scholarly journals Is Lotus zhegulensis Klok. (Fabaceae) a separate species endemic of the Middle Volga Region or just a variety of a widespread L. corniculatus L.?

Turczaninowia ◽  
2021 ◽  
Vol 24 (4) ◽  
pp. 73-83
Author(s):  
Tatyana E. Kramina ◽  
Ilja G. Meschersky ◽  
Alina V. Fedorova ◽  
Natalia V. Vasilieva ◽  
Nina Yu. Stepanova ◽  
...  
Keyword(s):  
Dna Sequences ◽  
Plastid Dna ◽  
Lotus Corniculatus ◽  
Separate Species ◽  
Volga River ◽  
Middle Volga Region ◽  
Local Populations ◽  
The North ◽  
Nuclear Its ◽  
The Right

We have studied several samples from Lotus corniculatus s. l. and L. zhegulensis populations with the use of SSR and sequenced nuclear (ITS) and plastid (atpB-rbcL, ndhC-trnV, rpl32-trnL(UAG), trnH-psbA, trnL-trnF) markers. We analysed 9 local populations from the Volga River valley ranging from Ulyanovsk in the north to Volgograd in the south, as well as two local populations from Moscow and Lipetsk Provinces. Analyses of SSR markers using the STRUCRURE program divided the sample into three genetic clusters. Populations from Moscow and Lipetsk Provinces, and three local populations from the ‘locus classicus’ location of L. zhegulensis in Samara Province appeared to be the most genetically differentiated while all the other populations were variously genetically admixed. Low pairwise Fst values indicate low genetic differentiation of Lotus populations and the intraspecific nature of the revealed diversity. The nuclear and plastid DNA sequences analyzed yielded little information. Substitutions and indels revealed were mostly autapomorphies characteristic of separate specimens or small groups of specimens but not of populations. Our study enables to firmly conclude that Lotus populations from the right bank of the Volga River in vicinity of Zhiguli upland described as L. zhegulensis are weakly genetically differentiated from other populations of Lotus corniculatus s. l. and, hence, cannot be regarded as a separate species.

Hybridization in the Temperate Bamboos (Poaceae: Bambusoideae: Arundinarieae): A Phylogenetic Study Using AFLPs and cpDNA Sequence Data

2021 ◽  
Vol 46 (1) ◽  
pp. 48-69
Author(s):  
Jimmy K. Triplett ◽  
Lynn G. Clark
Keyword(s):  
Dna Sequences ◽  
Sequence Data ◽  
Phylogenetic Analyses ◽  
Intergeneric Hybrid ◽  
Plastid Dna ◽  
Sensu Stricto ◽  
Phylogenetic Study ◽  
Aflp Data ◽  
The North ◽  
Cpdna Sequence

Abstract—The temperate bamboos are a taxonomically difficult group with nearly 600 species in approximately 30 genera and at least 12 constituent lineages. In this study, phylogenetic relationships were explored using amplified fragment length polymorphism (AFLP) data in comparison with a phylogeny based on plastid DNA sequences, with an emphasis onArundinariaof North America and its allies in East Asia (theArundinariaclade). Molecular analyses involved 248 individuals in 10 genera and 60 species. Hybridization was detected both within and among genera. Comparative analyses indicated hybrid origins for species in several widespread and well-known genera, includingHibanobambusa,Sasaella, andSemiarundinaria. Evidence also indicated thatPseudosasa japonica(the type species ofPseudosasa) is an intergeneric hybrid involvingPleioblastusandSasamorpha. In addition, cryptic hybrids were detected within and amongPleioblastus,Sasa, andSasamorpha. After accounting for hybrids, phylogenetic analyses of AFLP data provided resolution for core lineages in theArundinariaclade, includingPleioblastussensu stricto,Sasas. s., andSasamorpha.AFLP data also provided evidence for the monophyly of the North American cane bamboos (Arundinaria, three species) but failed to identify their closest relative among the East Asian taxa. The broader evolutionary implications of hybridization in the temperate bamboos are discussed along with recommendations for future studies.

Magnolia sinostellata and relatives (Magnoliaceae)

Phytotaxa ◽  
2013 ◽  
Vol 154 (1) ◽  
pp. 47 ◽  
Author(s):  
YA-LING WANG ◽  
ERLAND EJDER ◽  
JIAN-FEN YANG ◽  
RAO LIU ◽  
LI-MING YE ◽  
...  
Keyword(s):  
Dna Sequences ◽  
Plastid Dna ◽  
Distinct Species ◽  
Morphological Characters ◽  
Phylogenetic Study ◽  
Wild Populations ◽  
Species Status ◽  
Separate Species ◽  
Magnolia Sinostellata ◽  
Normal Meiosis

Magnolia sinostellata has been considered a synonym of Magnolia stellata by several taxonomists due to many shared morphological characters. With similar leaves and twigs, Magnolia amoena is distributed in areas near M. sinostellata. These three species were studied by comparing morphological, cytological and palynological characters, creating a maximum parsimony phylogenetic tree based on plastid DNA sequences and studying these taxa in the field. The results are as follows: M. sinostellata is a diploid, 2n=2x=38, and there are heterozygotes with paracentric inversion chromosomes in wild populations. Magnolia stellata is also a diploid, and there are heterozygotes with pericentric inversion chromosomes in wild populations. The abnormal chromosome behaviour in meiosis has serious effects on survival of the two species. Magnolia amoena is diploid with more or less normal meiosis except for a few lagging chromosomes in anaphase I and II. Magnolia stellata has a more complicated exine sculpture than the other two; exine structure is different in all three species. Separate species status for M. sinostellata is also supported by results of the plastid DNA phylogenetic study. Distributions, population descriptions and observations are provided, and based on all the evidence presented we conclude that M. sinostellata is a distinct species in M. subgenus Yulania. 

scholarly journals Materials for the Characterization of the Settlement System in the Samara Volga Region in the Golden Horde Period

2021 ◽  
Vol 2 (36) ◽  
pp. 178-192
Author(s):  
Anna F. Kochkina ◽  
◽  
Dmitriy A. Stashenkov ◽  
Keyword(s):  
Volga Region ◽  
Left Bank ◽  
Volga River ◽  
Middle Volga Region ◽  
Eastern Zone ◽  
Territorial Structure ◽  
The Usa ◽  
Northern Zone ◽  
The Right

Among the sites of the Golden Horde period of the Middle Volga region, a special group consists of the sites of the Samara region, which includes the Samara Luka of the Volga and the basins of the Usa, Samara, Kinel, and Sok rivers. The analysis of the topography of the sites in the context of the natural and geographical characteristics of the area under consideration allowed us to determine its territorial structure. Based on the features of settlement placement, a zonal zoning model is proposed for the right-bank and left-bank sections of the Samara Volga region. On the territory of the righ-bank district, three microdistricts are allocated: 1) Usa microdistrict;, 2) microdistrict of the inner part of the Samara Luka; 3) microdistrict of the Syzranka River basin. In the left-bank, taking into account the modern data of the territory, six microdistricts can be distinguished. 1) Northern на trans-Volga microdistrict located in the northern zone close to the bank of the Volga River; 2) Samara-Volga microdistrict, including sites of the mouth of the Samara River, Sok, the bank of the Volga River; 3) Sok microdistrict, sites are located along the bed of the Sok and Kondurcha rivers; 4) Kinel microdistrict, sites are located along the river Bolshoi Kinel to the confluence with the Samara River; 5) Samara steppe microdistrict in the eastern zone of the region under consideration; 6) Southern trans-Volga microdistrict. Each microdistrict is characterized by a corresponding supporting framework of settlement, which is associated with the peculiarities of the functioning of sites.

A preliminary analysis of phylogenetic relationships and biogeography of the dangerously venomous Carpet Vipers, Echis (Squamata, Serpentes, Viperidae) based on mitochondrial DNA sequences

2009 ◽  
Vol 30 (2) ◽  
pp. 273-282 ◽  
Author(s):  
Michael Robinson ◽  
Nicholas Arnold ◽  
Salvador Carranza
Keyword(s):  
Mitochondrial Dna ◽  
North Africa ◽  
Dna Sequences ◽  
Preliminary Analysis ◽  
Climatic Changes ◽  
Species Status ◽  
Separate Species ◽  
Late Pliocene ◽  
The North ◽  
Oman Mountains

AbstractPhylogenetic analysis of 1117 bp of mitochondrial DNA sequences (731 bp of cytochrome b and 386 bp of 16S rRNA) indicate that Echis consists of four main clades: E. ocellatus, and the E. coloratus, E. pyramidum, and E. carinatus groups. In the E. coloratus group, E. coloratus itself shows substantial genetic divergence from E. omanensis, corroborating their separate species status. In the E. pyramidum clade, E. pyramidum from Egypt and E. leucogaster from West Africa are genetically very similar, even though samples are separated by 4000 km. South Arabian populations of the E. pyramidum group are much better differentiated from these and two species may be present, animals from Dhofar, southern Oman probably being referable to E. khosatzkii. In the E. carinatus group, specimens of E. carinatus sochureki and E. multisquamatus are very similar in their DNA. The phylogeny indicates that the split between the main groups of Echis was followed by separation of African and Arabian members of the E. pyramidum group, and of E. coloratus and E. omanensis. The last disjunction probably took place at the lowlands that run southwest of the North Oman mountains, which are likely to have been intermittently covered by marine incursions; they also separate the E. pyramidum and E. carinatus groups and several sister taxa of other reptiles. The E. carinatus group may have spread quite recently from North Oman into its very extensive southwest Asian range, and there appears to have been similar expansion of E. pyramidum (including E. leucogaster) in North Africa. Both these events are likely to be associated with the marked climatic changes of the Pleistocene or late Pliocene. Similar dramatic expansions have also recently occurred in three snake species in Iberia.

Nuclear and plastid DNA sequences reveal complex reticulate patterns in Australian water-lilies (Nymphaea subgenus Anecphya, Nymphaeaceae)

2008 ◽  
Vol 21 (4) ◽  
pp. 229 ◽  
Author(s):  
Cornelia Löhne ◽  
Thomas Borsch ◽  
Surrey W. L. Jacobs ◽  
C. Barre Hellquist ◽  
John H. Wiersema
Keyword(s):  
Dna Sequences ◽  
Incomplete Lineage Sorting ◽  
Phylogenetic Signal ◽  
Plastid Dna ◽  
Molecular Data ◽  
Lineage Sorting ◽  
Australian Water ◽  
Length Polymorphisms ◽  
Close Relationship ◽  
Nuclear Its

This study represents the first comprehensive analysis of phylogenetic relationships within the Australian water-lilies, Nymphaea subg. Anecphya. Our 51-accession dataset covers all 10 species of the subgenus, except the newly described N. alexii, and includes information from the nuclear ITS as well as from the chloroplast trnT–trnF region. The results show that molecular data are consistent with morphology, because the subdivision of subg. Anecphya into two major clades, a large-seeded and a small-seeded group, could be confirmed. Within the large-seeded group, Nymphaea atrans and N. immutabilis seem to form one clade, whereas samples of N. gigantea, N. georginae, N. macrosperma and N. carpentariae form another. Relationships within the small-seeded group, containing all samples of N. violacea, N. elleniae and N. hastifolia, are less clear, since the trees obtained from the chloroplast and the nuclear marker are incongruent. The samples of N. violacea do not form a monophyletic group in each of the trees, but—at least in the ITS tree—group with either N. elleniae or N. hastifolia/Ondinea, respectively. Polymorphisms among ITS paralogues, i.e. substitutions at single nucleotide positions and length polymorphisms, have been observed in some samples of N. violacea. This fact as well as the incongruent phylogenetic signal obtained from the chloroplast and the nuclear genomes point to recent hybridisation or introgression in this group. Remarkably, Ondinea purpurea is resolved within the small-seeded group by both markers and seems to have a close relationship to N. hastifolia. Although incomplete lineage sorting cannot be fully excluded to explain high variability in N. violacea, molecular data potentially hint to a case of still imperfect taxonomy.

Molecular phylogeny and geographic variation of Malagasy iguanas (Oplurus and Chalarodon)

2008 ◽  
Vol 29 (3) ◽  
pp. 319-327 ◽  
Author(s):  
Miguel Vences ◽  
Frank Glaw ◽  
Katharina Wollenberg ◽  
Tobias Münchenberg
Keyword(s):  
Dna Sequences ◽  
Taxonomic Revision ◽  
Rrna Gene ◽  
Separate Species ◽  
North West ◽  
The North ◽  
Sister Clade ◽  
Grande Comore ◽  
Different Populations ◽  
Mitochondrial 16S Rrna Gene

Abstract The iguanid subfamily Oplurinae consists of seven species of small to medium-sized, arboreal, sand-dwelling or rock-dwelling lizards endemic to Madagascar and the Comoros, belonging to the genera Oplurus and Chalarodon. We here present the first complete molecular species-level phylogeny for Oplurinae based on DNA sequences (865 bp) of the mitochondrial 16S rRNA gene and the nuclear c-mos gene. Our study is based on 52 specimens sampled from different populations in Madagascar and includes the geographically isolated population from Grande Comore, hitherto considered as subspecies Oplurus cuvieri comorensis or even as a separate species O. comorensis. Our results confirm that, within the genus Oplurus, the largely arboreal O. cuvieri and O. cyclurus form the sister clade to the remaining, more rock-dwelling species. Within the latter lineage, Oplurus quadrimaculatus is placed most basal, O. fierinensis and O. grandidieri are closely related sister species with high support, and O. saxicola is sister to the fierinensis/grandidieri lineage. Within the arboreal Oplurus, the Comoran sample shows no genetic differentiation relative to O. cuvieri populations from the North West and Sambirano regions of Madagascar, indicating that this population should not be considered as a separate species. In the monotypic genus Chalarodon, we discovered deep genetic divergences among populations of C. madagascariensis indicating the presence of a previously unrecognized cryptic species and the need for taxonomic revision.

Investor-State Dispute Settlement under NAFTA Chapter 11: The Shape of Things to Come?

1998 ◽  
Vol 35 ◽  
pp. 263-290
Author(s):  
J. Anthony VanDuzer
Keyword(s):  
Free Trade Agreement ◽  
Dispute Settlement ◽  
Trade Agreement ◽  
Minimum Standards ◽  
The North ◽  
State Behaviour ◽  
Nafta Chapter 11 ◽  
To Come ◽  
The Right

SummaryRecently, there has been a proliferation of international agreements imposing minimum standards on states in respect of their treatment of foreign investors and allowing investors to initiate dispute settlement proceedings where a state violates these standards. Of greatest significance to Canada is Chapter 11 of the North American Free Trade Agreement, which provides both standards for state behaviour and the right to initiate binding arbitration. Since 1996, four cases have been brought under Chapter 11. This note describes the Chapter 11 process and suggests some of the issues that may arise as it is increasingly resorted to by investors.

Why Has There Been No People’s Power Rebellion in North Korea?

2018 ◽  
pp. 1-34
Author(s):  
Andrew Jackson
Keyword(s):  
Rural Areas ◽  
North Korea ◽  
Large Scale ◽  
Political Elite ◽  
Information Control ◽  
Al Jazeera ◽  
The North ◽  
New Information ◽  
Effective System ◽  
The Right

One scenario put forward by researchers, political commentators and journalists for the collapse of North Korea has been a People’s Power (or popular) rebellion. This paper analyses why no popular rebellion has occurred in the DPRK under Kim Jong Un. It challenges the assumption that popular rebellion would happen because of widespread anger caused by a greater awareness of superior economic conditions outside the DPRK. Using Jack Goldstone’s theoretical expla-nations for the outbreak of popular rebellion, and comparisons with the 1989 Romanian and 2010–11 Tunisian transitions, this paper argues that marketi-zation has led to a loosening of state ideological control and to an influx of infor-mation about conditions in the outside world. However, unlike the Tunisian transitions—in which a new information context shaped by social media, the Al-Jazeera network and an experience of protest helped create a sense of pan-Arab solidarity amongst Tunisians resisting their government—there has been no similar ideology unifying North Koreans against their regime. There is evidence of discontent in market unrest in the DPRK, although protests between 2011 and the present have mostly been in defense of the right of people to support themselves through private trade. North Koreans believe this right has been guaranteed, or at least tacitly condoned, by the Kim Jong Un government. There has not been any large-scale explosion of popular anger because the state has not attempted to crush market activities outright under Kim Jong Un. There are other reasons why no popular rebellion has occurred in the North. Unlike Tunisia, the DPRK lacks a dissident political elite capable of leading an opposition movement, and unlike Romania, the DPRK authorities have shown some flexibility in their anti-dissent strategies, taking a more tolerant approach to protests against economic issues. Reduced levels of violence during periods of unrest and an effective system of information control may have helped restrict the expansion of unrest beyond rural areas.

Traditionalism and politics: A case study of Northern Nigeria

1967 ◽  
Vol 2 (4) ◽  
pp. 509-524 ◽  
Author(s):  
B. J. O. Dudley
Keyword(s):  
Social Change ◽  
Local Government ◽  
Status Quo ◽  
Political Elite ◽  
High Time ◽  
The Political ◽  
Northern Nigeria ◽  
The North ◽  
The Right

In the debate on the Native Authority (Amendment) Law of 1955, the late Premier of the North, Sir Ahmadu Bello, Sardauna of Sokoto, replying to the demand that ‘it is high time in the development of local government systems in this Region that obsolete and undemocratic ways of appointing Emirs’ Councils should close’, commented that ‘the right traditions that we have gone away from are the cutting off of the hands of thieves, and that has caused a lot of thieving in this country. Why should we not be cutting (off) the hands of thieves in order to reduce thieving? That is logical and it is lawful in our tradition and custom here.’ This could be read as a defence against social change, a recrudescence of ‘barbarism’ after the inroads of pax Britannica, and a plea for the retention of the status quo and the entrenched privilege of the political elite.

Sign in / Sign up

Export Citation Format

Share Document