scholarly journals Genetic analysis suggests extensive gene flow within and between catchments in a common and ecologically significant dryland river shrub species; Duma florulenta (Polygonaceae)

2019 ◽  
Vol 9 (13) ◽  
pp. 7613-7627 ◽  
Author(s):  
Bruce Murray ◽  
Michael Reid ◽  
Samantha Capon ◽  
Shu‐Biao Wu
Keyword(s):  
Gene Flow ◽  
Genetic Analysis ◽  
Shrub Species ◽  
Dryland River

scholarly journals Genetic analysis of a wild-caught hybrid between non-sister Heliconius butterfly species

2007 ◽  
Vol 3 (6) ◽  
pp. 660-663 ◽  
Author(s):  
Kanchon K Dasmahapatra ◽  
Armando Silva-Vásquez ◽  
Jae-Woo Chung ◽  
James Mallet
Keyword(s):  
Gene Flow ◽  
Genetic Analysis ◽  
Related Species ◽  
Species Boundaries ◽  
Butterfly Species ◽  
Distant Hybridization ◽  
Closely Related Species ◽  
Naturally Occurring ◽  
Heliconius Melpomene ◽  
Wing Coloration

Interspecific hybridization occurs regularly in wild Heliconius butterflies, although hybrid individuals are usually very rare. However, hybridization generally occurs only between the most closely related species. We report a rare naturally occurring hybrid between non-sister species and carry out the first genetic analysis of such distant hybridization. Mitochondrial and nuclear genes indicate that the specimen is an F 1 hybrid between a female Heliconius ethilla and a male Heliconius melpomene , originating from a group of 13 species estimated to have diverged over 2.5 Myr ago. The presence of such distant natural hybrids, together with evidence for backcrossing, suggests that gene flow across species boundaries can take place long after speciation. Adaptive genes such as those involved in wing coloration could thus be widely shared among members of this highly mimetic genus.

scholarly journals Evidence of unidirectional gene flow in a fragmented population of Salmo trutta L.

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Rafał Bernaś ◽  
Anna Wąs-Barcz ◽  
Mariann Árnyasi ◽  
Piotr Dębowski ◽  
Grzegorz Radtke ◽  
...  
Keyword(s):  
Gene Flow ◽  
Genetic Analysis ◽  
River Basin ◽  
Brown Trout ◽  
Salmo Trutta ◽  
River System ◽  
Trout Population ◽  
Spawning Areas ◽  
Baltic Sea Region ◽  
Fragmented Population

AbstractSelection, genetic drift, and gene flow affect genetic variation within populations and genetic differences among populations. Both drift and selection tend to decrease variation within populations and increase differences among populations, whereas gene flow increases variation within populations but leads to populations being related. In brown trout (Salmo trutta L.), the most important factor in population fragmentation is disrupted river-segment connectivity. The main goal of the study was to use genetic analysis to estimate the level of gene flow among resident and migratory brown trout in potential hybridization areas located downstream of impassable barriers in one river basin in the southern Baltic Sea region. First, spawning redds were counted in the upper river basin downstream of impassable barriers. Next, samples were collected from juveniles in spawning areas located downstream of barriers and from adults downstream and upstream of barriers. Subsequently, genetic analysis was performed using a panel of 13 microsatellite loci and the Salmo trutta 5 K SNP microarray. The genetic differentiation estimated between the resident form sampled upstream of the barriers and the anadromous specimens downstream of the barriers was high and significant. Analysis revealed that gene flow occurred between the two forms in the hybridization zone investigated and that isolated resident specimens shared spawning grounds with sea trout downstream of the barriers. The brown trout population from the river system investigated was slightly, internally diversified in the area accessible to migration. Simultaneously, the isolated part of the population was very different from that in the rest of the basin. The spawning areas of the anadromous form located downstream of the barriers were in a hybridization zone and gene flow was confirmed to be unidirectional. Although they constituted a small percentage, the genotypes typical upstream of the barriers were admixed downstream of them. The lack of genotypes noted upstream of the barriers among adult anadromous individuals might indicate that migrants of upstream origin and hybrids preferred residency.

High gene flow and metapopulation dynamics detected for three species in a dryland river system

2011 ◽  
Vol 56 (11) ◽  
pp. 2378-2390 ◽  
Author(s):  
JOEL A. HUEY ◽  
DANIEL J. SCHMIDT ◽  
STEPHEN R. BALCOMBE ◽  
JONATHAN C. MARSHALL ◽  
JANE M. HUGHES
Keyword(s):  
Gene Flow ◽  
River System ◽  
Metapopulation Dynamics ◽  
High Gene Flow ◽  
Dryland River ◽  
High Gene

scholarly journals Genetic analysis of local Vietnamese chickens provides evidence of gene flow from wild to domestic populations

BMC Genetics ◽  
2009 ◽  
Vol 10 (1) ◽  
Author(s):  
C Berthouly ◽  
G Leroy ◽  
T Nhu Van ◽  
H Hoang Thanh ◽  
B Bed'Hom ◽  
...  
Keyword(s):  
Gene Flow ◽  
Genetic Analysis

scholarly journals High-resolution genetic analysis reveals extensive gene flow within the jellyfishPelagia noctiluca(Scyphozoa) in the North Atlantic and Mediterranean Sea

2015 ◽  
Vol 117 (2) ◽  
pp. 252-263 ◽  
Author(s):  
Fergal Glynn ◽  
Jonathan D. R. Houghton ◽  
Thomas Bastian ◽  
Thomas K. Doyle ◽  
Verónica Fuentes ◽  
...  
Keyword(s):  
Gene Flow ◽  
High Resolution ◽  
Genetic Analysis ◽  
Mediterranean Sea ◽  
North Atlantic ◽  
The North ◽  
The North Atlantic

Genetic differences among Vietnamese Haplorchis taichui populations using the COI genetic marker

2012 ◽  
Vol 87 (1) ◽  
pp. 66-70 ◽  
Author(s):  
D.T. Dung ◽  
N.T. Hop ◽  
U. Thaenkham ◽  
J. Waikagul
Keyword(s):  
Genetic Variation ◽  
Gene Flow ◽  
Genetic Analysis ◽  
Intermediate Host ◽  
Genetic Marker ◽  
Trematode Species ◽  
Evolutionary Divergence ◽  
Host Fish ◽  
Different Populations ◽  
Haplorchis Taichui

AbstractAdults of the fish-borne intestinal trematode species Haplorchis taichui were collected from humans in three provinces of Vietnam: Ha Giang, Thanh Hoa and Quang Tri. Genetic analysis revealed three groups of the parasite from clustering dendrograms, correlating with the localities in which they were collected. Measurements of evolutionary divergence over sequence pairs were greater between the different populations than within them, which indicated that the three populations were genetically different. The significance (Fst= 0.73; P value < 0.05) of the genetic variation of the three studied populations implied that genetic separation of the populations had already occurred, which may have been caused by a low gene flow among the different H. taichui populations. Factors contributing to the low gene flow may include isolation resulting from the intermediate-host fish rarely being sold outside of the rural commune where they are raised and the enclosed aquacultural areas themselves.

Sign in / Sign up

Export Citation Format

Share Document