, were used to determine the cumulative effects of HMW-GS and LMW-GS composition and quantity of gluten protein fractions on dough mixograph properties. A wide range of variation for all parameters in the RILs was detected. Major gene loci of HMW-GS were associated with variation in mixograph characters, but accounted for no more than 25.3% of the phenotypic variations. Glu-D1, together with Glu-B3, played the most important role in determining the properties. Additive effects of HMW-GS and LMW-GS showed major contributions to most of the variation of mixograph parameters, and epistatic effects were also important and could be counter to additive effects of individual loci. The quantity of gluten protein fractions, especially the quantity of glutenin, LMW-GS, and Glu-B3, showed highly significant correlations with most of the quality parameters, but the correlation coefficients were influenced by grain hardness, protein content, or both. Protein quality could be greatly improved through increasing the quantity of glutenin, while holding desirable composition of HMW-GS and LMW-GS alleles, with an appropriate ratio of quantity of glutenin to gliadin. 相似文献
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The bread wheat elasticity, which is very important for bread-making quality, is largely determined by the composition of high-molecular-weight glutenin subunits (HMW-GS). The HMW-GS encoded by Glu-B1 loci are highly polymorphic and the combinations 17+18 and 14+15 are good for bread making. Thus it is very important to identify the alleles at Glu-B1 loci for wheat quality improvement. In this study, the five common HMW-GS types encoded by Glu-B1x locus carried by 18 Chinese bread wheat cultivars (or lines) were analyzed by SDS-PAGE. Two pairs of PCR primers which could distinguish the Glu-Blx alleles of the five common HMW-GS types were designed based on the Glu-B1x gene sequences (Reddy and Appels, 1993; Genbank accession: X13927; Genbank accession:AY367771). 22 recombinant inbred lines (RILs) derived from Jing711 (contains 17 subunit on Glu-B1x) and Pm97034 (contains 14 subunit on Glu-B1x) were used to validate the accuracy of the primers, which showed that the two specific markers could be used together to distinguish alleles at Glu-B1x locus and accelerate wheat quality breeding by marker assisted selection. 相似文献
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为了解甘肃省近20年育成的106份冬小麦品种(系)中加工品质性状相关基因分布情况,用22个分子标记对供试材料的HMW-GS、LMW-GS、面粉色泽及籽粒硬度等品质性状相关基因进行了分析。结果发现,供试品种(系)的HMW-GS相关基因中,在Glu-A1位点检测到34份品种(系)含有AxNull,频率为32.08%;在Glu-B1位点检测到Bx7+By8和Bx14+By15共2种基因组合,分别占17.92%和25.47%;在Glu-D1位点检测到11份品种(系)含有Dx5+Dy10,占10.38%。对LMW-GS鉴定结果显示,29份品种(系)含Glu-A3d基因,分布频率为27.36%。HMW-GS和LMW-GS亚基组合中,含有4个、3个和2个位点优质亚基基因组合的品种(系)分别占0.94%、8.49%和3.77%。对面粉色泽相关基因Ppo-A1、Ppo-D1、Psy-A1、Lox-B1和TaPod-A1位点的检测发现,优异等位变异占比分别为39.62%、50.94%、31.13%、30.19%和38.68%。对籽粒硬度相关基因检测发现,在Pina、Pinb和Pinb-2等位变异位点的检测... 相似文献
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Effect of genetic variation on phenolic acid and policosanol contents of Pegaso wheat lines 总被引：1，自引：0，他引：1
Total phenolic acid and policosanol contents and compositions of bran from an Italian bread wheat variety Pegaso and its 11 near-isogenic lines were measured. The near-isogenic wheat lines differed at one or more loci coding for storage proteins. The genetic variation included deletions, additions and/or combinations of variations. Almost 95% or more of phenolic acids were in the bound form. Ferulic acid was the predominant bound phenolic acid present in wheat bran samples. Other phenolic acids were p-coumaric, vanillic and syringic acids. Tetracosanol, docosanol, hexacosanol, octacosanol, tricosanol and heneicosanol were found as major policosanol compounds in their decreasing order. Highly significant genotypic differences were observed in total phenolic acid and policosanol concentrations. None of the genetic lines had higher phenolic acid contents than the parent line Pegaso, whereas some of the lines had more policosanol levels. In general, both total phenolic acid composition and contents were higher with genetic lines that varied at Glu-1 loci with 2+Dy high molecular weight glutenin subunit (HMW-GS) (Pegaso 184), variation at Gli-D2 loci (Pegaso 219) and single null A1 (variation at Gli-1/Glu-3 loci; Pegaso 30). Highest total policosanol content was observed with the double null at Glu-A1/Glu-D1 loci (Pegaso 236). These findings may lead to new opportunities for wheat breeders and eventually commercial wheat growers to promote the production of wheat with enhanced levels of health beneficial compounds. 相似文献
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为了培育高赖氨酸含量的小麦新材料,利用基因枪转化法将辣椒高赖氨酸蛋白Cflr基因导入到小麦品种扬麦16中,轰击了2 500枚小麦幼胚,获得抗除草剂Basta的再生植株176株(遗传转化采用的筛选标记基因为bar基因),经PCR鉴定Cflr基因阳性的转基因植株为23株.T1代幼苗喷洒130 mg·L-1的Basra溶液进行除草剂抗性鉴定,发现T1代幼苗的除草剂抗性出现了分离.PCR-Southern杂交进一步证明外源高赖氨酸蛋白基因Cflr基因已经整合到小麦的基因组中.通过种子赖氨酸含量和总蛋白质含量的测定,发现75.00％的转基因株系的赖氨酸含量高于受体扬麦16,77.78％的转基因株系的蛋白质含量高于受体扬麦16.本试验获得了一批赖氨酸含量提高的小麦转基因株系,这些高赖氨酸含量的转基因株系可进一步用于小麦高赖氨酸分子育种研究. 相似文献
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为了探索小麦不溶性谷蛋白(IG)含量与品质的关系,对176份不同筋力小麦材料的IG含量、HMW-GS组成类型和加工品质参数进行了检测及相关性分析。结果表明,供试材料的平均IG含量为2.44%,变化范围为1.25%～3.71%。共检测到10种HMW-GS亚基类型和16种亚基组合,其中,出现频率较高亚基类型是1(76.13%)、7+9(61.37%)、2+12(51.70%)和5+10(48.30%),出现频率较高亚基组合是1/7+9/2+12(25.57%)和1/7+9/5+10(22.16%)。亚基类型与IG含量显著相关,其中,优质亚基1、7+8和5+10比同位点的其他等位变异均显著增加IG含量,亚基组合1/7+8/5+10的IG含量最高,N/14+15/5+10的IG含量最低。IG含量与蛋白质含量、吸水率和稳定时间均呈显著正相关。IG含量可以作为小麦品质育种的快速有效检测指标。 相似文献