广西食植瓢虫属五新种：鞘翅目：瓢虫科

本文记述采自广西的食植瓢虫属Ｅｐｉｌａｃｈｎａ５新种,即花端食植瓢虫Ｅｐｉｌａｃｈｎａ ａｎｔｈｏｄｅａ,ｓｐ．ｎｏｖ。,短叶食植瓢虫Ｅ．ｂｒａｃｈｙｌｏｄｂ,ｓｐ．ｎｏｖ。浪平食植瓢虫Ｅ．ｌａｎｇｐｉｎｇｅｎｓｉｓ,ｓｐ．ｎｏｖ．,靴管食植瓢虫Ｅ．ｏｃｒｅａｔａ,ｓｐ．ｎｏｖ．和管刺食植瓢虫Ｅ;ｓｉｐｏｎｅｃｈｉｎｕｌａｔａ,ｓｐ．ｎｏｖ．。     

海南岛食植瓢虫属一新种和二种新记录（鞘翅目：瓢虫科）

论述了采自海南岛的食植瓢虫属Epilachna一新种和二种中国新记录：拟球端食植瓢虫E. paraglobiera 新种; 同亨食植瓢虫E. donghoiensis Hoang, 1978中国新记录; 戈特克食植瓢虫E. gokteika Kapur, 1961中国新记录。     

食植瓢虫属Epilachna 中国新记录种及两种幼虫的形态记(鞘翅目: 瓢虫科)

记述食植瓢虫属Epilachna Chevrolat     

27种瓢虫mtDNA-COI基因序列分析及系统发育研究(鞘翅目:瓢虫科)

将自测的瓢虫科4亚科16种和从GenBank中检索到相关物种的mtDNA-COI基因编码区序列片断进行同源性比较,计算核苷酸使用频率,并构建分子系统树。在获得的471bp序列中,共有227个变异位点,195个简约信息位点,A T约占66.7%,转换发生比颠换更频繁。分子系统树表明:同种和同属的瓢虫均以较高置信值聚在一起,4个亚科都能恢复为单系;食植瓢虫亚科从系统树的基部最早分出,是瓢虫科最为原始的类群,小毛瓢虫亚科和盔唇瓢虫亚科首先聚为一支,显示二者具有较近的亲缘关系,然后再与瓢虫亚科相聚,食植瓢虫亚科的食植瓢虫属和裂臀瓢虫属均不是单系群。     

四川南充市郊瓢虫物种多样性的初步研究

20 0 3年3月～2 0 0 4年5月,分别在南充市郊的人工林、农田、河漫滩草丛、灌木丛4种生境进行瓢虫种群结构及多样性的抽样调查研究,共采集瓢虫标本1 2 1 6只,经鉴定隶属7亚科,2 2属,3 6种。个体数量以瓢虫亚科最多,食植瓢虫亚科次之。物种数以瓢虫亚科最多,食植亚科次之,小艳瓢虫亚科最少。各生境的多样性指数和物种丰富度排序为灌木丛>河漫滩草丛>人工林>农田。     

中国食蚧瓢虫名录

食蚧瓢虫在蚧虫生物防治中具有很重要的作用.根据食性可分为专性食蚧瓢虫和兼性食蚧瓢虫.本文记录了我国食蚧瓢虫8亚科26属65种,其中澳洲瓢虫和孟氏隐唇瓢虫为国外引进种.     

食植瓢虫属Epilachan中国新记录种及两种幼虫的形态记述（鞘翅目：瓢虫科）

记述食植瓢虫属Epilachna Chevrolat3种中国新记录种及其2种幼虫形态,编制了该属中国已知幼虫类检索秀。新记录种和幼虫标本均保存于南京农业大学昆虫标本室。     

食植瓢虫属Epilachna中国新记录种及两种幼虫的形态记述(鞘翅目:瓢虫科)

记述食植瓢虫属 Epilachna Chevrolat3种中国新记录种及其 2种幼虫形态 ,编制了该属中国已知幼虫种类检索表。新记录种和幼虫标本均保存于南京农业大学昆虫标本室。     

菱斑食植瓢虫Epilachna insignis Gorham成虫

<正>大型瓢虫,体长可达10¹1 mm。菱斑食植瓢虫在北京、河北、河南、山东、陕西、安徽、福建、广东、四川、云南等地都有分布,主要取食瓜蒌、龙葵、茄子和瓜类植物。     

福建省食螨瓢虫区系及地理分布

食螨瓢虫Stethorus spp.是世界上许多果树和经济作物叶螨的一类重要天敌。本文通过对采自福建省28个县、市约3000号食螨瓢虫成虫标本的整理,解剖雄外生殖器制片标本约800张,共鉴定出福建省食螨瓢虫9种,其中4种是福建新记录,包含1种中国大陆新记录和一未定名种。除福建北部和西北部以深点食螨瓢虫Stethorus punctillum Weise为优势种外,其余全省广大地区,以腹营食螨瓢虫片S.siphonulus Kapur和广东食螨瓢虫S.cantonensis Pang为优势种,本文记述了这9个种的分布和寄主,并对福建省食螨瓢虫区系及地理分布作初步分析。     

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.