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1.
中国东北地区林蛙属物种的分类学研究(两栖纲:蛙科)   总被引:24,自引:1,他引:23  
用比较分类学方法和数值分类方法相配合,对我国东北产林蛙属物种多样性和原各命名物种的有效性及与中国林蛙的关系进行了探讨。结果认为:地方名为哈土螨的原中国林蛙的东北居群应属于我国蛙类的一新纪录东北林蛙R.dybowskii,而R.semiplicata和R.chensinensis changbaishanensis(魏刚等,1991a)为该种的同物异名,重新界定了东北林蛙和中国林蛙的分布区,提出中国  相似文献   

2.
中国西部地区绿蟾蜍的分类研究   总被引:3,自引:0,他引:3  
对中国西部(新疆和西藏)原定名为绿蟾蜍Bufoviridis的27个居群进行了开矿学比较研究,同时与产于邻近地区的Bufodanatensis(土库曼)、B.loatastii和B.stomaticus(克什米尔)的3种蟾蜍标本或原始描述作了对比。我们赞同Borkin等(1988)的研究结果,并将产中地原定名为.viridis中四倍体的各居群统归为B.danatensis。同时将才原各居群分为4个  相似文献   

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采用RAPD和ISSR标记探讨中国疣粒野生稻的遗传多样性   总被引:124,自引:1,他引:123  
用随机扩增多态DNA(RAPD)和inter-简单重复序列(ISSR0标记对分别来自中国海南和云南20个居群的疣料野生稻(Oryaz granulata (Nees et Arn. ex Watt.))混合样品,以及海南(M5)和云南(M27)2个居群各20个植株的遗传多生进行了检测。在混合取样的居群中,20个RAPD引物和12个ISSR引物分别扩增出209个122条带,多态条带比率9PPB)分别  相似文献   

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禺毛茛复合体及其近缘种过氧化物酶同工酶研究   总被引:5,自引:2,他引:3  
对国产禺毛莨(Ranunculuscantoniensis,DC)复合体及其近缘种8个种的15个居群52个个体的根进行了过氧化物同工酶研究,结果表明:(1)居群内过氧化物酶谱略有变异,同工酶酶谱或多或少能显示居群特征,供试的8个种中没有任何2个种的图谱完全一致,这说明在处级水平酶谱呈现出高度的分化现象。(2)根据染色体,孢粉和过氧化酶同工酶的资料推测,除R.silerifolius(2x)外,R.  相似文献   

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林英任  现存悌 《菌物系统》2000,19(3):297-301
我国齿裂菌属的4个分类单元,其中包括2个新种:生于青冈」Cyclobalanopsisglauca(Thunb.)Oerst.「上的青冈齿裂菌(Coccomyces cyclobalanopsis Y.R.Lin&Z.Z..Li sp.nov.)和生于香叶树(Lindera communis Hemsl.)上的福建齿裂菌(C.fujianensis Y.R.Lin&C.T..Xiang sp.no  相似文献   

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中国横断山区竹亚科箭竹属新分类群   总被引:5,自引:0,他引:5  
辉朝茂  杜凡 《植物研究》1998,18(3):257-274
报道了中国西南部横断山区竹亚科箭竹属6个新种,4个新变型,它们是:马歌箭竹(FargesiaauritaHsuehetHui)阔叶箭竹(F.macrophyllaHsuehetHui)怒江箭竹(F.nujiangesisHsuehetHui)兰坪箭竹(F.nujiangensisf.lanpingensisHsuehetH.R.Zhang)纹鞘箭竹(F.nujiangensisf.striataH  相似文献   

7.
贵州省悬钩子属种质资源考察   总被引:15,自引:0,他引:15  
对贵州省东北、东南、西南和西北4个地区悬钩子属(RubrsL.)野生种类的分布、生长习性等进行了调查。共采集55种7个变种,其中R.grayanus,R.mallotifolius,R.tsangvrus,R.faberi,R.henryi为贵州省新记录种。R.setchuenensisR.coreanus,R.corchorifolius,R.lambertianus,R.niveus,R.mullibracteatus,R.tephrodes分布最广。除R.setchuenensis,R.tephrodes外均有驯化利用价值。调查发现,具红、黄、黑三种不同果色的插田泡,秋季结果的小柱悬钩子、红泡刺藤和大乌泡。基本查清了贵州省悬钩子属植物的种类和分布,为进一步引种、保存和发掘利用提供科学依据。  相似文献   

8.
不同温度条件下环境水分对中国林蛙幼体存活的影响   总被引:12,自引:2,他引:10  
中国林蛙(RanachensinensisDavid)主要生活于东北地区的森林中。由于过量捕捉和当地生境的破坏,野生资源已逐渐枯竭,不少地区已处于灭绝的边缘[1,2]。因此,开展中国林蛙的人工养殖不仅具有重要的经济价值,而且对保护生物多样性也有积极意...  相似文献   

9.
木蓝根瘤菌的16S rDNA全序列分析及DNA—DNA杂交   总被引:2,自引:0,他引:2  
韦革宏  陈文新 《遗传学报》2000,27(11):1027-1032
通过数值分类,SDS-全细胞蛋白电泳分析,对分离自西北黄土高原地区的木蓝根瘤菌进行了研究,获得了1个新类群。在此基础上,进行了中心菌株SHL042的16S rDNA全序列分析,得到系统发育树状图。SHL042与R.tropici A、R.tropici B、R.leguminosarum、R.etli、R.hananesis、R.mongolense和R.gallicum构成一个发育分支,其与这些  相似文献   

10.
中国白菜RAPD分子遗传图谱的构建   总被引:17,自引:0,他引:17  
以芜菁(Brassica campestris L.ssp.rapifera Metzg)和结球白菜(B.carnpestris L.ssp .Plkinensis(Lour.)Oisson)杂交的F2群体为试材,采用RAPD标记,用84个10核苷酸随机引物构建了白菜的RAPD遗传图谱。该图谱覆盖基因组的1632.4cM(certi Morgan)标记间的平均间隔为16.5cM。其中最长的连锁群为  相似文献   

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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   

16.
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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Curcumin is the yellow pigment of turmeric that interacts irreversibly forming an adduct with thioredoxin reductase (TrxR), an enzyme responsible for redox control of cell and defence against oxidative stress. Docking at both the active sites of TrxR was performed to compare the potency of three naturally occurring curcuminoids, namely curcumin, demethoxy curcumin and bis-demethoxy curcumin. Results show that active sites of TrxR occur at the junction of E and F chains. Volume and area of both cavities is predicted. It has been concluded by distance mapping of the most active conformations that Se atom of catalytic residue SeCYS498, is at a distance of 3.56 from C13 of demethoxy curcumin at the E chain active site, whereas C13 carbon atom forms adduct with Se atom of SeCys 498. We report that at least one methoxy group in curcuminoids is necessary for interation with catalytic residues of thioredoxin. Pharmacophore of both active sites of the TrxR receptor for curcumin and demethoxy curcumin molecules has been drawn and proposed for design and synthesis of most probable potent antiproliferative synthetic drugs.  相似文献   

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正Dear Editor,In December 2019, a novel human coronavirus caused an epidemic of severe pneumonia(Coronavirus Disease 2019,COVID-19) in Wuhan, Hubei, China(Wu et al. 2020; Zhu et al. 2020). So far, this virus has spread to all areas of China and even to other countries. The epidemic has caused 67,102 confirmed infections with 1526 fatal cases  相似文献   

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