中国平颜三节叶蜂属分类研究(膜翅目: 三节叶蜂科)

记述了膜翅目三节叶蜂科平颜三节叶蜂属Aprosthema Konow 3新种: 双斑平颜三节叶蜂Aprosthema bimaculata Wei et Wen sp. Nov., 黑背平颜三节叶蜂Aprosthema nigroscutis Wei et Wen sp. Nov. 和天目平颜三节叶蜂Aprosthema tianmunica Wei et Wen sp. Nov..新种模式标本均保存在中南林学院资源与环境学院模式昆虫标本室.     

中国三节叶蜂属(膜翅目,三节叶蜂科)一新种及Arge xanthogaster种团东亚种类检索表(英文)

记述采自记述中国三节叶蜂科三节叶蜂属1新种:白尾晴腹三节叶蜂Arge albocaudalica Wei,Yan et He.sp.nov..本种与Arge xanthogaster (Cameron,1876)很相似,但腹部黑褐色,端部2节背板和锯鞘黄白色;后翅臀窒柄短于后翅M室长,锯鞘背面观内侧切口很小,深度明显短于锯鞘侧叶端部宽;锯腹片14刃,第2节缝最长粗刺毛约等长于锯节宽度的3/4,节缝粗毛每节约9个,第8节缝最长粗刺毛等宽于该处锯节宽.定义了Arge xanthogaster种团,编制了该种团东亚地区已知种类检索表.     

中国叶蜂亚科二新种(膜翅目,叶蜂科)

记述中国叶蜂亚科2新种:孙氏金蓝叶蜂Metallopeus sunae Wei et Zhang,sp.nov.和光额横带叶蜂 Tenthredo nitidifrontalia Wei et Zhang,sp.nov.前者隶属于金蓝叶蜂属Metallopeus Malaise,1934,后者隶属于叶蜂属Tenthredo Linnaeus,1758的横带叶蜂种团T.pompilina group.金蓝叶蜂属的分布纪录向北延伸约10个纬度.     

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。     

中国蕨叶蜂亚科三新种(膜翅目,叶蜂科)

记述中国蕨叶蜂亚科3新种:美斑长片叶蜂Neothrinax formosula Wei et Xiao,sp.nov,.糙眶侧齿叶蜂Neostromboceros punctiorbita Wei et Xiao,sp.nov和.周氏侧齿叶蜂Neostromboceros zhousyi Wei et Liu,sp.nov。.     

中国大基叶蜂亚科三新种(膜翅目,叶蜂科)

记述中国大基叶蜂亚科3新种:宽斑大基叶蜂Beleses latimaculatus Wei et Niu,sp.nov.,黑毛大基叶蜂Beleses nigropilosus Wei et Niu,sp.nov.和黄褐凹跗叶蜂Eusunoxa fulvitarsis Wei et Xue,sp.nov.。     

中国三节叶蜂属一新种(膜翅目,三节叶蜂科)

记述中国三节叶蜂科三节叶蜂属1新种,长颊黑毛三节叶蜂Arge dolichogenata Wei et Nie,sp.nov..新种与Arge gracilicornis(Klug,1814)近似,但体型显著较大,体长9～10 mm;触角明显粗壮,短于中胸;颜面和内眶刻点粗密,侧脊弧形弯曲,额窝深,额脊显著;前翅2Rs室几乎等长于1Rs室,Rs脉第3段2倍于Rs第4段长,前后翅Cu<,2脉桩显著;雌虫锯腹片锯刃强烈突出;雄虫下生殖板端部宽截形,阳茎瓣头叶较宽,尾突窄长,腹侧中钩长且向上勾曲.新种模式标本保存于中南林业科技大学昆虫模式标本室.?＃     

中国方颜叶蜂属(膜翅目,叶蜂科)种团二新种

记述方颜叶蜂属Pachyprotasis pallidistigma种团2新种:周氏方颜叶蜂Pachyprotasis zhoui Wei et Zhong,sp. nov.和稻城方颜叶蜂Pachyprotasis daochengensis Wei et Zhong, sp. nov..新种模式标本保存在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)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.     

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.