Solvent retention capacity and swelling index of glutenin in hard red wheat flour as possible indicators of rheological and baking quality characteristics

To overcome the cost and expense of milling and baking hundreds of samples in wheat breeding programs, cereal chemists have developed various rapid predictive tests for end-use quality assessment. In this study, five small-scale rapid tests, including Solvent Retention Capacity (SRC) and Swelling Index of Glutenin (SIG), were compared for viability and accuracy to determine end-use quality using small quantities of flour. The tests were applied on commercial hard red spring and hard red winter wheat cultivars from two of the three main production regions in South Africa. Rheological and bread-baking characteristics were related to results of the rapid tests. Highly significant cultivar differences were seen for all rheological and baking-related characteristics, and SRC and SIG parameters, with a strong genotype effect. The environment effect was also highly significant across regions, especially for flour protein content (FPC), which affected the rheological and baking-related characteristics differently across the regions. Correlations among SRC, SIG, rheological, and baking quality-related parameters were highly significant, but inconsistent for the two production regions. Only lactic acid SRC and SIG correlated consistently with the rheological and baking quality-related characteristics in both production regions.     

ASP技术在"中国茶主题网关"建设中的应用

介绍了网站信息资源组织的新模式--主题网关的概念与特征;介绍了ASP技术的相关概念;并以中国茶主题网关建设为例,介绍了ASP技术在主题网关建设中的应用.     

TDW清管器过球指示器的改进及应用效果

概述了TDW清管器过球指示器的工作原理,对清管器在实际运行中出现的问题进行了分析,对清管器过球指示器进行了技术改进。改进后的过球指示器有效解决了误报警问题,提高了操作人员对清管器运行的判断能力,大大降低了收球操作的风险。     

小麦谷蛋白膨胀指数与其他品质性状的多元回归和通径分析

[目的]研究小麦谷蛋白膨胀指数(SIG)与小麦品质性状的关系。[方法]利用小麦京771和Pm97034杂交产生的重组自交系(RIL)群体,对SIG与8个品质性状的关系进行数量遗传分析。[结果]相关分析表明:除膨胀势和蛋白质含量外,SIG值与Zeleny沉淀值、面筋指数、湿面筋含量、谷蛋白大聚合体(GMP)含量等性状值都达到极显著的正相关,其中与Zeleny沉淀值的相关系数最大(r=0.783,P<0.01),而与碱性水保持力(AWRC)和籽粒硬度呈极显著和显著的负相关性;多元线性回归分析表明:湿面筋含量、Zeleny沉淀值、膨胀势、AWRC、籽粒硬度、蛋白质含量等6个性状值与SIG值有较强的线性关系,建立了回归方程;通径分析表明:Zeleny沉淀值对SIG值的直接影响最大,湿面筋含量和膨胀势对SIG值的间接影响较大。[结论]该研究为小麦品质育种研究提供了必要的理论依据。     

ASP技术在“中国茶主题网关”建设中的应用

介绍了网站信息资源组织的新模式——主题网关的概念与特征;介绍了ASP技术的相关概念;并以中国茶主题网关建设为例,介绍了ASP技术在主题网关建设中的应用。     

小麦谷蛋白膨胀指数与品质及产量性状的关系

利用小麦京771和Pm 97034杂交后代重组自交系(R IL)群体,对小麦谷蛋白膨胀指数(Sw ellingIndex of G luten in,S IG)在R IL群体中的分离和分布规律及其与几个品质性状和产量性状的相关性进行了研究。结果表明,S IG值的分布呈连续的正态分布;S IG值在R IL群体中的遗传方式表现为略倾高亲遗传,超高亲优势非常显著。S IG值与Zeleny沉淀值、GM P含量、膨胀势及面筋指数呈极显著正相关(r分别为0.75、0.39、0.27和0.68,P<0.01),与干、湿面筋含量的相关不显著(r分别为0.01、0.03),但与碱性水保持力(AW RC)呈显著的负相关(r=-0.13,P<0.05);在与产量构成因素的相关分析中,S IG值与株高和千粒重呈极显著的负相关(r分别为-0.20-、0.25,P<0.01),而与其它产量构成因素呈不显著的正相关关系。偏相关分析表明,当Zeleny沉淀值作为控制变量时,S IG值与其它品质性状和产量因素间的相关系数都有所降低。S IG值与干、湿面筋含量间的相关由不显著的正相关变为极显著的负相关(r分别为-0.20和-0.23,P<0.01),而与株高和千粒重的极显著负相关关系变为不显著的负相关关系(r分别为-0.04和-0.14)。