中国吉松叶蜂属一新种记述（膜翅目：松叶蜂科）

记述采自陕西秦岭的吉松叶蜂属Gilpinia Benson1新种－青扦吉松叶蜂G.wilsonae sp.n。该种昆虫青扦Picea wilsonii Mast.，一年发生两代，结茧过冬。新种的模式标本保存于西北林学院昆虫标本室。     

从松叶蜂分离的球孢白僵菌及其致病性

从东北伊通红松林采集的自然染病死亡的帕克阿扁松叶蜂Acantholyda 虫尸上分离获得一株球孢白僵菌,定名为FDB01。用该菌株孢子悬浮液感染油松阿扁叶蜂Acantholyda posticalis和落叶松叶蜂Pristiphora erichsonii幼虫,研究该菌株的致病情况。结果表明,用浓度为2×108孢子/mL的孢子悬浮液处理16d后,该菌株对油松阿扁叶蜂和落叶松叶蜂的致死率分别达到了94.4%和100%,说明该菌株对松叶蜂具有很强的致病力。     

中国云南松叶蜂科二新种一新组合记述：膜翅目：广腰亚目

在中国云南省发现松叶蜂科Ｄｉｐｒｏｎｉｄａｅ２新种,即钝齿吉松叶蜂Ｇｉｌｐｉｎｉａｈｅｂｅｄｅｎｔａｔａ新种和吴氏大松叶蜂Ｍａｃｒｏｄｉｐｒｉｏｎｗｕｉ新种。另一个记载于云南的种ＧｉｌｐｉｎｉａｄｉｓａＳｍｉｔｈ从吉松叶蜂属ＧｉｌｐｉｎｉａＢｅｎｓｏｎ移入小松叶蜂属ＭｉｃｒｏｄｉｐｒｉｏｎＥｎｓｌｉｎ,称迪萨小松叶蜂Ｍｉｃｒｏｄｉｐｒｉｏｎｄｉｓｕｓ（Ｓｍｉｔｈ）新组合。大松叶蜂属Ｍａｃｒｏｄｉｐ     

寄生靖远松叶蜂的姬蜂科(膜翅目)中国一新纪录种

报道采自山西寄生靖远松叶蜂Diprion jingyuanensis Xiao et Zhang的姬蜂科中国1新纪录种,吉松叶蜂侵姬蜂Lamachus gilpiniae Uchida,1955。对其形态特征进行了重新描述。介绍了侵姬蜂属Lamachus Frster,1869在我国的种类及其分布;编制了我国已知种检索表。     

A NEW CHINESE RECORD SPECIES OF ICHNEUMONIDAE (HYMENOPTERA)PARASITIZING DIPRION JINGYUANENSIS

报道采自山西寄生靖远松叶蜂Diprion jingyuanensis Xiao et Zhang的姬蜂科中国 1新纪录种,吉松叶蜂侵姬蜂Lamachus gilpiniae Uchida,1955.对共形态特征进行了重新描述.介绍了侵姬蜂属Lamachus F(o)rster,1869在我国的种类及其分布;编制了我国已知种检索表.     

寄生靖远松叶蜂的卷唇姬蜂属一新种(膜翅目：姬蜂科，锯角叶蜂科)

靖远松叶蜂ＤｉｐｒｉｏｎｊｉｎｇｙｕａｎｅｎｓｉｓＸｉａｏｅｔＺｈａｎｇ分布在山西、甘肃等省,是近几年发现并已对油松林造成严重危害的新害虫。近来我们在调查该害虫天敌时,发现一种重要天敌——姬蜂,经鉴定为卷唇姬蜂属一新种,现报道如下。模式标本保存在林业...     

马尾松腮扁叶蜂的生活习性及药物防治

马尾松腮扁叶蜂Cephalcia pinivora Xiao et Zeng是腮扁叶蜂属的一个新种[1]。主要分布在重庆和四川等地,严重危害马尾松。在重庆1年1发生代,成虫发生期约80d,3月中旬开始羽化,雄虫先羽化出土,雌虫在羽化高峰期才开始出土。未交配雌虫能孤雌生殖。用2.5%溴氰菊酯等7种烟剂喷烟和3‰溴氰菊酯粉剂对成虫进行防治试验,结果表明,成虫羽化盛期后3~5d(4月上旬)是防治成虫的最佳时机,烟剂防治效果好的可达80%以上,粉剂效果也可达86%以上。     

中国钩瓣叶蜂属Macrophya annulitibia种团二新种及分种检索表（膜翅目：叶蜂科）

记述采自中国四川和西藏钩瓣叶蜂属Macrophya Dahlbom环胫钩瓣叶蜂种团M annulitibia group 2新种:凯文钩瓣叶蜂 Macrophya kaiweni Liu,Li&Wei sp.nov.和拟盛氏钩瓣叶蜂 M.pseudoshengi Liu,Li&Wei sp.nov.;提供了 M.annulitibia group中国已知种类检索表和分布图.     

异耦阿扁叶蜂的生物学及其防治

异耦阿扁叶蜂(Acantholyda dim orphaM aa)是马尾松(Pinus massonianaLamb.)的食叶害虫,局部可对马尾松林的生长造成损失。此虫在浙江省松阳县1 a发生1代,以预蛹在土茧内越冬。成虫于3月中旬至4月下旬羽化,并在当年生嫩针叶上产卵。幼虫于5月中旬至6月中旬成熟并陆续入土。     

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.