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基于对世界柽麦蛾属昆虫外部形态和外生殖器的形态学研究,选择了66个性状演变系列,通过PAUP*4b10软件对柽麦蛾属51种昆虫进行了支序系统学分析。分析结果认为heluanensis种团并不是一个单系群,柽麦蛾属被重新作了7个种团的划分。在支序系统学分析的基础上,柽麦蛾属昆虫的14个地理分布区域等级关系被重建,显示出古地中海地区复杂的历史,同时说明在该属分布格局中扩散事件客观存在。 相似文献
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中国柽麦蛾属研究(鳞翅目:麦蛾科) 总被引:5,自引:0,他引:5
柽麦蛾属(Ornativalva Gozmany,1955)隶属于麦蛾科(Gelechiidae)、麦蛾亚科(Gelechiinae)、麦蛾族(Gelechiini)。全世界已记录45种和亚种,其中已知寄主的12个种,除一种可取食柽柳属(Tamarix)和瓣鳞花属(Frankenia)植物外,其余的只取食柽柳属植物。该属的分布与柽柳属植物的分布几乎完全一致,分布在非洲、南欧、印度和蒙古。我国北方柽柳属植物分布广泛,但过去仅有一种该属昆虫的分布记录。 相似文献
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树麦蛾属Erippe Chambers隶属麦蛾科Gelechiidae麦蛾亚科Gelechiinae,分布于古北区、新北区和新热带区。包括本文全世界已记载19种,已知寄主的种类都危害木本植物。本文记述我国树麦蛾属8种,其中有6新种。研究中采用Pitkin(1986)“展开技术”(the unrolling technique)的制片方法:将复杂类型的麦蛾雄性外生殖器自背兜一侧展开,以免特征重叠。全部研究标本保存在西北林学院。 相似文献
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雪麦蛾属ChionodesHübner已知百种以上。其中新北区72种,新热带区12种,古北区28种,估计古北区种类近40种(Huemer&Satler,1995)。我国该属昆虫已知1种(李后魂、郑哲民,1995)。本文记述2新种,分别分布于陕西和青海。模式标本存陕西师大动物所。1.彬县雪麦蛾Chionodesbinxianensis,新种(图1)本种与Chionodespraeclarela(Herrich-Schefer)相似,但雄性外生殖器爪形突宽短,其后缘具明显的中突。正模♂,副模1♂,陕西彬县,1990-V-15,王宣利采。2.大通雪麦蛾Chionodesdatongensis,新种(图2)本种与百脉根雪麦蛾Chionodesfumatela(Douglas)极近似,但雄性外生殖器爪形突和阳茎形状与后者的不同。正模♂,青海大通东峡,1988-Ⅶ-25。 相似文献
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系统研究了中国苔麦蛾属Bryotropha,中国新纪录,记述6新种2中国新纪录种。文中提供了两性外生殖器特征图和分种检索表。模式标本保存于陕西师范大学动物研究所。拟寿苔麦蛾Bryotropha ambisenectella sp.nov.分布于甘肃和陕西,该种与寿苔蛾Bryotropha senectella(Zeller)相似,但雄性外生殖器抱器腹突出平缓;雌性外生殖器前阴片后缘凸起。短瓣苔麦蛾 相似文献
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指麦蛾属DactylethrelaFletcher世界上已知10种,分布于古北区、东洋区和非洲区,但中国尚无记载。本文报道指麦蛾属分布中国的3个种:其中刀瓣指麦蛾D.catarinaPonomarenko(分布:陕西杨陵、凤县辛家山、甘肃康县豆坝及俄罗斯远东地区)和青冈指麦蛾D.tegulifera(Meyrick)(分布:陕西杨陵、凤县辛家山、甘肃康县阳坝和朝鲜、日本、俄罗斯远东地区;寄主:栎树、青冈和麻栎)为中国新记录种;新种沈氏指麦蛾D.shenae,sp.nov.分布于江西婺源县珍珠山,它与D.subteguliferaPonomarenko外形相似,但体小,前翅斑纹赭黄色至赭褐色,中部及外缘无明显斑纹;雄性外生殖器抱器小瓣大而直。文中提供了中国种分种检索表和外生殖器特征图。模式标本保存于南开大学生物系。 相似文献
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整理了茄麦蛾属Hedma世界已知种的名录及寄主和分布资料 ,记述了分布中国的一新种 :枸杞茄麦蛾Hedmalyciasp .nov .,危害宁夏枸杞LyciumbarbarumLinn .,模式产地为陕西省西安市。文中给出了新种雌雄外生殖器特征图。该属为中国新记录 相似文献
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整理了茄麦蛾属Hedma世界已知种的名录及寄主和分布资料,记述了分布中国的一新种:枸杞茄麦蛾Hedma lycia sp. Nov., 危害宁夏枸杞Lycium barbarum Linn.,模式产地为陕西省西安市。文中给出了新种雌雄外生殖器特征图。该属为中国新记录。 相似文献
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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. 相似文献
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RICHARD E. NORRIS 《Botanical journal of the Linnean Society. Linnean Society of London》1991,106(1):1-40
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. 相似文献
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JOAN VALUÈS MONTSERRAT TORRELL NÚRIA GARCIA JACAS 《Botanical journal of the Linnean Society. Linnean Society of London》2001,137(4):399-407
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. 相似文献
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肝癌中HBV和HCV基因和抗原的分布及意义 总被引:1,自引:0,他引:1
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 相似文献
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H.-R. GREGORIUS 《Biological journal of the Linnean Society. Linnean Society of London》1984,23(2-3):157-165
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. 相似文献
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. 相似文献