栝楼属8种植物的染色体数目

栝楼属８种植物的染色体数目黄潞琦,乐崇熙,李懋学（中国中医研究院中药研究所,北京１００７００）（北京大学生物系,北京１００８７１）关键词栝楼属,染色体数目ＣＨＲＯＭＯＳＯＭＥＮＵＭＢＥＲＳＯＦ８ＳＰＥＣＩＥＳＩＮＴＲＩＣＨＯＳＡＮＴＨＥＳ￥ＨＵＡＮＧ...     

菝葜属和肖菝葜属11个种的染色体数目

菝葜属和肖菝葜属１１个种的染色体数目傅承新,沈朝栋,黄爱军（浙江农业大学植物教研室杭州３１００２９）关键词染色体数目,菝葜属,肖菝葜属,中国ＴＨＥＣＨＲＯＭＯＳＯＭＥＮＵＭＢＥＲＳＯＦ１１ＳＰＥＣＩＥＳＩＮＳＭＩＬＡＸＬ．ＡＮＤＨＥＴＥＲＯＳＭＩＬＡ...     

4种珍珠菜属植物染色体研究

４种珍珠菜属植物染色体研究廖亮,徐玲玲,田先华（江西九江师范专科学校生物研究所九江３３２０００）（陕西师范大学生物系西安７１００６２）关键词珍珠菜属,染色体数目,核型ＳＴＵＤＩＥＳＯＦＣＨＲＯＭＯＳＯＭＥＯＦＦＯＵＲＳＰＥＣＩＥＳＩＮＬＹＳＩＭＡＣＨ...     

7种国产野生经济植物的染色体数目

７种国产野生经济植物的染色体数目张渝华,邱江峰（浙江省医学科学院药物研究所杭州３１００１３）关键词７种植物,染色体数目ＣＨＲＯＭＯＳＯＭＥＮＵＭＢＥＲＳＯＦＳＥＶＥＮＷＩＬＤＥＣＯＮＯＭＩＣＰＬＡＮＴＳＦＲＯＭＣＨＩＮＡ￥ＺｈａｎｇＹｕｈｕａ;Ｑｉｕ...     

长体茧蜂属中国五新记录种

长体茧蜂属中国五新记录种ＮＥＷＲＥＣＯＲＤＳＯＦＭＡＣＲＯＣＥＮＴＲＵＳＣＵＲＴＩＳ（ＨＹＭＥＮＯＰＴＥＲＡ：ＢＲＡＣＯＮＩＤＡＥ：ＭＡＣＲＯＣＥＮＴＲＩＮＡＥ）ＦＲＯＭＣＨＩＮＡ￥长体茧蜂属ＭａｃｒｏｃｅｎｔｒｕｓＣｕｒｔｉｓ,１８３３隶于茧蜂科长...     

中国异肢螨属一新纪录和美绥螨属一新纪录（蜱螨亚纲：革螨股）

中国异肢螨属一新纪录和美绥螨属一新纪录（蜱螨亚纲：革螨股）马立名（吉林省地方病第一防治研究所白城１３７０００）ＡＮＥＷＲＥＣＯＲＤＯＦＰＯＥＣＩＬＯＣＨＩＲＵＳＡＮＤＡＮＥＷＲＥＣＯＲＤＯＦＡＭＥＲＯＳＥＩＵＳＦＲＯＭＣＨＩＮＡ（ＡＣＡＲＩ：ＧＡＭＡ...     

日本医蛭的染色体数目和形状

日本医蛭的染色体数目和形状ＣＨＲＯＭＯＳＯＭＥＮＵＭＢＥＲＡＮＤＣＨＡＲＡＣＴＥＲＩＳＴＩＣＳＯＦＡＨＩＲＵＤＩＮＩＤＡＥＬＥＥＣＨＨｉｒｕｄｏｎｉｐｐｏｎｉａ关键词日本医蛭，精巢和卵巢，染色体数目，蛭类系统发生ＫｅｙｗｏｒｄｓＨｉｒｕｄｏｎｉｐｐｏ...     

中国索霉属一新种——重楼索霉

中国索霉属一新种——重楼索霉⒇臧穆王世林（中国科学院昆明植物研究所,昆明６５０２０４）ＡＮＥＷＳＰＥＣＩＥＳＯＦＴＨＥＧＥＮＵＳＨＯＲＭＯＭＹＣＥＳＦＲＯＭＣＨＩＮＡ——ＨＯＲＭＯＭＹＣＥＳＰＡＲＩＤＩＰＨＩＬＵＳＺａｎｇＭｕ,ＷａｎｇＳｈｉｌｉｎ（...     

福建悬钩子属一新种

福建悬钩子属一新种张永田,陈丽云（福建省亚热带植物研究所,厦门３６１００６）关键词悬钩子属,九仙莓,新种ＡＮＥＷＳＰＥＣＩＥＳＯＦＲＵＢＵＳ（ＲＯＳＡＣＥＡＥ）ＦＲＯＭＦＵＪＩＡＮ￥ＺｈａｎｇＹｏｎｇｔｉａｎａｎｄＣｈｅｎＬｉｙｕｎ（ＦｕｊｉａｎＩｎ...     

广西天南星属一新种

广西天南星属一新种刘寿养（广西中医学院,南宁５３０００１）关键词天南星属;桂西南星ＡＮＥＷＳＰＥＣＩＥＳＯＦＧＥＮＵＳＡＲＩＳＡＥＭＡＭＡＲＴ．ＦＲＯＭＧＵＡＮＧＸＩ￥ＬｉｕＳｈｏｕｙａｎｇ（ＧｕａｎｇｘｉＣｏｌｌｅｇｅｏｆＴｒａｄｉｔｉｏｎａｌＣｈ...     

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.