Effects of Bdellovibrio and Like Organisms on Survival and Growth Performance of Juvenile Turbot,Scophthalmus maximus

In this study, the impact of Bdellovibrio and like organisms (BALOs) on juvenile turbot rearing was investigated in a static water rearing system with weekly partial change of water. A 60‐d‐long rearing experiment showed that, compared with control, survival rate, percent weight gain, percent length gain, and average daily growth were 92 ± 2.8%, 387.1 ± 4.6%, 78.6 ± 1.5%, and 1.87 ± 0.79 g/d, respectively, significantly higher than those in the control, viz., 81 ± 3.2%, 248.2 ± 5.3%, 56.7 ± 2.1%, and 1.16 ± 0.68 g/d, respectively. Water quality results demonstrated that no significant difference (P > 0.05) was observed between test and control with the addition of BDW03. Compared with the control, total culturable bacteria and total vibrio numbers in rearing water and in intestines were significantly (P < 0.05) reduced by 0.8–1.4 log CFU/mL/ log CFU/g, with the addition of BDW03. Furthermore, denaturing gradient gel electrophoresis profiles in rearing waters collected at a 1.5‐d interval over a week revealed that BDW03 simplified bacterial community structures with time, and some vibrios disappeared with the addition of BDW03. To the best of our knowledge, this is the first report that BALOs can promote growth and survival of juvenile turbots and be beneficial to coldwater fish aquaculture at the production level.     

育苗播种双向气动控制系统的设计研究

在参照原有的单向穴盘育苗播种机的基础上提出了双向育苗气动作业的思路,设计了一套双向播种的气动控制系统,并完成吸投互替的双向播种过程.设计的适用双向作业的双向育苗播种机结构,是利用传感器采集和D/A转换信号,由单片机控制电磁阀动作来完成双向播种的自动控制过程.同时,对整体系统进行了仿真分析.结果表明,其系统大大提高了生产效率,并为工业化育苗播种提供了一种新的思路.     

Complexity of indica-japonica varietal differentiation in Bangladesh rice landraces revealed by microsatellite markers

To understand the genetic diversity and indica-japonica differentiation in Bangladesh rice varieties, a total of 151 accessions of rice varieties mostly Bangladesh traditional varieties including Aus, Boro, broadcast Aman, transplant Aman and Rayada varietal groups were genotyped using 47 rice nuclear SSRs. As a result, three distinct groups were detected by cluster analysis, corresponding to indica, Aus and japonica rice. Among deepwater rice varieties analyzed some having particular morphological features that mainly corresponded to the japonica varietal group. Some small seeded and aromatic varieties from Bangladesh also corresponded to the japonica varietal group. This research for the first time establishes that the japonica varietal group is a prominent component of traditional varieties in Bangladesh, particularly in deepwater areas.     

新形势下我国农业科研单位科技产业发展的若干思考

文章在分析当前我国农业科研单位科技产业发展面临的新形势基础上,详细阐述了农业科研单位发展科技产业的必要性及存在的问题,并从积极谋划科技产业发展规划、组建国有资产管理公司、加快推进企业兼并重组、加强科企合作、培育新的经济增长点、重视人才的引进和培养等几个方面提出了新形势下促进农业科研单位科技产业发展的措施,以期为全国农业科研单位科技产业发展提供参考。     

鲁棉研27号在黄河流域高产栽培要点

鲁棉研27号是山东省棉花研究中心、中国农业科学院生物技术研究所对鲁613系×GK12的初始系鲁55经多年系统选育而成的品种,是转基因抗虫常规棉,适宜在黄河流域棉区麦田套种.该品种属转基因抗虫常规麦套春棉品种,符合国家棉花品种审定标准并通过审定.     

加强农业科研院所廉政建设的几点思考

近年来，随着中央对“三农”工作的重视，投入的农业科研项目资金越来越大，这对农业科研院所的壮大起到了强有力的推动作用，但随之而来的贪腐行为时有发生，并呈上升趋势。文章就当前农业科研院所廉政建设工作现状及面临的问题，进行了深入分析，并提出了进一步加强廉政建设的工作对策，从而更好地构建廉政建设体系，保证农业科研院所事业又好又快发展。     

小麦醇溶蛋白组分的遗传研究

选取杂交组合(晋麦13×晋农190)通过A-PAGE技术并结合统计分析,分析了单个醇溶蛋白谱带在杂交后代中的遗传规律。醇溶蛋白谱带遗传在F2代表现为:6条谱带的分离(出现/缺失的比率)符合一对基因的分离规律,它们分别是13.9、23.2、26.0、40.2、50.0和71.5;5条谱带的分离符合两对有互补作用的基因的分离规律,它们分别是12.9、15.7、17.8、32.2、76.8,另外有2条谱带的分离符合两对独立基因的分离规律,它们分别是16.5、19.1。     

茉莉花蕾蛆生物学特性及其防治初报

茉莉花是湖南花茶的主要原料,主要产地分布在长沙、攸县等处。七十年代始由盆栽改为露地栽培,并从广东中山等地引进苗木。害虫茉莉花蕾蛆(Contarinia sp.)随着苗     

甜菜坏死黄脉病毒(BNYVV)单克隆抗体研制

 目前,甜菜丛根病(Rhizomania)已成为世界范围内危害甜菜生产的问题。     

菊花上的一种番茄不孕病毒

 菊花上的番茄不孕病毒危害很普遍,1986年我们将菊花上的分离物CB人工接种局部侵染昆诺藜、苋色藜,系统侵染番茄、千日红、心叶烟、珊西烟,在心叶烟上形成耳突及鼠尾叶;在珊西烟上小叶脉坏死,新生叶片沿叶脉坏死或严重皱缩、花叶,在番茄上果实不孕或极少籽粒。