单粒活体稻谷种子直链淀粉含量的近红外透射光谱分析

利用FOSS Tecator公司的Infratec 1255型带单粒定标器的近红外谷物分析仪,对222粒单粒稻谷进行扫描并测定了直链淀粉含量的参比数据。借助于功能强大的近红外定标器软件(WinISI),采用多种计量数学处理方法和不同的回归统计方法进行定标曲线的开发和比较,优化得到了单粒水稻种子直链淀粉含量测定的近红外定标方程。其定标标准偏差（SEC）、交叉检验标准误差（SECV）、检验工作标准误差（SEP）和定标相关系数（RSQ）分别为2.828、3.088、2.792、0.848。     

PCR一步法检测水稻蜡质基因第一内含子剪接供体+1位碱基

 报道了一种利用PCR快速检测水稻蜡质基因第一内含子剪接供体+1位碱基的方法，并用这种方法分析了一批广东籼稻材料。结果显示，该方法简便易行，结果可靠，可广泛用于育种筛选中的直链淀粉含量选择。     

一套研究水稻抗瘟性材料体系的建立和应用

 以中国华南地区曾普遍使用的抗瘟性水稻材料外选 35、目前广东省水稻生产上种植面积最大的具有水平抗瘟性和高收获指数特点的水稻品种粤香占和广东最早的优质食味好的品种七丝占为亲本材料 ,通过杂交后代单粒传递方法和DNA杂交方法 ,创造了一套对抗瘟性基因及抗性机理和优质等农艺性状研究具有重要价值的材料体系 ,分别为重组自交系群体 (recombinationinbredline ,RIL)、扩展重组自交系群体 (expendrecombinationinbredline ,ERIL)和突变体重组自交系群体 (transfered mutantrecombinationinbredline,TRIL)。在RIL群体中 ,鉴定出该材料体系中对鉴定稻瘟病菌株的各种抗性基因组合材料 ,为“基因对基因学说”提供了直接的材料证据。用同一对照和同样方法 ,在ERIL群体中 ,肯定了表现水平抗性的粤香占具有多个主效抗性基因和多个微效抗性基因 ,为水平抗性的多基因控制提供了初步证据。还创造出了一套可用于研究水平抗性的稳定材料群体。用野生稻外源DNA电激导入方法获得粤香占水平抗性突变为垂直抗性的突变株 ,并从简单重复序列多态性 (SSLP)方面 ,证明了突变体群体的变异情况。这些研究和材料体系为抗瘟性机理研究、基因克隆、抗性基因尤其是水平抗性基因研究提供了重要的新材料     

醇溶蛋白对大米淀粉粘滞性和质构性的影响

利用快速粘度分析仪和质构仪测定了添加醇溶蛋白的大米淀粉、3个大米品种米粉和去除醇溶蛋白后米粉的粘滞特性和质构特性.结果显示：添加醇溶蛋白的大米淀粉的粘滞谱崩解值显著增大,而淀粉凝胶的硬度、胶粘性和粘附性显著减小;去除醇溶蛋白后米粉的峰值粘度、崩解值和最终粘度都显著增大,凝胶的硬度和粘附性也显著增大.在去除醇溶蛋白的米粉中重新加入醇溶蛋白,与原米粉的RVA谱比较显示,差异不显著;醇溶蛋白对淀粉的黏滞特性和质构特性有显著影响.     

乡村振兴背景下饲料产业对农业经济的发展路径分析——评《农业经济管理》

<正>“乡村振兴”是我国21世纪的重大战略之一，启动乡村振兴战略的根本目的是促进城乡一体化发展，既让农业转型为朝阳产业，也让农民成为有希望的职业，更让农村成为安居乐业的家园。从农业经济角度出发，乡村振兴战略的实施关键是产业振兴，而乡村社会中产业振兴的最优途径是在现有农业生产的基础上进行拓展创新，一方面保留并继承农业种植的基本优势，     

蛋白质中二硫键对稻米淀粉黏滞性的影响

在6个不同品种的稻米粉中添加二硫苏糖醇以打破米粉中蛋白质的二硫键,用快速粘度分析仪测定淀粉的黏滞谱,研究稻米中蛋白质二硫键对稻米黏滞性的影响。结果显示,样品中添加DTT（二硫苏糖醇）后,糊化温度降低,糯稻的峰值粘度下降,其他样品的峰值粘度上升,而消减值极显著降低。蛋白质影响米饭的蒸煮食味品质,可能是二硫键结合形成的蛋白质网络的变化引起稻米吸水性改变而起作用。     

水稻收获指数相关性状的研究

广东省农科院水稻研究所育成的水稻品种粤香占在9 000 kg/hm2的条件下收获指数达到0.6以上,比普通品种提高约0.1.以粤香占为材料、七丝占(收获指数为0.4)为对照进行水稻收获指数相关性状研究,结果表明:获得高收获指数不是仅靠增加单株产量,而要在增加单株产量的同时适当增加抽穗前植株高度使茎叶重达到一定的程度,同时使始穗期后物质运输主要贡献在穗部,而非茎长增量;收获指数遗传力极低,表现为典型的数量性状特点,各收获指数有关性状间关系十分复杂,茎长增量、始穗株高和成熟株高也许可作为间接影响收获指数的要素.     

稻米蛋白质的研究进展

综述了国内外有关稻米蛋白质的分子结构、遗传机制、变化机理以及影响蛋白的环境因素、稻米蛋白质研究中常用的测定和提取方法的研究概况，提出目前在高蛋白质含量水稻品种的选育上存在的主要问题及育种新法，为水稻品质育种提供参考。     

水稻稻瘟病抗性基因研究综述

In this paPer，authors gave the review of research progress in rice blast resistance genes．Number of genes conferring rice blast，widely used resistant materials to blast and method of rice blast identification have been summaried in details．The strategies of rice blast resistance breeding are also discussed．     

水稻稻瘟病抗性基因研究综述

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