【摘 要】
:
Three hundred and eleven honeybee samples from 12 countries in the Middle East and North Africa (MENA) (Jordan,Lebanon,Syria,Iraq,Egypt,Libya,Tunisia,Algeria,Mo
【机 构】
:
Bee Research Department, National Center for Agriculture Research and Extension, Baq’a, Jordan“,”Dep
论文部分内容阅读
Three hundred and eleven honeybee samples from 12 countries in the Middle East and North Africa (MENA) (Jordan,Lebanon,Syria,Iraq,Egypt,Libya,Tunisia,Algeria,Morocco,Yemen,Palestine,and Sudan) were analyzed for the presence of deformed wing virus (DWV).The prevalence of DWV throughout the MENA region was pervasive,but variable.The highest prevalence was found in Lebanon and Syria,with prevalence dropping in Palestine,Jordan,and Egypt before increasing slightly moving westwards to Algeria and Morocco Phylogenetic analysis of a 194 nucleotide section of the DWV Lp gene did not identify any significant phylogenetic resolution among the samples,although the sequences did show consistent regional clustering,including an interesting geographic gradient from Morocco through North Africa to Jordan and Syria.The sequences revealed several clear variability hotspots in the deduced amino acid sequence,which furthermore showed some pattes of regional identity.Furthermore,the sequence variants from the Middle East and North Africa appear more numerous and diverse than those from Europe.
其他文献
目前,随着西瓜生产的产业化、专一化和规模化发展,西瓜连作障碍问题日趋严重。近年来主要是采用嫁接栽培来减轻连作障碍。而对于嫁接西瓜化感效应的研究未见报道。本实验采用
Paratransgenesis targeting the gut protozoa is being developed as an alteative method for the control of the Formosan subterranean termite (FST).This method inv
胃癌是危害国民身体健康的重大疾病之一,每年新发胃癌病例约40万,死亡人数约30万例,居恶性肿瘤第3位[1]。多数胃癌患者初诊时即为局部晚期或存在远处转移,失去手术机会,即使
高粱制种田的后期管理高粱制种田,母本花期授粉结束后,就应该进入后期的管理工作。一、割除小株、弱株和未授粉株由于制种田的植株密度较大,通风透光相对较差,尤其到后期日照时数
阿月浑子(Pistacia vera L.)分布于地中海区、美洲和亚洲(中亚和小亚细亚)各个国家。在我国分布于温带和亚热带地区。阿月浑子是漆树科阿月浑子属,雌雄异株落叶乔木,树高可达
Although ants are an ecologically dominant and extensively studied faunal group throughout the tropics,there is a poor understanding of tropical ant diversity a
中花117系中国农科院油料作物研究所用(鄂花4号×台山三粒肉)F_1×(鄂花3号×协抗青)F_经复式杂交育成的。 1987—1989年经长江流域的三年多点区试结果,平均亩产237.7公斤,
Cannibalism,or intraspecific predation,can play a major role in changing individual fitness and population processes.In insects,cannibalism frequently occurs ac
定州市科协于1986年选育的农家花生良种“80天还家”,经过6年定点试验示范,已在20多个村推广,暂定名为夏播花生“早熟1号”。其特点是:1.生长期短,成熟早,适合小麦收获后夏