scholarly journals Substantial genetic divergence and lack of recent gene flow support cryptic speciation in a colour polymorphic bumble bee ( Bombus bifarius ) species complex

2020 ◽  
Vol 45 (3) ◽  
pp. 635-652 ◽  
Author(s):  
Guillaume Ghisbain ◽  
Jeffrey D. Lozier ◽  
Sarthok Rasique Rahman ◽  
Briana D. Ezray ◽  
Li Tian ◽  
...  
Keyword(s):  
Gene Flow ◽  
Genetic Divergence ◽  
Species Complex ◽  
Bumble Bee ◽  
Cryptic Speciation ◽  
Recent Gene Flow

scholarly journals Cytogenetic and DNA barcoding reveals high divergence within the trahira, Hoplias malabaricus (Characiformes: Erythrinidae) from the lower Amazon River

2013 ◽  
Vol 11 (2) ◽  
pp. 459-466 ◽  
Author(s):  
Diego Ferreira Marques ◽  
Fabíola Araújo dos Santos ◽  
Simoni Santos da Silva ◽  
Iracilda Sampaio ◽  
Luís Reginaldo Ribeiro Rodrigues
Keyword(s):  
Dna Barcoding ◽  
Genetic Divergence ◽  
Species Complex ◽  
Dna Barcode ◽  
Amazon River ◽  
South American ◽  
Cryptic Speciation ◽  
Dna Barcodes ◽  
Hoplias Malabaricus ◽  
Complex Hypothesis

Molecular and cytogenetic data have provided evidence of cryptic speciation in the widespread South American trahira, Hoplias malabaricus. In the present study, karyotypes and DNA barcode sequences of specimens from seven populations inhabiting the lower Amazon River were analyzed in order to characterize the levels of genetic divergence within a single karyomorph. All the specimens presented karyotypes with 2n = 40 chromosomes (20m+20sm) that were consistent with the species' C karyomorph. The DNA barcodes revealed six haplogroups, with clear divergence between populations from Brazil and Argentina. The results support the species complex hypothesis and indicate that a single karyomorph of H. malabaricus may harbor more than one species

scholarly journals Contrasting Historical and Recent Gene Flow among African Buffalo Herds in the Caprivi Strip of Namibia

2013 ◽  
Vol 104 (2) ◽  
pp. 172-181 ◽  
Author(s):  
Clinton W. Epps ◽  
Jessica A. Castillo ◽  
Anne Schmidt-Küntzel ◽  
Pierre du Preez ◽  
Greg Stuart-Hill ◽  
...  
Keyword(s):  
Gene Flow ◽  
African Buffalo ◽  
Recent Gene Flow ◽  
Caprivi Strip

scholarly journals Widespread gene flow between oceans in a pelagic seabird species complex

2017 ◽  
Vol 26 (20) ◽  
pp. 5716-5728 ◽  
Author(s):  
Katherine A. Booth Jones ◽  
Malcolm A. C. Nicoll ◽  
Claire Raisin ◽  
Deborah A. Dawson ◽  
Helen Hipperson ◽  
...  
Keyword(s):  
Gene Flow ◽  
Species Complex ◽  
Seabird Species ◽  
Pelagic Seabird

scholarly journals Substantial genetic divergence between morphologically indistinguishable populations of Fasciola suggests the possibility of cryptic speciation

2012 ◽  
Vol 42 (13-14) ◽  
pp. 1193-1199 ◽  
Author(s):  
S.M. Walker ◽  
P.A. Prodöhl ◽  
E.M. Hoey ◽  
I. Fairweather ◽  
R.E.B. Hanna ◽  
...  
Keyword(s):  
Genetic Divergence ◽  
Cryptic Speciation

scholarly journals Genetic divergence correlates with the contemporary landscape in populations of Slimy Salamander (Plethodon glutinosus) species complex across the lower Piedmont and Coastal Plain of the southeastern United States

2018 ◽  
Vol 96 (11) ◽  
pp. 1244-1254 ◽  
Author(s):  
Walter H. Smith ◽  
Jessica A. Wooten ◽  
Carlos D. Camp ◽  
Dirk J. Stevenson ◽  
John B. Jensen ◽  
...  
Keyword(s):  
South Carolina ◽  
Genetic Distance ◽  
Principal Components ◽  
Coastal Plain ◽  
Genetic Divergence ◽  
Species Complex ◽  
Isolation By Distance ◽  
Geographic Distance ◽  
Plethodon Glutinosus ◽  
Isolation By Environment

A primary goal of landscape genetics is to elucidate factors associated with genetic structure among populations. Among the important patterns identified have been isolation by distance (IBD), isolation by barrier (IBB), and isolation by environment (IBE). We tested hypotheses relating each of these possible patterns to genetic divergence in the Slimy Salamander (Plethodon glutinosus (Green, 1818)) species complex across the lower Piedmont and Coastal Plain of Georgia, USA, and adjacent areas of South Carolina, USA. We sequenced 2148 total bp, including three regions of the mitochondrial genome and a nuclear intron, and related genetic distance to GIS-derived surrogate variables representing possible IBD (geographic distance), IBE (principal components of 19 climate variables, watershed, and normalized difference vegetation index (NDVI)), and IBB (streams of fourth order and higher). Multiple matrix regression with randomization analysis indicated significant relationships between genetic distance and two principal components of climate, as well as NDVI. These results support roles for environment (IBE) in helping to drive genetic divergence in this group of salamanders. The absence of a significant influence of IBD and IBB was surprising. It is possible that the signal effects of geographic distance and barriers on genetic divergence may have been erased by more recent responses to the environment.

Taxonomic revision of the Square-tailed Drongo species complex (Passeriformes: Dicruridae) with description of a new species from western Africa

Zootaxa ◽  
2018 ◽  
Vol 4438 (1) ◽  
pp. 105 ◽  
Author(s):  
JÉRÔME FUCHS ◽  
MORY DOUNO ◽  
RAURI C.K. BOWIE ◽  
JON FJELDSÅ
Keyword(s):  
New Species ◽  
Genetic Divergence ◽  
Species Complex ◽  
Morphological Character ◽  
Taxonomic Revision ◽  
Genetic Data ◽  
Sister Species ◽  
Western Africa ◽  
Gallery Forests ◽  
A New Species

We describe a new species of drongo in the Square-tailed Drongo (Dicrurus ludwigii) complex using a combination of biometric and genetic data. The new species differs from previously described taxa in the Square-tailed Drongo complex by possessing a significantly heavier bill and via substantial genetic divergence (6.7%) from its sister-species D. sharpei. The new species is distributed across the gallery forests of coastal Guinea, extending to the Niger and Benue Rivers of Nigeria. We suspect that this taxon was overlooked by previous avian systematists because they either lacked comparative material from western Africa or because the key diagnostic morphological character (bill characteristics) was not measured. We provide an updated taxonomy of the Square-tailed Drongo species complex. 

Passive larval transport explains recent gene flow in a Mediterranean gorgonian

Coral Reefs ◽  
2018 ◽  
Vol 37 (2) ◽  
pp. 495-506 ◽  
Author(s):  
Mariana Padrón ◽  
Federica Costantini ◽  
Sandra Baksay ◽  
Lorenzo Bramanti ◽  
Katell Guizien
Keyword(s):  
Gene Flow ◽  
Larval Transport ◽  
Recent Gene Flow

scholarly journals Conservative plumage masks extraordinary phylogenetic diversity in the Grallaria rufula (Rufous Antpitta) complex of the humid Andes

The Auk ◽  
2020 ◽  
Vol 137 (3) ◽  
Author(s):  
R Terry Chesser ◽  
Morton L Isler ◽  
Andrés M Cuervo ◽  
C Daniel Cadena ◽  
Spencer C Galen ◽  
...  
Keyword(s):  
Mitochondrial Dna ◽  
Genetic Variation ◽  
Genetic Differentiation ◽  
Genetic Divergence ◽  
Phylogenetic Diversity ◽  
Biological Species ◽  
Cryptic Speciation ◽  
Species Groups ◽  
River Valleys ◽  
Prime Location

Abstract The Grallaria rufula complex is currently considered to consist of 2 species, G. rufula (Rufous Antpitta) and G. blakei (Chestnut Antpitta). However, it has been suggested that the complex, populations of which occur in humid montane forests from Venezuela to Bolivia, comprises a suite of vocally distinct yet morphologically cryptic species. We sequenced nuclear and mitochondrial DNA for 80 individuals from across the distribution of the complex to determine the extent of genetic variation between and within described taxa. Our results revealed 18 geographically coherent clades separated by substantial genetic divergence: 14 within rufula, 3 within blakei, and 1 corresponding to G. rufocinerea (Bicolored Antpitta), a species with distinctive plumage found to be nested within the complex. Neither G. rufula nor G. blakei as presently defined was monophyletic. Although 6 of the 7 recognized subspecies of G. rufula were monophyletic, several subspecies contained substantial genetic differentiation. Genetic variation was largely partitioned across recognized geographic barriers, especially across deep river valleys in Peru and Colombia. Coalescent modeling identified 17 of the 18 clades as significantly differentiated lineages, whereas analyses of vocalizations delineated 16 biological species within the complex. The G. rufula complex seems unusually diverse even among birds of the humid Andes, a prime location for cryptic speciation; however, the extent to which other dispersal-limited Andean species groups exhibit similar degrees of cryptic differentiation awaits further study.

Genetic variability and population structure of some Iranian Salvia limbata C. A. Mey. populations

2020 ◽  
Vol 29 ◽  
pp. 56-65 ◽  
Author(s):  
Seyed M. Talebi ◽  
Alex V. Matsyura
Keyword(s):  
Gene Flow ◽  
Genetic Differentiation ◽  
Genetic Divergence ◽  
Modern Medicine ◽  
Variance Test ◽  
Adaptive Mutations ◽  
Ctab Method ◽  
Research Population ◽  
Nj Tree ◽  
Issr Primers

Salvia limbata is one of the aromatic herbs of Lamiaceae that naturally grows in different regions of Iran. This species has several usages in folk and modern medicine. In the current research, population genetic divergence and structure were evaluated in eight Iranian populations of this species. Nuclear genomes were extracted using CTAB method and amplified by ten ISSR primers. Parameters of genetic divergence changed among and within the examined populations. Percentage of among populations polymorphism was higher than within population ones in most of studied populations. It was supported by results of Analysis of Molecular Variance test, which revealed the large part of significant genetic variation belonged to among populations rather than within populations. In this regard, individuals of most populations were close together, while according to UPGMA tree, the studied populations were clustered into seven groups. STRUCTURE analysis and NJ tree produced similar results. The low rate of gene flow (Lm) and highest value of genetic differentiation (GST) confirmed the high genetic differentiation of the studied populations. Popart analysis revealed the occurrence of several mutations in order to adapt populations with environmental conditions. The occurrence of adaptive mutations and gene flow disruption due to habitat separation seems to differentiate the populations.

Sign in / Sign up

Export Citation Format

Share Document