蓝粒小麦育种衍生材料染色体的C带检测

本研究应用改良的C-带技术,对供试蓝粒小麦衍生后代11个株系共94个单株进行了分析检测,结果表明:94个单株中有25个单株检测到了长穗偃麦草的4 Ag染色体,导入率为26.60％.本研究结果可为蓝粒小麦育种后代的选育提供理论参考.     

实施贵州食物保障工程问题研究

为了加快贵州农业发展,落实中央和贵州省委关于加快社会主义新农村建设的精神,稳定确保农村人口粮食基本自给,逐步提高贵州省食物自给水平,本文依照“大粮食”的理念,就实施食物保障工程问题进行探讨,重点探究粮食、肉类、果蔬等食物生产发展问题,为构建社会主义和谐社会,加快贵州新农村建设提出相应的对策建议。1贵州食物供需分析1.1食物生产现状分析食物的概念是广泛的,包括人类可以摄食以吸取营养的可食之物。“大粮食”包括各种禾谷类作物及小杂粮、薯类作物、畜禽产品、水产品、果蔬产品、油料作物、糖料作物、木本粮油、食用菌,以及各…     

新型种业体系下中国种企的发展之路

<种子法>颁布实施后,我国种业市场面临着从传统的种子购销渠道向开放的市场渠道转化,其间国营种子公司与民营、合资种子公司共同竞争的市场机制已经形成.分析这种新型种业市场体系种业发展应注意的几个问题,有助于我国大部分国营、民营种子公司强化自己的核心竞争优势,以期掌握竞争的主动权.     

Molecular mapping for seedling cold tolerance QTLs in rice

The quantitative trait loci(QTLs)for cold tolerance relative characters were identified with microsatellite markers.Ten QTLs located on chromosome1,3,4,5,6,8,9,11(two)and 12were detected for seedling height at different low temperature.Only 2 of these were detected at the same locus at four environments.1 was significant at three environments.6 were significant at two environments and 1 was significant at one environment.Seven QTLs located on chromosome 1(two),2(two),5,6,8were found for ow temperature chlorosis resistance and five QTLs located on chromosome 3,4,7,8,11resistant to chilling injury.The amount of variation explained by indivdual QTL ranged from 4.85%to 49.34%,There was no linkage relationship among the three characters.which indicates seediling cold tolerance is a complex character and is controlled by different QTLs.     

苹果树腐烂病侵染来源的研究

将苹果、梨、山楂、桃、杏、杨树腐烂病病原菌的培养性状、产孢条件和数量、分生孢子器及分生孢子的大小进行比较，种间存在明显差异。交互接种试验表明，苹果壳囊孢（ＣｙｔｏｓｐｏｒａｓＰ．）能够侵染苹果、梨、山楂、桃、杏、杨树枝条，接种发病率为５％～１００％；梨壳囊孢（Ｃ．ｃａｒｐｈｈｏｓｐｅｒｍａ）、山楂壳囊孢（Ｃ．ｏｘｙａｃａｎｔｈａｅ）、核果壳羹孢（Ｃ．ｌｅｕｃｏｓｔｏｍａ）—桃和杏树的分离物均能够侵染苹果枝条，接种发病率为６０％～１００％；金黄壳囊孢（Ｃ．ｃｈｒｙｓｏｐｅｒｍａ）虽然不能侵染苹果枝条，但是苹果壳囊孢（Ｃｙｔｏｓｐｏｒａｓｐ．）能够侵染杨树枝条，接种发病率为１００％。因此，６种树木上的腐烂病菌均可成为苹果树腐烂病的侵染来源。     

Study on Melting Rate of Pre reducted Pellet in Smelting Reduction Reactor

The successive approaching and rapid cooling method is applied to determine the terminal point of melting,the melting rate of pre reducted pellet is carefully measured.Various factors influencing melting rate are studied via orthogonal experiment,and the influences of main factors are carefully studied via the single factor experiment.The apparent activation energy is expounded and calculated.     

阴雨对早稻开花及受精结实的影响

 利用人工模拟阴雨条件在抽穗扬花期对491个早稻品种进行了试验，并在自然阴雨条件下观察了39个品种的表现。在阴雨条件下，水稻开花率、受精率和结实率均明显降低。降雨主要造成开花率和受精率的大幅度下降，遮荫则使退化颖花和批粒增加。相同处理的不同品种之间差异很大，其中以闭花受精品种类型对阴雨适应性最强。并将水稻品种对阴雨的适应性分为5种类型。