scholarly journals Spatial pattern of genetic diversity in field populations of Fusarium incarnatum‐equiseti species complex

2021 ◽  
Author(s):  
Sephra N. Rampersad
Keyword(s):  
Genetic Diversity ◽  
Spatial Pattern ◽  
Species Complex

Sex‐linked genetic diversity and differentiation in a globally distributed avian species complex

2021 ◽  
Author(s):  
Drew R. Schield ◽  
Elizabeth S.C. Scordato ◽  
Chris C.R. Smith ◽  
Javan K. Carter ◽  
Sidi Imad Cherkaoui ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
Species Complex ◽  
Avian Species ◽  
Globally Distributed

scholarly journals Spatial pattern and genetic diversity estimates are linked in stochastic models of population differentiation

2000 ◽  
Vol 23 (3) ◽  
pp. 541-544 ◽  
Author(s):  
José Alexandre Felizola Diniz-Filho ◽  
Mariana Pires de Campos Telles
Keyword(s):  
Genetic Diversity ◽  
Spatial Pattern ◽  
Stochastic Models ◽  
Population Differentiation ◽  
Real Data ◽  
Population Heterogeneity ◽  
Data Set ◽  
Mantel’S Test ◽  
The Relationship ◽  
Diversity Estimates

In the present study, we used both simulations and real data set analyses to show that, under stochastic processes of population differentiation, the concepts of spatial heterogeneity and spatial pattern overlap. In these processes, the proportion of variation among and within a population (measured by G ST and 1 - G ST, respectively) is correlated with the slope and intercept of a Mantel's test relating genetic and geographic distances. Beyond the conceptual interest, the inspection of the relationship between population heterogeneity and spatial pattern can be used to test departures from stochasticity in the study of population differentiation.

Resolving the Tetrastigma loheri s. l. Species Complex (Vitaceae) in the Philippines: No Evidence for Recognizing More than One Species

2021 ◽  
Author(s):  
Jasper John A. Obico ◽  
Julie F. Barcelona ◽  
Vincent Bonhomme ◽  
Marie Hale ◽  
Pieter B. Pelser
Keyword(s):  
Genetic Diversity ◽  
Species Complex ◽  
Species Recognition ◽  
Principal Component ◽  
The Philippines ◽  
Geometric Morphometric ◽  
Putative Species ◽  
Principal Coordinates ◽  
Multiple Species ◽  
Vegetative Characters

Tetrastigma loheri (Vitaceae) is a vine species native to Borneo and the Philippines. Because it is a commonly encountered forest species in the Philippines, T. loheri is potentially suitable for studying patterns of genetic diversity and connectivity among fragmented forestecosystems in various parts of this country. However, previous research suggests that T. loheri is part of a species complex in the Philippines (i.e. the T. loheri s. l. complex) that potentially also contains Philippine plants identified as T. diepenhorstii, T. philippinense, T. stenophyllum, andT. trifoliolatum. This uncertainty about its taxonomic delimitation can make it challenging to draw conclusions that are relevant to conservation from genetic studies using this species. Here, we tested the hypothesis that T. loheri s. l. is composed of more than one species in the Philippines.For this, we used generalized mixed Yule coalescent (GMYC) and Poisson tree process (PTP) species delimitation models to identify clades within DNA sequence phylogenies of T. loheri s. l. that might constitute species within this complex. Although these methods identified several putative species, these are statistically poorly supported and subsequent random forest analyses using a geometric morphometric leafshape dataset and several other vegetative characters did not result in the identification of characters that can be used to discriminate these putative species morphologically. Furthermore, the results of principal component and principal coordinates analyses of these data suggest the absence of morphological discontinuities within the species complex. Under a unified species concept that uses phylogenetic and morphological distinction as operational criteria for species recognition, we therefore conclude that the currently available data do not support recognizing multiple species in the T. loheri s. l. complex. This implies that T. loheri is best considered as a single, morphologically variable specieswhen used for studying patterns of genetic diversity and connectivity in the Philippines.

scholarly journals Genetic Diversity in the Paramecium aurelia Species Complex

2008 ◽  
Vol 26 (2) ◽  
pp. 421-431 ◽  
Author(s):  
F. Catania ◽  
F. Wurmser ◽  
A. A. Potekhin ◽  
E. Przybos ◽  
M. Lynch
Keyword(s):  
Genetic Diversity ◽  
Species Complex

scholarly journals Multiple markers, niche modelling, and bioregions analyses to evaluate the genetic diversity of a plant species complex

2017 ◽  
Vol 17 (1) ◽  
Author(s):  
Ana Lúcia A. Segatto ◽  
Maikel Reck-Kortmann ◽  
Caroline Turchetto ◽  
Loreta B. Freitas
Keyword(s):  
Genetic Diversity ◽  
Plant Species ◽  
Species Complex ◽  
Niche Modelling ◽  
Multiple Markers

scholarly journals Genetic Diversity of the Ralstonia solanacearum Species Complex in the Southwest Indian Ocean Islands

2017 ◽  
Vol 8 ◽  
Author(s):  
Noura Yahiaoui ◽  
Jean-Jacques Chéron ◽  
Santatra Ravelomanantsoa ◽  
Azali A. Hamza ◽  
Bobb Petrousse ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
Indian Ocean ◽  
Ralstonia Solanacearum ◽  
Species Complex ◽  
Southwest Indian Ocean ◽  
Ocean Islands

scholarly journals The Case for Adopting the “Species Complex” Nomenclature for the Etiologic Agents of Cryptococcosis

mSphere ◽  
2017 ◽  
Vol 2 (1) ◽  
Author(s):  
Kyung J. Kwon-Chung ◽  
John E. Bennett ◽  
Brian L. Wickes ◽  
Wieland Meyer ◽  
Christina A. Cuomo ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
Phylogenetic Analysis ◽  
Cryptococcus Neoformans ◽  
Species Complex ◽  
Intermediate Step ◽  
Separate Species ◽  
Content Type ◽  
Etiologic Agents ◽  
Genotypic Characteristics ◽  
Biological Differences

ABSTRACT Cryptococcosis is a potentially lethal disease of humans/animals caused by Cryptococcus neoformans and Cryptococcus gattii. Distinction between the two species is based on phenotypic and genotypic characteristics. Recently, it was proposed that C. neoformans be divided into two species and C. gattii into five species based on a phylogenetic analysis of 115 isolates. While this proposal adds to the knowledge about the genetic diversity and population structure of cryptococcosis agents, the published genotypes of 2,606 strains have already revealed more genetic diversity than is encompassed by seven species. Naming every clade as a separate species at this juncture will lead to continuing nomenclatural instability. In the absence of biological differences between clades and no consensus about how DNA sequence alone can delineate a species, we recommend using “Cryptococcus neoformans species complex” and “C. gattii species complex” as a practical intermediate step, rather than creating more species. This strategy recognizes genetic diversity without creating confusion.

scholarly journals Genetic diversity of a Botrytis cinerea cryptic species complex in Hungary

2012 ◽  
Vol 167 (5) ◽  
pp. 283-291 ◽  
Author(s):  
Éva Fekete ◽  
Erzsébet Fekete ◽  
László Irinyi ◽  
Levente Karaffa ◽  
Mariann Árnyasi ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
Cryptic Species ◽  
Botrytis Cinerea ◽  
Species Complex ◽  
Cryptic Species Complex

Genetic Diversity of the Cryptococcus gattii Species Complex in Mato Grosso State, Brazil

2019 ◽  
Vol 184 (1) ◽  
pp. 45-51 ◽  
Author(s):  
Fernanda Harumi Maruyama ◽  
Daphine Ariadne Jesus de Paula ◽  
Isabela de Godoy Menezes ◽  
Olívia Cometti Favalessa ◽  
Rosane Christine Hahn ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
Species Complex ◽  
Cryptococcus Gattii ◽  
Mato Grosso
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