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301份小麦种质醇溶蛋白遗传多样性及其与品质性状的相关性分析 总被引:2,自引:0,他引:2
为探讨小麦醇溶蛋白的遗传多样性及其亚基对品质性状的影响,利用酸性聚丙烯酰胺凝胶电泳(A-PAGE)技术对不同来源的301份小麦品种(系)的醇溶蛋白组成进行分析。结果表明,301份材料共分离出93种不同迁移率的谱带,其中迁移率为58.6、69.4、72.1、16.5和19.2的谱带出现频率最高(均高于80.0%),其余谱带的多态性相对较高。品种间遗传相似系数(GS)的变异范围为0.538~1.000,平均为0.759,中原008和中育1401的亲缘关系最近(GS值为1.0)。在GS=0.740水平上,将所有材料划分为11个类群。相关分析表明,42条谱带与106项次品质性状呈显著或极显著相关,其中谱带ω25.5、γ43.7和γ48.2可显著增加面团稳定时间、面筋指数;谱带γ52.2和α80.7可显著增加粗蛋白及干、湿面筋含量;谱带β59.2可显著提高小麦粉色泽L*值,但与b*值负相关;谱带ω34.8、ω36.6和ω39.3对面团稳定时间及面筋指数具有显著的负向效应。这些重要的醇溶蛋白谱带可作为小麦品质育种的选择标记。 相似文献
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采用酸性聚丙烯酰胺凝胶电泳(A-PAGE)和SDS-聚丙烯酰胺凝胶电泳(SDS-PAGE),分析了30个山东省种植面积较大且具有部分代表性的普通小麦品种的低分子量麦谷蛋白亚基(LMW-GS)和醇溶蛋白组成,测定了30个品种的蛋白质含量、沉淀值、面团形成时间、稳定性、粉质评价值、最大拉伸阻力和拉伸曲线面积等面粉或面团主要品质性状,分析了低分子量谷蛋白亚基和醇溶蛋白组成与面条小麦品质性状的关系.结果表明,拥有LMW-2/γ-45组合的小麦品种,其面条小麦品质性状明显优于含LMW-1和γ-42组合的小麦品种,可作为面条小麦品种筛选的生化指标,这为进一步发现新的优质种质资源提供了新的途径.为小麦品质育种提供了重要参考. 相似文献
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小麦醇溶蛋白和谷蛋白亚基的高效毛细管电泳分离研究 总被引:5,自引:0,他引:5
初步探讨了小麦醇溶蛋白和低分子量谷蛋白亚基(LMW-GS)高效毛细管电泳(HPCE)分离的分辨芳及其重复性。结果显示:利用碱性硼酸钠缓冲液系统及一个改进的毛细管冲洗程序分离麦醇溶蛋白,可获得较高的分辨度和重要性。通常在30min内一个品种较易分离出40个左右醇溶蛋白组分,而且重复分离之间峰迁移时间和峰高的平均相对标准偏差(RSD)可分别保持在0.2%和4%左右。利用pH2.5酸性磷酸缓冲液(含20 相似文献
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小麦醇溶蛋白是谷朊粉的主要成分之一,用小麦醇溶蛋白包埋白藜芦醇以达到稳定白藜芦醇的目的。用反溶剂法制得其自组装纳米粒子,对乙醇浓度、蛋白浓度、分散液pH、分散液盐浓度等因素对纳米粒子的粒径以及Zeta电位的影响做出了探究。发现在乙醇浓度为65%,蛋白质浓度4%,分散液pH为4.5,分散液盐浓度为0.00 mol/L时,得到理想的纳米粒子,其粒径约为(185.1±8.5)nm,Zeta电位为(19.36±1.03)m V。而后在最佳条件下用小麦醇溶蛋白纳米粒子负载白藜芦醇,发现该复合物在芯壁比为1∶40时包埋率最高,此时粒径(166.7±3.7)nm,Zeta电位(15.68±0.74)m V,包埋率为55.0%,载药率为1.5%。小麦醇溶蛋白纳米粒子可以用来稳定白藜芦醇。 相似文献
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本文通过研究玉米醇溶蛋白(Zein)、nisin和EDTA组合的Zein涂膜液的抑菌作用,及Zein涂膜章鱼烧保质期内微生物、TVB-N值和感官品质的变化,分析Zein涂膜对章鱼烧的保鲜效果。Nisin或Nisin-EDTA显著提高Zein涂膜液的菌抑制性,4℃的冷藏条件下,在18 d的贮藏过程中组合nisin或nisin-EDTA的Zein涂膜液涂膜处理章鱼烧样品的微生物总数升高值均低于1 log cfu/g,而对照章鱼烧样品微生物总数升高值高于3 log cfu/g;Zein涂膜处理显著性的抑制了章鱼烧的TVB-N值的升高、水分损失和冷藏过程中感官品质的劣变(p0.05),在4℃冷藏条件下,Zein涂膜可以将高品质章鱼烧货架期延长至12 d,复配有nisin或nisin-EDTA的Zein涂膜可以将高品质章鱼烧货架期延至第18 d。Zein涂膜能可作为改进章鱼烧生产工艺的技术参考。 相似文献
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The relationship between HMW glutenin subunit composition and the bread-making quality of British-grown wheat varieties 总被引:5,自引:0,他引:5
Peter I. Payne Mark A. Nightingale Anatole F. Krattiger Linda M. Holt 《Journal of the science of food and agriculture》1987,40(1):51-65
Based on previous work, which related individual HMW glutenin subunits to bread-making quality by genetical analysis, quality scores were assigned to each of the commonly occurring subunits. The grain proteins of 84 home-grown wheat varieties were fractionated by SDS—PAGE to determine their HMW glutenin subunit composition. The quality scores of each of the subunits were summed to create a Glu-1 quality score for each variety. The results indicated that 47-60% of the variation in the independently established bread-making qualities of this set of varieties could be accounted for by variation in HMW subunits of glutenin. The presence or absence in the varieties of a translocated chromosome, which consisted of the long arm of 1B and the short arm of 1R from rye, was also established because of its known association with poor bread-making quality. A correction factor was applied to the Glu-1 quality score of those varieties that contained the 1 BLURS chromosome. The variations in the rye-adjusted Glu-1 quality scores were compared with those of the bread-making qualities of the varieties, and the proportion of variation in quality accounted for was raised to 55-67%. The Glu-1 quality score and the biscuit-making qualities of the same set of varieties were negatively related. The results are discussed in relation to future strategies recommended to wheat breeders for developing new varieties with improved bread-making quality. 相似文献
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Angiotensin I‐converting enzyme (ACE) inhibitory peptide was isolated from wheat gliadin hydrolysate prepared with acid protease. Consecutive purification methods were used for peptide isolation including ion‐exchange chromatography, size‐exclusion chromatography, and reverse‐phase high‐performance liquid chromatography. The amino acid sequence of this peptide was identified as Ile‐Ala‐Pro, and the ACE inhibitory activity (IC50 value) was 2.7 μM . The hypotensive activity of Ile‐Ala‐Pro on spontaneously hypertensive rats was investigated. This peptide inhibited the hypertensive activity of angiotensin I with intravenous injection, and decreased the blood pressure significantly with intraperitoneal administration. 相似文献
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本研究应用国内研制开发的TCBD - 1型蛋白质分离检测仪 ,测定啤酒中蛋白质含量及分布 ,分析蛋白质含量与分布和啤酒的营养性、非生物稳定性、泡沫性能和风味等品质的相关性。对啤酒生产企业提高啤酒品质具有参考价值。 相似文献
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以高筋小麦粉为材料,通过分离重组的方法,将小麦中醇溶蛋白、谷蛋白和淀粉分离成单体,然后按所需条件进行重组配比,分析不同醇溶蛋白与谷蛋白配比重组面粉对面筋蛋白二级结构、面团热特性和流变学特性及速冻水饺品质的影响。结果表明:随着醇谷比的增加(01,13,11,31,10,g/g),重组体系的α-螺旋和β-转角含量逐渐下降,β-折叠含量逐渐上升,热变性温度和焓值逐渐上升,弹性模量和黏性模量逐渐下降,流变损耗角tanδ逐渐上升。当重组体系中醇谷比为11(g/g)时,制作的速冻水饺的感官得分最高为87.27。该条件下的速冻水饺冻后形态完好、无裂纹、表面光滑,煮后外观颜色均一、完好无损、爽口不黏牙,有韧性和咬劲,饺子汤清晰、透明、无浑浊。 相似文献
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