2-乙酰基-4-丁酰基间苯三酚对棉花立枯病、小麦白粉病的防治效果

2-乙酰基-4-丁酰基间苯三酚是以2,4-二乙酰基间苯三酚为先导化合物经过结构改造筛选得到的高活性化合物之一。田间小区试验结果表明,2-乙酰基-4-丁酰基间苯三酚对棉花立枯病和小麦白粉病具有较好的防治效果,按种子重量1%的可湿性粉剂拌种处理对棉花立枯病的防效达56.76%,200 mg/L浓度下对小麦白粉病的防治效果达41.8%。     

Studies of Multi-Allelic Polymorphism of Dominant Dwarfing Genes in Wheat

Dwarfing breeding of wheat in the world is confined to the exploitation of recessive dwarfing sources. None of the dominant dwarfing sources discovered in common wheat (Triticum aestivum L. ) has found wide exploitation in wheat breeding due to the extreme dwarfness of their plants (20 -55 cm). We found in our work that some stable mutant lines with their plant height enhanced to different extents could be obtained in large populations derived from the stock seeds of the dominant dwarfing sources Aibian1 carrying Rht10 on 4DS and being 20 - 55 cm tall and Aisu2 carrying Rht3 on 4BS and being 55 cm tall, or from their descendants of induced mutation treatments, or from the segregating descendants of their crosses with mid- or tall-statured genotypes. Subsequently, we studied these mutation-derived lines differing in plant height with near isogenic lines and observed that the character of their enhanced plant height bred true, each carrying a semidominant dwarfing gene for a definite height and that as the plant height of the mutation-derived lines increased, the yield-contributing characters of their near isogenic lines were significantly improved. When test crosses with marker genes and physiological and biochemical genetic marker tests were performed to re-localize the semi-dominant dwarfing genes carried by the mutation-derived lines, it was confirmed that they shared common loci with Rht10 and Rht3 and that they were all mutation-derived multiple alleles. It is thus speculated that dominant dwarfing genes are of "multi-allelic polymorphism". In other words, dominant dwarfing genes, which are ultra-dwarfing, are liable to develop by mutation into a group of multiple alleles with plant height enhanced to different extents and some may have a height close to the ideal plant height for wheat breeding. Therefore, these results offer a fundamentally new approach for the exploitation of dominant dwarfing sources in wheat breeding.     

香料烟新品种"巴斯玛一号"介绍

“巴斯玛一号”品种为云南省“优质香料烟新品种选育”课题组采用系统选育方法选出的一个综合性状较好的新品种。该品种1997年3月从保山罗明坝所栽的克撒锡巴斯玛大田中选出变异单株后经系统选育而成。2000年至2001年冬春季进入云南省烟草品种区试,同年开始进行示范种植,在多年     

初探甘肃省三北防护林体系建设工程信息化管理系统

在简单介绍三北工程信息化管理系统开发现状的基础上，对信息化管理系统开发的步骤、层次及系统结构进行了论述，为制定和完善各项工程建设、规划、设计，制定相关的方针政策以及技术措施提供科学的依据。     

银杏叶类胡萝卜素的研究

银杏叶和提取黄酮(GBE)生产过程中的废弃物含有的类胡萝卜素主要为叶黄素、紫堇新质、隐黄质、新黄质和其他胡萝卜素,是天然的着色剂,如能加以利用,是银杏产业资源综合利用和循环经济发展的途径之一。     

平阳县节水水平分析及对策探讨

提出了一套较通用且简单的地区节水水平分析方法。通过对浙江省平阳县用水与节水现状的调查分析，用该方法评价了其节水水平,并定量估算了该县的节水潜力，据此进一步地提出了各行业的节水对策，为平阳县科学制定节水目标和相关政策提供参考。     

作物发育模型生理参数的QTL定位与应用研究初报--以大麦品系的生育期预测为例

研究试验应用作物模型与QTL定位的互补作用，对作物发育模型的生理参数作QTL定位分析，使作物发育的预测直接建立在单个遗传基因QTL的基础之上。以大麦两个亲本及其94个自交纯系(RIL)的感光性试验为依据，确定了播种一出穗期间对应的发育模型的4个参数值，再对这些参数值的QTL在遗传图上的位置及其加性效应进行了估算。并以基于QTL效应的模型对RIL群体在不同环境条件(两年播期试验)下的发育期进行预测。     

湖羊及其杂交后代中双羔羔羊断奶期的生长发育研究

采用SAS8．2的GLM过程和ttest过程对同期出生、不同杂交组合方式的290头 湖羊杂交后代的体重和日增重进行分析。结果表明,不同杂交组合方式对子一代初出生重和二 月龄断奶重都有显著提高,但只有三元杂交对二月龄日增重有显著影响。不同杂交组合间,美 利奴×夏洛来×湖羊组合效果最好,与其它三组都有显著差异。     

商洛茶业发展中存在的问题和对策

商洛已有300多年的种茶历史,已经发展到0.853万hm2,是我国最北部的茶区,具备生产优质名茶的区位优势;但由于缺乏统一规划、品种混杂,投资少、规模小、产量低、品牌少、技术落后,使得综合效益较低;因此商洛茶叶未来的生产中必须注意适地适树、统一规划;强化市场意识,扩大生产规模;调整茶业结构,实施品牌战略;加大投资力度,规范管理体制。把茶业作为解决区域“三农”问题的突破口,最终实现区域自然-经济-社会协调发展。     

利用BrdU在CEF(TK~ )细胞中筛选TK~-重组鸡痘病毒

将新城疫病毒 (NDV)四平株 HN基因 ,插入不含报告基因、以 TK为侧翼的鸡痘病毒表达载体 p UTA- 2中的复合启动子下游 ,获得重组表达质粒 p UTA- 2 HN。将重组表达质粒转染鸡痘病毒 (FPV)感染的鸡胚成纤维细胞 (CEF) ,培养、收获病毒后 ,用含 40 m g/ L 5 -溴 - 2 -脱氧尿嘧啶 (Brd U )的培养液 ,在 CEF(TK )细胞中筛选培养 2代 ,然后用不含 Brd U的培养液进行病毒蚀斑纯化 ,成功筛选出表达 NDV HN蛋白的 TK-重组鸡痘病毒