高等植物基因组中的反转录转座子

高等植物基因组中的反转录转座子王石平张启发（华中农业大学作物遗传改良国家重点实验室武汉４３００７０）关键词植物,反转录转座子,遗传多样性,转座ＲＥＴＲＯＴＲＡＮＳＰＯＳＯＮＳＩＮＴＨＥＧＥＮＯＭＥＳＯＦＨＩＧＨＥＲＰＬＡＮＴＳＷＡＮＧＳｈｉＰｉｎ...     

发根农杆菌对黄瓜的遗传转化

发根农杆菌对黄瓜的遗传转化施和平李玲潘瑞炽（华南师范大学生物系广州５１０６３１）关键词发根农杆菌,黄瓜,毛状根,冠瘿碱ＧＥＮＥＴＩＣＴＲＡＮＳＦＯＲＭＡＴＩＯＮＯＦＣＵＣＵＭＩＳＳＡＴＩＶＵＳＢＹＡＧＲＯＢＡＣＴＥＲＩＵＭＲＨＩＺＯＧＥＮＥＳＳＨＩ...     

一种简单的分离提取水稻叶片中IAA,ABA和GAs的方法

一种简单的分离提取水稻叶片中ＩＡＡ,ＡＢＡ和ＧＡｓ的方法赵玉锦,王台,童哲（中国科学院植物研究所,１０００４４）ＡＳＩＭＰＬＩＦＩＥＤＭＥＴＨＯＤＦＯＲＥＸＴＲＡＣＴＩＯＮＯＦＥＮＤＯＧＥＮＯＵＳＩＡＡ,ＡＢＡＡＮＤＧＡｓＦＲＯＭＲＩＣＥＬＥＡＶＥ￥...     

受精过程中助细胞退化机理的研究进展

受精过程中助细胞退化机理的研究进展杨弘远（武汉大学生物系,武汉４３００７２）ＲＥＣＥＮＴＡＤＶＡＮＣＥＳＩＮＲＥＳＥＡＲＣＨＯＮＴＨＥＭＥＣＨＡＮＩＳＭＯＦＳＹＮＥＲＧＩＤＤＥＧＥＮＥＲＡＴＩＯＮＤＵＲＩＮＧＦＥＲＴＩＬＩＺＡＴＩＯＮＰＲＯＣＥＳＳ￥...     

SELF-TRAINING NEURAL NETWORK MODEL FOR REAL TIME TOMOGRAPHY DATA PROCESSING

ＳＥＬＦ—ＴＲＡＩＮＩＮＧＮＥＵＲＡＬＮＥＴＷＯＲＫＭＯＤＥＬＦＯＲＲＥＡＬＴＩＭＥＴＯＭＯＧＲＡＰＨＹＤＡＴＡＰＲＯＣＥＳＳＩＮＧＹｕ．Ｋｕｌｃｈｉｎ;Ｏ．Ｋａｍｅｎｅｙ（Ｄｅｐａｒｔｍｅｎｔｏｆｐｈｙｓｉｃｓ,ＦａｒＥａｓｔｅｒｎＳｔａｔｅＴｅｃ...     

福尔马林固定云南鲴的DNA提取及其细胞色素b基因序列分析

福尔马林固定云南鲴的ＤＮＡ提取及其细胞色素ｂ基因序列分析ＤＮＡＥＸＴＲＡＣＴＥＤＦＲＯＭＦＯＲＭＡＬＩＮ－ＦＩＸＥＤＸｅｎｏｃｙｐｒｉｓｙｕｎｎａｎｅｎｓｉｓＡＮＤＳＥＱＵＥＮＣＥＡＮＡＬＹＳＩＳＯＦＩＴＳＣＹＴＯＣＨＲＯＭＥＢＧＥＮＥ关键词福尔马林...     

鳙团移核鱼的遗传性状与个体生长

鳙团移核鱼的遗传性状与个体生长ＧＥＮＥＴＩＣＣＨＡＲＡＣＴＥＲＡＮＤＩＮＤＩＶＩＤＵＡＬＧＲＯＷＴＨＯＦＴＨＥＴＲＡＮＳＮＵＣＬＥＵＳＦＩＳＨＯＦＴＨＥＢＩＧＨＥＡＤＡＮＤＴＨＥＢＬＵＮＴＳＮＯＵＴＢＲＥＡＭ关键词鳙团移核鱼遗传性状个体生长Ｋｅｙ...     

马铃薯野生种叶肉原生质体培养及其植株再生（简报）

马铃薯野生种叶肉原生质体培养及其植株再生（简报）何亚文,李耿光,张兰英（中国科学院华南植物研究所,广州５１０６５０）ＭＥＳＯＰＨＹＬＬＰＲＯＴＯＰＬＡＳＴＣＵＬＴＵＲＥＡＮＤＰＬＡＮＴＬＥＴＲＥＧＥＮＥＲＡＴＩＯＮＦＲＯＭＷＩＬＤＳＰＥＣＩＥＳＯＦＰ...     

乙酰丁香酮对发根农杆菌遗传转化黄瓜的影响

乙酰丁香酮对发根农杆菌遗传转化黄瓜的影响施和平李玲潘瑞炽（华南师范大学生物系,广州５１０６３１）ＥＦＦＥＣＴＯＦＡＣＥＴＯＳＹＲＩＮＧＯＮＥＯＮＴＲＡＮＳＦＯＲＭＡＴＩＯＮＯＦＣＵＣＵＭＩＳＳＡＴＩＵＳＢＹＡＧＲＯＢＡＣＴＥＲＩＵＭＲＨＩＺＯＧＥＮＥ...     

利用源于病毒基因组的成分转化植物的现况与问题

利用源于病毒基因组的成分转化植物的现况与问题杨兴洪吴晓东张连忠（中国农业大学生物学院,北京１０００９４）ＡＤＶＡＮＣＥＳＡＮＤＰＲＯＢＬＥＭＳＯＮＶＩＲＵＳＤＮＡＡＮＤＲＮＡＴＲＡＮＳＦＯＲＭＩＮＧＰＬＡＮＴＳＹａｎｇＸｉｎｇｈｏｎｇＷｕＸｉａｏ...     

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.