关于国际遗传学联合会(I.G.F.)介绍

据国际遗传学联合会章程介绍,I.G.F.的宗旨是:促进全世界遗传学家之间的了解、合作和友谊;筹划和资助国际和地区性遗传学会议以及专题讨论会;与其它有关的国际组织保持联系并促进遗传学研究领域内的国际合作;互通情报;组织著名遗传家的访问等,借以促进遗传学的发展。     

青杨天牛(Saperda populnea L.)的初步研究

杨树是河南平原地区和西部山地造林的重要速生树种。近几年来由于青杨天牛的危害,已成为植树造林的严重威胁。根据1962年在郑州地区的调查,幼树被害株率达90％以上;枝梢被害率达8.4％左右。 青杨天牛分布于河南的郑州、开封、灵宝、洛阳、南阳、信阳、确山及北京等地。寄主发现有美杨(Populuspyramitalis Borkh)、毛白杨(P.tomentosa Carr.)、小叶     

Rhodobryum commersoni(Schwaegr.) Par. and R. aubertii (Schwaegr.) Thér. in South India.

Abstract

A new species Tristichella dimorpha is described and illustrated and a comparison made with the two other species in the genus, T. spiculifera and T. glabrescens, and with Clastobryella cuculligera to which it appears to be closely related, particularly in sporophytic characters.     

梨眼天牛(Chreonoma fortunei Thom.)的初步研究

梨眼天牛在我国分布较广,危害亦较严重。被害果树不仅果枝被蛀空,而且还常取食果枝的表皮,因之又为腐烂病的传布创造了条件。受此虫为害的果树不仅枝干伤班累累,影响结果,而且常伴随着腐烂病的感染,导致全株枯死。 目前此虫尚无详细报导。作者于1959—1962年对此虫断续作了些室内外观察、饲养及防治实验,今将初步结果介绍于后。 一、分布与被害植物 此虫广布于我国东北及山东、江苏、浙江、安徽、台湾、福建、山西和陕西等省。被害植物主要有苹果、梨、海棠、杏、梅、桃、石楠、野山桂等。在陕西省关中地区,以苹果、梨、海棠被害最重,被害率达10—100％。 二、形态特征概述 (一)成虫 体长8—11毫米,体宽3—4毫米。体呈圆筒形,橙黄色;鞘翅为蓝绿色或蓝紫色,带有金属光泽;复眼黑色,完全为触角基瘤分为上下两叶开。触角11节,基部5节棕黄色,端部3、4节颜色较深,为褐色。体各部破有棕色竖毛,后胸腹板两侧各有一块蓝黑色或紫色的斑点。     

Gentiana×komnensis E. Mayer,hybr. nov. (=G. lutea L. subsp.symphyandra Murb.×G. pannonica Scop.)

Zusammenfassung Aus dem Gebiet der Julisehen Alpen wird eine neue Hybride vonGentiana lutea subsp.symphyandra×G. pannonica, benanntG.×komnensis, beschrieben.     

木莲Manglietia fordiana (Hemsl.) Oliv.

属于木兰科,木莲属,常绿乔木,高达20米。叶厚革质,长椭圆状披针形,长5—17厘米,宽1.5—6.5厘米,全缘,上面绿色,下面苍绿色或有白粉,叶柄长约     

ÜberAnthriscus fumarioides (W. K.) Spreng

Ohne Zusammenfassung     

Salix scrobigera (S. cinerea×grandifolia.)

Ohne Zusammenfassung     

ÜberArtemisia salina Willd. erweitert (Syn.A. Seriphium Wallr.)

Ohne Zusammenfassung     

Ephemerella readeri Müll. Hal. (Physcomitrella readeri (Müll. Hal.) I.G. Stone & G.A.M. Scott,Funariidae, Bryophyta): a genus and species new to Europe

Abstract

A morphological and molecular analysis of a Physcomitrella, collected from a reservoir margin in the north of England, revealed this to be P. readeri, a species new to Europe. The present study clarifies previous confusion over the taxonomy of P. readeri showing it to be clearly distinct in both sporophytic and gametophytic characters from P. patens and uniform across its world range from England to USA, Japan and Australasia. While phylograms of the ITS1 region from both the Physcomitrella species, Physcomitrium pyriforme (Hedw.) Bruch & Schimp., Enthosthodon attenuatus (Dicks.) Bryhn and Funaria hygrometrica Hedw., place the first two in separate clades, in ITS2 phylograms they occur as sister taxa. This, together with previous genealogical studies on the speciation history of the Physcomitrella–Physcomitrium species complex, and morphology, suggests that generic rank is appropriate for P. readeri. We therefore reinstate the original name Ephemerella readeri Müll. Hal. Recent records at several reservoirs in England indicate that E. readeri may be native to UK, though remarkable congruence in ITS1 with Australian plants also suggests recent arrival as an alternative possibility.     

Ausflug auf den grossen Bösenstein (7731 F.) (17. August 1868.)

Ohne Zusammenfassung     

Brachythecium funkii Schimp. and B. japygum (Głow.) Köckinger & Jan Kučera comb. nov., two Alpine species hitherto included in B. cirrosum (Schwägr.) Schimp.

Morphological and molecular studies support the recognition of three alpine species within the traditional concept of Brachythecium cirrosum, which requires the resurrection of two earlier described taxa, B. funkii and B. japygum, comb. nov., from synonymy. According to nuclear and chloroplast sequence data, the latter two taxa proved to be closely related to B. tommasinii and B. tenuicaule, whereas the affinities of B. cirrosum within Brachythecium are rather unclear. B. funkii is a coarser plant than B. cirrosum and also differs in shorter leaf acumens and much larger lamina cells. On the other hand, B. japygum (better known under the illegitimate name Eurhynchium histrio) can be distinguished from B. cirrosum in the prostrate and densely pinnate to subdendroid growth form, longer leaf acumens and wider lamina cells with lumens wider than walls. All three species also differ from each other in the morphology of the alar cell group. Despite their shared preference for calcareous rocks, the three species show marked differences in habitat requirements.     

Eine Zwillingsblüte beiGymnadenia conopea (L.) R. Br.

Ohne Zusammenfassung