中国拱茧蜂属(膜翅目,茧蜂科,小腹茧蜂亚科)一新种记述

简述了拱茧蜂属Fornicia Brullé研究的历史沿革、中国的研究现状、属征及世界分布等,描述了1新种:长角拱茧蜂Fornicia longiantententenna sp.nov.,与其相似种作了比较.模式标本存放贵州师范大学地理与生物科学学院.     

中国茧蜂亚科一新属一新种(膜翅目,茧蜂科)

记述茧蜂亚科1新属1新种,即阔鞘茧蜂属Platybracon gen.nov.和中华阔鞘茧蜂 Platybracon sinicus sp.nov..文中对新属及新种进行了详细的描述,并附有鉴别形态特征图,新属与其近似属作了比较.模式标本存放于福建农林大学益虫研究室.     

长柄茧蜂属两新种(膜翅目:茧蜂科:优茧蜂亚科)

长柄茧蜂属隶优茧蜂亚科(Euphorinae),全世界已知35种,非洲16种、美洲3种、欧洲4种(包括苏联立陶宛北部1种)、分布在欧洲和澳渊的1种亚洲11种。在亚洲的11种中,中国9种,日本1种,分布在中国和日本的1种。本文增加两新种,分布湖南和广西。模式模本存湖南长沙湖南农学晚昆虫学教研室标本室。     

蝽茧蜂属一新种(膜翅目:茧蜂科,优茧蜂亚科)

在整理陕西茧蜂标本时,发现蝽茧蜂属一种经鉴定一个新种。现记述如下。模式标本保存在陕西师范大学生物系无脊椎动物学标本室。 紫阳蝽茧蜂Aridelus ziyangensis新种 雄 体黑色。体长3.2毫米。头部黑色,背面观横形,其宽度为长度的2倍(图1)。无后头脊。额及头顶布满粗刻点及浓密银白色细毛,颊部刻点和细毛较稀疏。复眼黑褐色。额中央纵脊粗而低,不呈薄片状。两个幕骨陷之间的距离与幕骨陷至复眼之间的距     

云南省绒茧蜂一新种(膜翅目:茧蜂科:小腹茧蜂亚科)

著者检查云南省茧蜂科标本时,发现一新种,报道如下。模式标本保存在湖南农学院昆虫学教研组标本室。     

绒茧蜂属一新种(膜翅目:茧蜂科)

鉴定苇田的绒茧蜂标本时,发现一新种,报道如下。 芦螟绒茧蜂,新种Apanteles chilo lateelli sp.nov.(图1—4)     

竞茧蜂属的研究(膜翅目:茧蜂科)

本文共发表了Zele属九个新种,每种皆加以简明的记述。文内并附有检索表。1.黄跗竞茧蜂 Zele helvitarsis,新种(图1-4) 本种的区别点是:并胸腹节有网状脊起(网紧密);第一背骨片细,气门位于基部1/3处;翅脉与翅前缘分离,最近处为其宽度的6倍。2.黑竞茧蜂Zele nigra,新种(图5-8)     

中国热茧蜂属一新种记述(膜翅目:茧蜂科:茧蜂亚科)

热茧蜂属TropobraconCameron是1个小型属,过去全世界已知5种。本文报道了我国发现的1个新种——黑热茧蜂T.niger,sp.nov.,并建立了该属中国已知3种的分种检索表。新种模式标本保存于福建农林大学植物保护学院益虫研究室。黑热茧蜂Tropobraconniger,新种(图1～8)本新种与三化螟热茧蜂TropobraconluteusCameron,1905较接近,但前者的1)后翅1-SC R脉宽度明显比1r-m脉窄(图1);2)头部光滑,后头强度凹入(图8);3)中胸盾片中前方无1条短沟(图6);4)体大多黑色,头部及胸部部分红褐色;5)复眼长为上颊长的1.8倍(图8),颚眼距长为上颚基宽的2.3倍(图3)等特征可与之区别。正模:♀,福建沙县洋坊,1981-Ⅺ-17,黄居昌采;副模:3♀♀,同正模。     

长柄茧蜂属一新种(膜翅目:茧蜂科)

大峪长柄茧蜂Streblocera dayuensis,新种 雌性:体褐黄色。头部褐黄色,单眼区有黑褐色斑;触角基部8节褐黄色,其余各节灰褐色。前胸背板淡褐黄色,中脑背板及小盾片黄褐色,后胸背板及并胸腹节暗褐色;足黄色;翅透明,前缘脉及翅痣下缘为浅烟褐色;腹柄节赤褐色;第二腹节背板褐黄色,以后各腹节烟褐色。     

Recent advances in the study of Kaposi's sarcoma-associated herpesvirus replication and pathogenesis

It has now been over twenty years since a novel herpesviral genome was identified in Kaposi's sarcoma biopsies. Since then, the cumulative research effort by molecular biologists, virologists, clinicians, and epidemiologists alike has led to the extensive characterization of this tumor virus, Kaposi's sarcoma-associated herpesvirus(KSHV; also known as human herpesvirus 8(HHV-8)), and its associated diseases. Here we review the current knowledge of KSHV biology and pathogenesis, with a particular emphasis on new and exciting advances in the field of epigenetics. We also discuss the development and practicality of various cell culture and animal model systems to study KSHV replication and pathogenesis.     

The structure, reproduction and taxonomy of Vidalia and Osmundaria (Rhodophyta, Rhodomelaceae)

Comprises species occurring mostly in subtidal habitats in tropical, subtropical and warm-temperate areas of the world. An analysis of the type species, V. spiralis (Sonder) Lamouroux ex J. Agardh, a species from Australia, establishes basic characters for distinguishing species in the genus. These characters are (1) branching patterns of thalli, (2) flat blades that may be spiralled on their axis, (3) width of the blade, (4) primary or secondary derivation of sterile and fertile branchlets and (5) position of sterile and fertile branchlets on the thalli. Application of the latter two characters provides an important basic method for separation of species into three major groups. Osmundaria , a genus known only in southern Australia, was studied in relation to Vidalia , and its separation from the Vidalia assemblage is not accepted. Species of Vidalia therefore are transferred to the older genus name, Osmundaria. Two new species, Osmundaria papenfussii and Osmundaria oliveae are described from Natal. Confusion in the usage of the epithet, Vidalia fimbriala Brown ex Turner has been clarified, and Vidalia gregaria Falkenberg, described as an epiphyte on Osmundaria pro/ifera Lamouroux, is revealed to be young branches of the host, Osmundaria prolifera.     

New or rare chromosome counts in Artemisia L. (Asteraceae, Anthemideae) and related genera from Kazakhstan

Fifteen chromosome counts of six Artemisia taxa and one species of each of the genera Brachanthemum, Hippolytia, Kaschgaria, Lepidolopsis and Turaniphytum are reported from Kazakhstan. Three of them are new reports, two are not consistent with previous counts and the remainder are confirmations of very scarce (one to four) earlier records. All the populations studied have the same basic chromosome number, x = 9, with ploidy levels ranging from 2x to 6x. Some correlations between ploidy level, morphological characters and distribution are noted.     

肝癌中HBV和HCV基因和抗原的分布及意义

采用原位分子杂交方法检测HCV RNA及HBV X基因;采用免疫组织化学方法研究HCV核心抗原,非结构区C33c抗原及HBxAg在肝细胞肝癌中的定位及分布.结果表明(1)HCV RNA、HBV X基因在肝细胞肝癌组织检出率分别为40%(55/136)和82%(112/136).HCV RNA定位于癌细胞的胞浆内,阳性细胞呈散在、灶状及弥漫分布三种形式;HBV X基因在肝癌细胞中的分布呈胞浆型、核型及核浆型,阳性细胞也呈上述三种分布形式;(2)HCV C33c抗原、核心抗原在肝细胞肝癌中的阳性率为81%(133/164)及86%(141/164).C33c抗原定位于癌细胞及肝细胞的胞浆内;核心抗原既定位于癌细胞核中,又可定位于胞浆中.C33c抗原阳性细胞以灶状分布为主;而核心抗原阳性细     

Selection with two alleles and complete dominance

For a plant selection model with frequency-independent viabilities, fertilities and selfing rates, it is shown that apart from global fixation, for certain parameter combinations a protected polymorphism and facultative fixation (either allele may become fixed according to initial frequencies) may both occur. Facultative fixation requires different selling rates for the dominant and recessive type. Protection of the polymorphism requires resource allocation for male and female function. In this connection the problem of purely genetically caused population extinction is discussed.
For general frequency dependence and regular segregation, the chances for establishment of a completely recessive gene are compared to those of a completely dominant gene. It is proven that the process of establishment of the recessive gene, despite a fitness advantage, may be considerably endangered by drift effects if random mating prevails. The recessive gene may reach the same effectivity in establishment as a dominant gene, only if the recessive homozygote mates exclusively with its own type during the period of establishment.