西南地区油菜品种根肿病抗性及布局分析     

黄小琴  张蕾  杨潇湘  伍文宪  周西全  刘勇 《中国农学通报》2020,36(1):122-130

为明确西南地区主栽油菜品种根肿病抗性,以期为合理品种布局提供依据,降低根肿病的危害和损失。结合病圃根肿病菌生理小种鉴定,在四川安县、大邑、广汉三地区,采用病圃自然发病法,对80个油菜品种进行根肿病抗性评价,并对22个品种连续3年进行抗性跟踪。结果表明：三地区病圃根肿菌为存在基因型分化的4号生理小种;供试油菜品种中无免疫根肿病品种,安县、大邑、广汉三地感病品种分别占比88.75%、83.75%、87.50%,其中55个品种在三地区均表现感病,即不适宜在根肿病菌为4号生理小种区域种植;抗性跟踪评价显示不同品种的抗性稳定性存在差异。‘浙油50’、‘油罐罐’适宜安县地区种植,‘黄金荚’、‘金油858’、‘油研9号’、‘种都油998’和‘渝黄4号’适宜大邑地区种植,‘志远油8号’适宜广汉地区种植。‘绵丰油5号’、‘德名油1号’表现抗性丧失趋势;‘丰油精’、‘高油48’抗性不稳定;‘矮架早’抗性完全丧失。  相似文献   

New Polyketides from the Antarctic Fungus Pseudogymnoascus sp. HSX2#-11     

Ting Shi  Yan-Yan Yu  Jia-Jia Dai  Yi-Ting Zhang  Wen-Peng Hu  Li Zheng  Da-Yong Shi 《Marine drugs》2021,19(3)

The species Pseudogymnoascus is known as a psychrophilic pathogenic fungus with a ubiquitous distribution in Antarctica. Meanwhile, the study of its secondary metabolites is infrequent. Systematic research of the metabolites of the fungus Pseudogymnoascus sp. HSX2#-11, guided by the method of molecular networking, led to the isolation of one novel polyketide, pseudophenone A (1), along with six known analogs (2–7). The structure of the new compound was elucidated by extensive spectroscopic investigation and single-crystal X-ray diffraction. Pseudophenone A (1) is a dimer of diphenyl ketone and diphenyl ether, and there is only one analog of 1 to the best of our knowledge. Compounds 1 and 2 exhibited antibacterial activities against a panel of strains. This is the first time to use molecular networking to study the metabolic profiles of Antarctica fungi.  相似文献   

应用响应面优化辣木γ-氨基丁酸富集工艺研究     

段双梅  赵恒  马燕  苏小琴  万晶琼  李振华  张石先  张磊  赵明 《热带作物学报》2017,(2):359-364

通过富集方式和干燥方法的单因素实验,最陡爬坡试验和响应面设计,优化辣木鲜叶γ-氨基丁酸(γ-aminobutyric acid,GABA)的富集工艺。建立的辣木鲜叶中GABA最适富集条件为辣木鲜叶在45℃下,真空处理34 h,然后50℃干燥。该条件处理的辣木GABA含量为(19.70±0.16)mg/g,是对照的2.63倍。  相似文献   

影响当前狂犬病防制的因素及对策     

戴夏友 《中国动物检疫》2004,21(3):33-33

狂犬病是由狂犬病病毒引起的一种古老的人畜共患传染病，除犬和人外，它还可以感染猫、牛、马、羊、猪、狐、狼、蝙蝠等动物，人类常由带毒犬咬伤而感染。人一旦感染狂犬病，死亡率几乎达100％。近年来，我国狂犬病发病数逐年上升。据卫生部2003年7月份发布的消息称，狂犬病已成为我国传染病中  相似文献   

GIS在生态土地分类中的作用     

肖宝英  邵国凡等 《林业研究》2002,13(1):56-60

This paper depicted the physiographic landscape features and natural vegetation situation of study area (the eastern Jilin Province), and expatiates the definition, basic characters and its development of Ecological Land Classification (ELC). Based on the combination of relief map, satellite photography for study area and vegetation inventory data of 480 sample sites, a 5-class and a 15-class ecological land type map was concluded according to 4 important factors including slope, aspect, vegetation and elevation. Ecological Classification System (ECS) is a method to identify, characterize, and map ecosystems. The Ecological Land Type (ELT) was examined and applied initially in eastern Jilin Province. Foundation item: This paper was supported by Chinese Academy of Sciences “100 people” project and the Open Research Station of Changbai Mountain Forest Ecosystem. Biography: XIAO Bao-ying (1974-), female, postgraduate in Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, P. R. China Responsible editor: Zhu Hong  相似文献   

埋地管道新型预应力抗滑桩的应用     

赵晓刚  戴琳  姚兴明  文未荣 《油气储运》2001,20(12):56-57

介绍了埋地输油管道新型预应务抗滑桩的构成和抗滑原理，并对其受力状况进行了分析。以某油加库外滑坡地段埋地输油管道的实际应用为例，表明采用新型预应力锚索抗滑桩保护滑坡地段的埋地输油管道不仅是可行的，而且具有较好的经济性、实用性和可靠性。  相似文献   

湖羊生长性状遗传参数的估测     

徐宁迎  戴旭明  韩玉刚  田丽琴 《浙江大学学报(农业与生命科学版)》1994,(1)

对湖羊生长性状的表型参数和遗传参数的估测表明，性别对这些生长性状有极显著的影响，在遗传参数的估测中剔除性别的效应可提高估计的正确性。初生重、断奶重、三月龄重、六月龄重、周岁重和日增重等性状都属于高遗传力性状，遗传力分别为０．４１９０，０．３０４２．０．６０２３，０．６０７７，０．３９５６和０．６９４５．根据相关分析结果，为提高湖羊的生长速度和肉用性能，把日增重和三月龄重作为主要选择性状，预期可获得较好的效果  相似文献   

AN OBSERVATION STUDY ON BIOLOGICAL CHARACTERS AND MATING BEHAVIOR OF DAHURIAN CASEBEARER(COLEOPHORA DAHURICA FLKV.)ADULTS     

Dai Huaguo Song Xiaoling Nanjing Agricultural University Li Jianlong Northeast Forestry University 《林业研究》1993,(2)

Through rearing tests and observations under laboratory conditions,biologicalcharacters and mating behavior of Dahurian casebearer(Coleophora dahurica Flkv.)adultswere studied in this paper.Results discovered that the time of emergense of male adultswas 24h to 36h earlier than that of female adults.The peak of sex pheromone secretion ofthe female adults appeared of 24h to 42h after the emergence.The reaction of male adultson the sex pheromone was most sensitive during 30h to 48h after emerged,so the earlieremergence of the male adults was favorable to mating.The phenomenon of repeatedmating did not exist in female adults,but the male adults could mate for several times,with maximum of 4 times.There was a definite behavioral reaction during the matingperiod of male and female adults,and the certain period of feeding and mating times couldaffect the adults longervity to a certain degree.  相似文献   

我校举办高等职业技术教育的探索与实践     

倪筱琴  殷德顺 《国家林业局管理干部学院学报》2002,1(1):21-25

充分发挥本科林业院校的学科、资源优势,紧紧把握高等职业技术教育的特点与需求,重点抓好专业设置,始终坚持产、学、研结合,不断深化教学改革,努力探索一条具有林业特色的高等职业技术教育之路.  相似文献   

测定石膏性盐渍土水溶性盐的适宜水土比     

戴祥韵  周斐德 《中国农业大学学报》1990,(1):55-58

土壤水溶性盐的含量与组成随制备浸出液的水土比例不同而异,对含石膏的盐渍土测定结果的影响尤为显著。为了正确反映田间水溶性盐的实际状况,作者进行了三种不同水土比例制备浸出液的对比试验。结果表明,适宜水土比为1:1,其测出的盐分含量与饱和泥浆法按近,且操作简便、快速,在我国一般土化分析实验室均可采用。  相似文献