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1.
日本蚱染色体C带带型研究   总被引:3,自引:0,他引:3  
对采自山西省的日本分蚱Tetrixjaponica(Bol.)进行了染色体C带带型分析,并与二刺羊角蚱CriotettixbispinosusDalm进行了比较,从而探讨了蚱总科染色体C带带型制备方法,比较了蚱总科与蝗总科染色体C带带型的异同性,为蚱总科物种多样性研究提供了染色体方面的资料。  相似文献   

2.
采用染色体C带技术,对剑角蝗科(Acrididae)佛蝗属(PhlaeobaStal)的增强佛蝗(P.imfumataBr.-W、白纹佛蝗(P.albonemaZheng)短翅佛蝗(P.angustidorsisBol)、长角佛蝗(P.antennateBr.-W)四个种的染色体进行了常规核型和C带带型分析研究,绘制了C带核型示意图,结果表明,四种佛蝗的染色体数都为2n♂=23.具有2~3对大型,  相似文献   

3.
运用支序系统学分析程序Hennig86V1.5对我国分布的稻蝗属(OxyaServ.)的部分种类的染色体性状进行了分析.通过计算不同染色体相对长度的方差和各种染色体异染色质的相对含量,确定各染色体相对长度相等,不含异染色质的种类为假想的最原始种类,从而确定性状的极性和状态.结果表明,在研究的7种蝗虫中,中华稻蝗(Oxyachinensis)最原始,上海稻蝗(Oxyashanghaiensis)和无齿稻蝗(Oxyaadentata)的相似程度最大,黄股稻蝗(O.flavevemura)、双带稻蝗(O.bicin-gula)和小稻蝗(O.intricata)相似,山稻蝗(O.agavisa)最进化,这与形态学的分类结果相似.  相似文献   

4.
菊蝗和黄佛蝗三个种染色体C带带型分析   总被引:3,自引:0,他引:3  
采用染色体C带技术对剑角蝗科(Acrididae)菊蝗属(PhlaeobidaI.Bol)2个种(黄纹菊蝗P.chloronemaLiang和海南菊蝗P.hainancnsisBietChen)和黄佛蝗属(ChlorophlaeobaRaemm)1个种(长翅黄佛蝗C.longusalaZheng)染色体进行了常规核型和C带带型分析并绘制了C带核型示意图.结果表明:菊蝗属两个种染色体数目相同2n♂=21,分组形式相同,均为3L,6M,1S,X,而黄佛蝗属的长翅黄佛蝗染色体数目2n♂=23,分组形式:2L,7M,2S,X,反映了属间染色体组型有差异.另外两种菊蝗C带带型不同,说明C带带型在种间区分上有重要意义.  相似文献   

5.
四种佛蝗染色体核型与C带带型研究   总被引:1,自引:0,他引:1  
采用染色体C带技术,对剑角蝗科(Acrididae)佛蝗属(PhlaeobaStal)的僧帽佛蝗(P.imfumataBr.-W、白纹佛蝗(P.alboemaZheng)、短翅佛蝗(P.augustidorsisBol.)、长角佛蝗(P.antennataBr.-W.)四个种的染色体进行了常规核型和C带带型分析研究,绘制了C带核型示意图二结果表明,四种佛蝗的染色体数都为2n=23.具有2~3对大型,5~7对中型,2~3对小型染色体.这四个种的主要区别表现在C带核型的差异上.C带带型差异可反映种间的分类关系.  相似文献   

6.
本文记载河南省宝天曼自然保护区的蝗虫共计35种,隶属于3总科、8科、29属,计蚱总科6种,蜢总科1种,蝗总科28种。  相似文献   

7.
两种戛蝗与中华剑角蝗染色体C带核型研究   总被引:2,自引:0,他引:2  
研究了中华剑角蝗(AcridacinereaThunb)、二色戛蝗[Gonistabicolor(Haan)]和云南戛蝗(GonistayunnanZheng)染色体核型及C带型.玻片制备采用压片法,BSG法C带处理.结果表明,中华剑角蝗染色体数目2n♂=23,分组形式为“1L,9M,1S,X”;两种戛蝗染色体数目2n♂=23,分组形式为“3L,6M,2S,X”.不同处表现在C带核型上,提示C带带型差异在种间区分上具有一定意义.  相似文献   

8.
济南市郊直翅目群落(ORTHOPTERENCOMMUNITIES)的调查研究   总被引:2,自引:0,他引:2  
作者依据环境湿度条件将济南市郊区分为干旱、中生偏干、中生偏湿及湿润四类生境,并对各类生境中直翅目群落进行系统的调查研究.结果表明:济南市郊不同类型生境中直翅目群落明显有利,干旱和中生偏干生境较湿润及中生偏湿生境的群落组成更为丰富。疣蝗Trilophidiaannulata、黄胫小车蝗Oedaleusinfernalis、短星翅蝗Calliptamitsabbreviatus和蒙古束颈蝗Sphingonotusmongolicus局限栖息于干旱生境,为该生境群落的特征种;中华稻蝗Oxya.chinensis、长翅稻蝗Ovelox小稻蝗Ohylaintricata、长翅素木蝗Shirakiacrisshirakii和大垫尖翅蝗Epacromiuscoerulipes局限生活于湿润生境,是该生境群落的特征种.短额负蝗Atractomorphasinenisi、中华剑角蝗Acridacinerea是典型广栖性种,中华稻蝗在低洼潮湿生境中优势明显,对这些种类有必要进一步深入研究.散生型东亚飞蝗Locustamigratoriamanitensis在调查区内时有所见,应引起足够重视.  相似文献   

9.
本文记述在云南麻栗坡采到的斜翅蝗属一新种:大眼斜翅蝗Eucoptacramegaoculasp.nov.,该新种近似于秉汉斜翅蝗EucoptacrabinghamiUvarov.模式标本保存于山东大学生物系.  相似文献   

10.
印度黄脊蝗核型和C-带的研究   总被引:1,自引:0,他引:1  
本文研究了印度黄脊蝗(patangaSuccinctaJohansson)的染色体组型和C-带。结果表明:印度黄脊蝗的染色体数目:2n()=22+x0=23,全部为端着丝粒染色体,NF=23;核型公式:2n()=2x=23t;中期染色体绝对长度总和为71.47±0.63μm;所有染色体都具有着丝粒C-带,异染色质总量为18.76±0.11%;染色体组中最长与最短染色体之比为4.4:1,臂比大于2:1的染色体比例为零,印度黄脊蝗的核型属“IC”核型。  相似文献   

11.
Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.  相似文献   

12.
何延凌 《科技信息》2008,(4):258-258
Language is a means of verbal communication. People use language to communicate with each other. In the society, no two speakers are exactly alike in the way of speaking. Some differences are due to age, gender, statue and personality. Above all, gender is one of the obvious reasons. The writer of this paper tries to describe the features of women's language from these perspectives: pronunciation, intonation, diction, subjects, grammar and discourse. From the discussion of the features of women's language, more attention should be paid to language use in social context. What's more, the linguistic phenomena in a speaking community can be understood more thoroughly.  相似文献   

13.
理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。  相似文献   

14.
As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.  相似文献   

15.
正The periodicity of the elements and the non-reactivity of the inner-shell electrons are two related principles of chemistry,rooted in the atomic shell structure.Within compounds,Group I elements,for example,invariably assume the+1 oxidation state,and their chemical properties differ completely from those of the p-block elements.These general rules govern our understanding of chemical structures and reactions.Using first principles calcula-  相似文献   

16.
We have developed an adiabatic connection to formulate the ground-state exchange-correlation energy in terms of pairing matrix linear fluctuations.This formulation of the exchange-correlation energy opens a new channel for density functional approximations based on the many-body perturbation theory.We illustrate the potential of such approaches with an approximation based on the particle-particle Random Phase Approximation(pp-RPA).This re-  相似文献   

17.
正The electronic and nuclear(structural/vibrational)response of 1D-3D nanoscale systems to electric fields gives rise to a host of optical,mechanical,spectral,etc.properties that are of high theoretical and applied interest.Due to the computational difficulty of treating such large systems it is convenient to model them as infinite and periodic(at least,in first approximation).The fundamental theoretical/computational problem in doing so is that  相似文献   

18.
<正>"The Journal of Shanghai Normal University:Mathematics"is published by Shanghai Normal University as regular issues of The Journal of Shanghai Normal University each year from 2014 in English.The editors-in-chief of the issues are professors Yuhao Cong and Maoan Han.The Journal of Shanghai Normal University was started in 1958 with  相似文献   

19.
20.
<正>"Journal of Jilin University(Science Edition)"is a comprehensive academic journal in the fields of science sponsored by Jilin University and administrated by the Ministry of Education of the Peoples Republic of China.The journal started publication in 1955.The original name at starting publication was"Journal of Natural Science of Northeast People University",which was changed into"Acta Scientiarum Naturalium Universitatis Jilinensis"in 1958 owing to the name change of the university.The present journal name has  相似文献   

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