中国叶蜂属两新种(膜翅目,叶蜂科)

记述中国叶蜂科Tenthredinidae叶蜂属Tenthredo2新种,三斑槌腹叶蜂Tenthredo trixanthomacula Wei et Yan,sp.nov.和褐跗短角叶蜂Tenthredo rubitarsalitia W ei et Xu,sp.nov.。前者隶属于槌腹种团T.formosana group,后者隶属于短角种团T.potanini group。新种模式标本保存于中南林业科技大学昆虫系统与进化生物学实验室昆虫模式标本室(CSCS)。     

中国叶蜂属(膜翅目,叶蜂科)三新种

记述采自中国河南、陕西、浙江的叶蜂科叶蜂亚科叶蜂属3新种:吕氏横斑叶蜂Tenthredo lunani Wei et Niu,sp.nov.,三斑槌腹叶蜂Tenthredo dolichomisca Wei et Niu,sp.nov.,黑腰白端叶蜂Tenthredo pararubiapicilina Wei et Niu,sp.nov.。新种模式标本保存于湖南长沙中南林业科技大学昆虫模式标本室。     

中国叶蜂属(膜翅目,叶蜂科)两新种

记述中国叶蜂科叶蜂属2新种:平突翠绿叶蜂Tenthredo flatotrunca Wei et Hu,sp.nov.和角斑长突叶蜂Tenthredo triangulimacula Wei et Hu,sp.nov..前者属于叶蜂属翠绿叶蜂种团Tenthredo trunca group,后者属于叶蜂属长突叶蜂种团Tenthredo triangulifera group.简要讨论了翠绿叶蜂种团和长突叶蜂种团的特征与种类分布状况.提供了长突叶蜂种团分种检索表.新种模式标本保存于湖南长沙中南林业科技大学昆虫模式标本室.     

中国叶蜂属(膜翅目,叶蜂科)二新种

记述中国叶蜂科叶蜂属Tenthredo subflava种团2新种:宽齿平绿叶蜂T.latidentella Wei et Zhao,sp.nov.和双斑平绿叶蜂T.flatoscutellania Wei et Niu,sp.nov..编制了T.     

TWO NEW SPECIES OF TENTHREDO (HYMENOPTERA,TENTHREDINIDAE) FROM CHINA

记述中国叶蜂科Tenthredinidae叶蜂属Tenthredo2新种,三斑槌腹叶蜂Tenthredo trixanthomacula Wei et Yan,sp.nov.和褐跗短角叶蜂Tenthredo rubitarsalitia Wei et Xu,sp.nov..前者隶属于槌腹种团Tformosana group,后者隶属于短角种团T.potanini group.新种模式标本保存于中南林业科技大学昆虫系统与进化生物学实验室昆虫模式标本室(CSCS).     

中国叶蜂属(膜翅目,叶蜂科)OBSOLETA-MESOMELA种团二新种

记述采自中国境内叶蜂属obsoleta-mesomela种团2新种:粗纹窄突叶蜂Tenthredo paraobsoleta Wei et Liu,sp.nov.和粗纹低突叶蜂Tenthredo pseudomesomela Wei et Li,sp.nov..前者属于obsoleta亚种团,后者属于mesomela亚种团.新种模式标本保存于湖南长沙中南林业科技大学昆虫模式标本室.     

中国叶蜂属双带种团(膜翅目,叶蜂科)二新种和二新纪录种及一新异名

简要讨论了叶蜂科叶蜂属双带种团的分类状况、主要识别特征及其与近缘种团的区别.记述双带种团2新种:绿柄双带叶蜂Tenthredo pseudoformorsula Wei et Shang,sp.nov.和短顶双带叶蜂Tenthredo transversiverticina Wei et Shang,sp.nov..蓝光双带叶蜂 Tenthredo melanosternum Saini&Vasu,1999和角斑双带叶蜂Tenthredo segrega Konow,1908是中国新纪录种.建立1个新异名关系:Tenthredo eburata Konow,1900=Tenthredo rubrocaudata Takeuchi,1936,syn.nov..     

中国叶蜂属(膜翅目,叶蜂科)斑翅种团一新种

在叶蜂属内建立斑翅种团,简要讨论了该种团识别要点以及已知种类分布,编制了斑翅种团已知种分种检索表,记述中国叶蜂属斑翅种团1新种,横带斑翅叶蜂Tenthredo transversa Wei et Shang,sp.nov..     

中国三节叶蜂属三新种(膜翅目,三节叶蜂科)

记述中国三节叶蜂属3新种:显著斑钳三节叶蜂Arge distincta Wei et Zhang,sp.nov.,红胫斑钳三节叶蜂Arge rufotibiella Wei et Zhang,sp.nov.和细角斑钳三节叶蜂drge tenuicornis Wei et Zhang,sp.nov..3新种与Argemarginellia Wei,2002以及Arge basifusca Malaise,1947构成三节叶蜂属1新种团marginellia种团.编制了marginellia种团已知种类检索表.新种模式标本保存于中南林业科技大学昆虫模式标本室.     

海南叶蜂补充记录附记中国蔡氏叶蜂属一新种(膜翅目:叶蜂总科)

记述采自中国海南省的叶蜂7属8种,其中分附顺角叶蜂Tenthredo malimilova Wei,2004和台湾钩瓣叶蜂Macrophya formosana Rohwer,1916是海南省新记录,华氏狭背叶蜂Ametastegia huai Wei et Nie,2002的雌虫为首次描述。记述叶蜂科平背叶蜂亚科1新种——黑跗蔡氏叶蜂Caiina nigritarsis Wei,sp．nov．。     

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.