Mitochondrial DNA Variation Indicates Gene Flow across a Zone of Known Secondary Contact between Two Subspecies of the Brown-Headed Cowbird

The Condor ◽  
1991 ◽  
Vol 93 (1) ◽  
pp. 185-189 ◽  
Author(s):  
Robert C. Fleischer ◽  
Stephen I. Rothstein ◽  
Linda S. Miller
Keyword(s):  
Mitochondrial Dna ◽  
Gene Flow ◽  
Secondary Contact ◽  
Dna Variation

Mitochondrial DNA variation within and among populations of the mosquito Aedes albopictus

Genome ◽  
1991 ◽  
Vol 34 (2) ◽  
pp. 288-292 ◽  
Author(s):  
Srinivas Kambhampati ◽  
Karamjit S. Rai
Keyword(s):  
Mitochondrial Dna ◽  
Genetic Variation ◽  
Hong Kong ◽  
Gene Flow ◽  
Genetic Structure ◽  
Aedes Albopictus ◽  
Range Expansion ◽  
Dna Variation ◽  
Restriction Fragment Polymorphism ◽  
Mtdna Polymorphism

A survey of restriction fragment polymorphism in mitochondrial DNA (mtDNA) of 17 populations of the mosquito Aedes albopictus was undertaken. The mtDNA size was estimated to be about 17.5 kbp. The level of polymorphism was low, with over 99% of the fragments being shared in common among the 17 populations. Three populations, Mauritius, Singapore, and Hong Kong, contained individuals with both the ancestral and novel mtDNA haplotypes. We conclude that the low level of mtDNA polymorphism in A. albopictus is a result of recent range expansion and that the mixture of haplotypes is a likely result of human-aided gene flow among populations.Key words: mitochondrial DNA, genetic variation, genetic structure, Aedes albopictus.

scholarly journals MITOCHONDRIAL-DNA VARIATION IN THE CRESTED NEWT SUPERSPECIES: LIMITED CYTOPLASMIC GENE FLOW AMONG SPECIES

Evolution ◽  
1989 ◽  
Vol 43 (1) ◽  
pp. 88-104 ◽  
Author(s):  
Graham P. Wallis ◽  
J. W. Arntzen
Keyword(s):  
Mitochondrial Dna ◽  
Gene Flow ◽  
Dna Variation ◽  
Crested Newt

Mitochondrial-DNA Variation in the Crested Newt Superspecies: Limited Cytoplasmic Gene flow Among Species

Evolution ◽  
1989 ◽  
Vol 43 (1) ◽  
pp. 88 ◽  
Author(s):  
Graham P. Wallis ◽  
J. W. Arntzen
Keyword(s):  
Mitochondrial Dna ◽  
Gene Flow ◽  
Dna Variation ◽  
Crested Newt

scholarly journals GENE FLOW VERSUS LOCAL ADAPTATION IN THE NORTHERN ACORN BARNACLE, SEMIBALANUS BALANOIDES: INSIGHTS FROM MITOCHONDRIAL DNA VARIATION

Evolution ◽  
2001 ◽  
Vol 55 (10) ◽  
pp. 1972-1979 ◽  
Author(s):  
Alice F. Brown ◽  
Lisa M. Kann ◽  
David M. Rand
Keyword(s):  
Mitochondrial Dna ◽  
Gene Flow ◽  
Local Adaptation ◽  
Semibalanus Balanoides ◽  
Dna Variation ◽  
Acorn Barnacle

Brief communication: Mitochondrial DNA variation suggests extensive gene flow from Polynesian ancestors to indigenous Melanesians in the northwestern Bismarck Archipelago

2006 ◽  
Vol 130 (4) ◽  
pp. 551-556 ◽  
Author(s):  
Jun Ohashi ◽  
Izumi Naka ◽  
Katsushi Tokunaga ◽  
Tsukasa Inaoka ◽  
Yuji Ataka ◽  
...  
Keyword(s):  
Mitochondrial Dna ◽  
Gene Flow ◽  
Dna Variation ◽  
Bismarck Archipelago

scholarly journals Thermal adaptation and clinal mitochondrial DNA variation of European anchovy

2014 ◽  
Vol 281 (1792) ◽  
pp. 20141093 ◽  
Author(s):  
Gonçalo Silva ◽  
Fernando P. Lima ◽  
Paulo Martel ◽  
Rita Castilho
Keyword(s):  
Mitochondrial Dna ◽  
Natural Populations ◽  
Thermal Adaptation ◽  
Secondary Contact ◽  
Nutrient Concentrations ◽  
Clinal Variation ◽  
Oxygen Utilization ◽  
Low Frequencies ◽  
Dna Variation ◽  
European Anchovy

Natural populations of widely distributed organisms often exhibit genetic clinal variation over their geographical ranges. The European anchovy, Engraulis encrasicolus , illustrates this by displaying a two-clade mitochondrial structure clinally arranged along the eastern Atlantic. One clade has low frequencies at higher latitudes, whereas the other has an anti-tropical distribution, with frequencies decreasing towards the tropics. The distribution pattern of these clades has been explained as a consequence of secondary contact after an ancient geographical isolation. However, it is not unlikely that selection acts on mitochondria whose genes are involved in relevant oxidative phosphorylation processes. In this study, we performed selection tests on a fragment of 1044 bp of the mitochondrial cytochrome b gene using 455 individuals from 18 locations. We also tested correlations of six environmental features: temperature, salinity, apparent oxygen utilization and nutrient concentrations of phosphate, nitrate and silicate, on a compilation of mitochondrial clade frequencies from 66 sampling sites comprising 2776 specimens from previously published studies. Positive selection in a single codon was detected predominantly (99%) in the anti-tropical clade and temperature was the most relevant environmental predictor, contributing with 59% of the variance in the geographical distribution of clade frequencies. These findings strongly suggest that temperature is shaping the contemporary distribution of mitochondrial DNA clade frequencies in the European anchovy.

scholarly journals GENE FLOW AND MITOCHONDRIAL DNA VARIATION IN THE KILLIFISH, FUNDULUS HETEROCLITUS

Evolution ◽  
1991 ◽  
Vol 45 (5) ◽  
pp. 1147-1161 ◽  
Author(s):  
Bonnie L. Brown ◽  
Robert W. Chapman
Keyword(s):  
Mitochondrial Dna ◽  
Gene Flow ◽  
Fundulus Heteroclitus ◽  
Dna Variation

MITOCHONDRIAL DNA VARIATION AND MATERNAL GENE FLOW AMONG HUMPBACK WHALES OF THE SOUTHERN HEMISPHERE

1998 ◽  
Vol 14 (4) ◽  
pp. 721-737 ◽  
Author(s):  
C. S. Baker ◽  
L. Florez-Gonzalez ◽  
B. Abernethy ◽  
H. C. Rosenbaum ◽  
R. W. Slade ◽  
...  
Keyword(s):  
Mitochondrial Dna ◽  
Gene Flow ◽  
Southern Hemisphere ◽  
Humpback Whales ◽  
Dna Variation ◽  
Maternal Gene

Strong population structure and limited gene flow between Yellow-billed Ducks and Mallards in southern Africa

The Condor ◽  
2019 ◽  
Author(s):  
Joshua I Brown ◽  
Philip Lavretsky ◽  
Graeme S Cumming ◽  
Jeffrey L Peters
Keyword(s):  
Mitochondrial Dna ◽  
Gene Flow ◽  
Southern Africa ◽  
Secondary Contact ◽  
Nuclear Markers ◽  
Nuclear Introns ◽  
Contemporary Gene Flow ◽  
Limited Gene Flow ◽  
Genetic Swamping ◽  
Evolutionary Consequences

AbstractSecondary contact and hybridization between recently diverged taxa have been increasing due to anthropogenic changes to the environment. Determining whether secondary contact leads to gene flow between species is important for understanding both the evolutionary consequences of such events (i.e. genetic swamping, speciation reversal, hybrid speciation) and for establishing proper conservation measures. Mallards (Anas platyrhynchos), which natively have a Holarctic distribution, have been introduced nearly worldwide due to game-farm and domestic pet releases. Their expanding range has resulted in secondary contact and increased incidences of hybridization with many closely related Mallard-like ducks that comprise the Mallard complex. Here, we assay molecular diversity for 19 nuclear introns and the mitochondrial DNA for wild Mallards (n = 50) across their Holarctic range and Yellow-billed Ducks (n = 30–75; Anas undulata) from southern Africa to determine population genetic structure and test for evidence of Mallard introgression into Yellow-billed Ducks. While we found limited support for contemporary gene flow across nuclear markers, we provide evidence from mitochondrial DNA that best supports ancient gene flow between Yellow-billed Ducks and Mallards. Yellow-billed Ducks best fit a single population at nuclear markers but show some location-specific mtDNA structure that suggests recent founder or bottleneck events. Although we find that introgression from Mallards into Yellow-billed Duck is limited, Yellow-billed Duck populations should be monitored to determine if expanding feral Mallard populations in southern Africa are increasing introgression.

Gene Flow and Mitochondrial DNA Variation in the Killifish, Fundulus heteroclitus

Evolution ◽  
1991 ◽  
Vol 45 (5) ◽  
pp. 1147 ◽  
Author(s):  
Bonnie L. Brown ◽  
Robert W. Chapman
Keyword(s):  
Mitochondrial Dna ◽  
Gene Flow ◽  
Fundulus Heteroclitus ◽  
Dna Variation
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