scholarly journals A coalescent framework for comparing alternative models of population structure with genetic data: evolution of Celebes toads

2008 ◽  
Vol 4 (4) ◽  
pp. 430-433 ◽  
Author(s):  
Ben J Evans ◽  
Jimmy A McGuire ◽  
Rafe M Brown ◽  
Noviar Andayani ◽  
Jatna Supriatna
Keyword(s):  
Population Structure ◽  
Habitat Fragmentation ◽  
Nuclear Dna ◽  
Sulawesi Macaque ◽  
Species Overlap ◽  
Interspecific Divergence ◽  
On This Island ◽  
Stochastic Events ◽  
Multiple Species ◽  
Data Evolution

Isolation of populations eventually leads to divergence by genetic drift, but if connectivity varies over time, its impact on diversification may be difficult to discern. Even when the habitat patches of multiple species overlap, differences in their demographic parameters, molecular evolution and stochastic events contribute to differences in the magnitude and distribution of their genetic variation. The Indonesian island of Sulawesi, for example, harbours a suite of endemic species whose intraspecific differentiation or interspecific divergence may have been catalysed by habitat fragmentation. To further test this hypothesis, we have performed phylogenetic and coalescent-based analyses on molecular variation in mitochondrial and nuclear DNA of the Celebes toad ( Bufo celebensis ). Results support a role for habitat fragmentation that led to a population structure in these toads that closely matches distributions of Sulawesi macaque monkeys. Habitat fragmentation, therefore, may also have affected other groups on this island.

Multilocus nuclear DNA markers reveal population structure and demography ofAnopheles minimus

2014 ◽  
Vol 23 (22) ◽  
pp. 5599-5618 ◽  
Author(s):  
Jyotsana Dixit ◽  
Uraiwan Arunyawat ◽  
Ngo Thi Huong ◽  
Aparup Das
Keyword(s):  
Population Structure ◽  
Dna Markers ◽  
Nuclear Dna ◽  
Nuclear Dna Markers

Molecular phylogenetic analysis of subfamilial placement of Haplotropis Saussure, 1888 (Orthoptera: Pamphagidae) based on mitochondrial and nuclear DNA markers

Zootaxa ◽  
2019 ◽  
Vol 4551 (5) ◽  
pp. 530
Author(s):  
IGOR SUKHIKH ◽  
ALEXANDER BLINOV ◽  
ALEXANDER BUGROV
Keyword(s):  
Phylogenetic Analysis ◽  
Dna Markers ◽  
Nuclear Dna ◽  
Mitochondrial Genes ◽  
Nuclear Region ◽  
The Family ◽  
Molecular Phylogenetic ◽  
Nuclear Dna Markers ◽  
Multiple Species ◽  
Small Genus

The genus Haplotropis Sauss. is a relatively small genus in the family Pamphagidae (Orthoptera: Caelifera). Historically, there has been a discussion on the placement of this genus, whether it belongs in the subfamily Pamphaginae or in the subfamily Thrinchinae. Here we present a phylogenetic analysis of nucleotide sequences of two mitochondrial genes (COI, COII) and the ITS2 rRNA nuclear region of multiple species of the family Pamphagidae and related taxa. Our results clearly support the placement of the genus Haplotropis, and other species of the tribe Haplotropidini, in the subfamily Thrinchinae. 

scholarly journals Structure and phylogeography of two tropical predators, spinner ( Stenella longirostris ) and pantropical spotted ( S. attenuata ) dolphins, from SNP data

2018 ◽  
Vol 5 (4) ◽  
pp. 171615 ◽  
Author(s):  
Matthew S. Leslie ◽  
Phillip A. Morin
Keyword(s):  
Population Structure ◽  
Pacific Ocean ◽  
Nuclear Dna ◽  
Population Level ◽  
Genetic Connectivity ◽  
Nucleotide Polymorphisms ◽  
Stenella Longirostris ◽  
Spinner Dolphin ◽  
Spinner Dolphins ◽  
Almost All

Little is known about global patterns of genetic connectivity in pelagic dolphins, including how circumtropical pelagic dolphins spread globally following the rapid and recent radiation of the subfamily delphininae. In this study, we tested phylogeographic hypotheses for two circumtropical species, the spinner dolphin ( Stenella longirostris ) and the pantropical spotted dolphin ( Stenella attenuata ), using more than 3000 nuclear DNA single nucleotide polymorphisms (SNPs) in each species. Analyses for population structure indicated significant genetic differentiation between almost all subspecies and populations in both species. Bayesian phylogeographic analyses of spinner dolphins showed deep divergence between Indo-Pacific, Atlantic and eastern tropical Pacific Ocean (ETP) lineages. Despite high morphological variation, our results show very close relationships between endemic ETP spinner subspecies in relation to global diversity. The dwarf spinner dolphin is a monophyletic subspecies nested within a major clade of pantropical spinner dolphins from the Indian and western Pacific Ocean populations. Population-level division among the dwarf spinner dolphins was detected—with the northern Australia population being very different from that in Indonesia. In contrast to spinner dolphins, the major boundary for spotted dolphins is between offshore and coastal habitats in the ETP, supporting the current subspecies-level taxonomy. Comparing these species underscores the different scale at which population structure can arise, even in species that are similar in habitat (i.e. pelagic) and distribution.

scholarly journals Population structure of edible dormouse in Poland: the role of habitat fragmentation and implications for conservation

2015 ◽  
Vol 298 (3) ◽  
pp. 217-224 ◽  
Author(s):  
M. Herdegen ◽  
J. Radwan ◽  
U. Sobczynska ◽  
M. Dabert ◽  
D. Konjević ◽  
...  
Keyword(s):  
Population Structure ◽  
Habitat Fragmentation ◽  
Edible Dormouse

scholarly journals Incipient species or social polymorphism? Diversity in the desert ant Cataglyphis

2018 ◽  
Author(s):  
Tali Reiner Brodetzki ◽  
Shani Inbar ◽  
Pnina Cohen ◽  
Serge Aron ◽  
Eyal Privman ◽  
...  
Keyword(s):  
Nuclear Dna ◽  
Hot Spot ◽  
Single Species ◽  
Incipient Species ◽  
Desert Ant ◽  
Multi Method Approach ◽  
Multiple Species ◽  
High Level ◽  
Evolutionary Paths ◽  
And Behavior

Species are the fundamental units upon which evolutionary research is based. In insects, due to the high level of hybridization, the delimitation of such species can be challenging. The genus Cataglyphis presents a high level of diversification, making it an excellent model with which to study evolutionary paths. Israel appears to be a 'hot spot' for recent speciation in this genus. Although previous studies have described multiple species of Cataglyphis in Israel, a recent genetic study has questioned the existence of some of these historically described species. The present study focuses on an apparent species complex that is distinguishable by its mitochondrial DNA (and therefore named mitotypes) but not by its nuclear DNA. Using a multi-method approach (genetics, chemistry and behavior), we show that these mitotypes also differ in their social structures and are readily distinguishable by their cuticular hydrocarbons profiles. While the different mitotypes are in general allopatric, at our study site they all coexist but nonetheless maintain the observed differences between them. This raises many evolutionary questions: Are these incipient species that have diverged with gene flow, or is this a case of social and chemical polymorphism that is maintained within a single species.

scholarly journals Effects of habitat fragmentation on population structure and dynamics of the endangered plant Pterospermum kingtungense

2021 ◽  
Vol 29 (4) ◽  
pp. 449-455
Author(s):  
Guoping Yang ◽  
Tao Wu ◽  
Yunfen Geng ◽  
Xiaoshuang Li ◽  
Jiabo Hao ◽  
...  
Keyword(s):  
Population Structure ◽  
Habitat Fragmentation ◽  
Endangered Plant ◽  
Structure And Dynamics ◽  
Population Structure And Dynamics

scholarly journals Genomic Traces of the Fruit Fly Anastrepha obliqua Associated with Its Polyphagous Nature

Insects ◽  
2021 ◽  
Vol 12 (12) ◽  
pp. 1116
Author(s):  
Elkin Aguirre-Ramirez ◽  
Sandra Velasco-Cuervo ◽  
Nelson Toro-Perea
Keyword(s):  
Population Structure ◽  
Host Plant ◽  
Host Plants ◽  
Nuclear Dna ◽  
Mangifera Indica ◽  
Protein Families ◽  
Sympatric Populations ◽  
New Host ◽  
The Family ◽  
Anastrepha Obliqua

Anastrepha obliqua (Macquart) (Diptera: Tephritidae) is an important pest in the neotropical region. It is considered a polyphagous insect, meaning it infests plants of different taxonomic families and readily colonizes new host plants. The change to new hosts can lead to diversification and the formation of host races. Previous studies investigating the effect of host plants on population structure and selection in Anastrepha obliqua have focused on the use of data from the mitochondrial DNA sequence and microsatellite markers of nuclear DNA, and there are no analyses at the genomic level. To better understand this issue, we used a pooled restriction site-associated DNA sequencing (pooled RAD-seq) approach to assess genomic differentiation and population structure across sympatric populations of Anastrepha obliqua that infest three host plants—Spondias purpurea (red mombin), Mangifera indica (mango) of the family Anacardiaceae and Averrhoa carambola (carambola) of the family Oxalidaceae—in sympatric populations of the species Anastrepha obliqua of Inter-Andean Valley of the Cauca River in southwestern Colombia. Our results show genomic differentiation of populations from carambola compared to mango and red mombin populations, but the genetic structure was mainly established by geography rather than by the host plant. On the other hand, we identified 54 SNPs in 23 sequences significantly associated with the use of the host plant. Of these 23 sequences, we identified 17 candidate genes and nine protein families, of which four protein families are involved in the nutrition of these flies. Future studies should investigate the adaptive processes undergone by phytophagous insects in the Neotropics, using fruit flies as a model and state-of-the-art molecular tools.

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