scholarly journals Gene flow and genetic divergence among mainland and insular populations across the south-western range of the Eurasian treecreeper (Certhia familiaris, Aves)

2019 ◽  
Vol 126 (3) ◽  
pp. 447-461 ◽  
Author(s):  
Jean-Marc Pons ◽  
Alice Cibois ◽  
Jérôme Fournier ◽  
Jérôme Fuchs ◽  
Georges Olioso ◽  
...  
Keyword(s):  
Gene Flow ◽  
Genetic Divergence ◽  
The South ◽  
Certhia Familiaris ◽  
Eurasian Treecreeper ◽  
Insular Populations

Minimal genetic divergence among South American samples of the water opossum Chironectes minimus: evidence for transcontinental gene flow?

Mammalia ◽  
2019 ◽  
Vol 83 (2) ◽  
pp. 190-192 ◽  
Author(s):  
Robert S. Voss ◽  
Sharon A. Jansa
Keyword(s):  
Gene Flow ◽  
Range Expansion ◽  
Genetic Divergence ◽  
Southeastern Brazil ◽  
Population Divergence ◽  
South American ◽  
The South ◽  
Published Evidence ◽  
Pairwise Differences

Abstract Cytochrome b sequences from South American specimens of the water opossum Chironectes minimus exhibit uncorrected pairwise differences of 0.6% or less among samples collected thousands of kilometers apart (in Guyana, Bolivia and southeastern Brazil). Despite published evidence of population divergence from recent analyses of craniodental morphology, our results suggest extensive gene flow or recent range expansion across the South American landscapes currently occupied by this seldom-collected species.

scholarly journals Genetic divergence among Nellore breed herds raised in the South Region of Brazil

2013 ◽  
Vol 43 (5) ◽  
pp. 878-883
Author(s):  
Jader Silva Lopes ◽  
Paulo Roberto Nogara Rorato ◽  
Tomás Weber ◽  
Ronyere Olegário de Araújo ◽  
Dionéia Magda Everling ◽  
...  
Keyword(s):  
Cluster Analysis ◽  
Genetic Divergence ◽  
Rio Grande ◽  
Southern Region ◽  
Rio Grande Do Sul ◽  
The South ◽  
Santa Catarina ◽  
Weaning Weight ◽  
Breeding Values ◽  
Ward Method

The objective of this study was to evaluate the genetic divergence among Nellore breed animals raised in 45 farms in the Southern Region of Brazil. The characteristic studied was weaning weight adjusted to 205 days of life (P205), from 10,874 animals sired by 425 bulls and 7,629 cows, collected between 1976 and 2001, and distributed in the states of Rio Grande do Sul (1,499), Santa Catarina (2,332) and Paraná (7,043). The animals were distributed by cluster analysis in eight genetic divergent groups, enabling this technique to be applied to organize the matings in order to obtain heterotic effect. The herd/farm groups were formed through the hierarchical Ward method, using the direct (VGD) and maternal (VGM) breeding values predicted by the REML method. The VGD of the animal accounted for 90% of the differences among herds, and the remaining 10% was attributed to differences in the VGM. On average, the P205 for the animals from inter-group mating was 1.4kg higher than those from intra-group mating, representing 2.4% of heterosis.

Prey depletion by the foraging of the Eurasian treecreeper, Certhia familiaris, on tree-trunk arthropods

Oecologia ◽  
2001 ◽  
Vol 128 (4) ◽  
pp. 488-491 ◽  
Author(s):  
Ari Jäntti ◽  
Teija Aho ◽  
Harri Hakkarainen ◽  
Markku Kuitunen ◽  
Jukka Suhonen
Keyword(s):  
Tree Trunk ◽  
Certhia Familiaris ◽  
Eurasian Treecreeper ◽  
Prey Depletion

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.

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 Effectiveness of managed gene flow in reducing genetic divergence associated with captive breeding

2015 ◽  
Vol 8 (10) ◽  
pp. 956-971 ◽  
Author(s):  
Charles D. Waters ◽  
Jeffrey J. Hard ◽  
Marine S. O. Brieuc ◽  
David E. Fast ◽  
Kenneth I. Warheit ◽  
...  
Keyword(s):  
Gene Flow ◽  
Genetic Divergence ◽  
Captive Breeding

scholarly journals Fluctuating feather asymmetry in relation to corticosterone levels is sex-dependent in Eurasian treecreeper ( Certhia familiaris ) nestlings

2010 ◽  
Vol 6 (4) ◽  
pp. 521-524 ◽  
Author(s):  
Samuli Helle ◽  
Petri Suorsa ◽  
Esa Huhta ◽  
Harri Hakkarainen
Keyword(s):  
Plasma Levels ◽  
Developmental Trajectory ◽  
Stress Hormone ◽  
Vertebrate Species ◽  
Free Living ◽  
Phenotypic Marker ◽  
Individual Level ◽  
Certhia Familiaris ◽  
Specific Association ◽  
Eurasian Treecreeper

Fluctuating asymmetry (FA) has been widely used as a stress-related phenotypic marker of developmental instability. However, previous studies relating FA to various stressful conditions have produced inconsistent results and we still lack quantitative individual-level evidence that high FA is related to stress in wild vertebrate species. We studied how baseline plasma levels of corticosterone predicted FA of wing and tail feathers in free-living Eurasian treecreeper ( Certhia familiaris ) nestlings. We found a sex-specific association between corticosterone levels and FA: high corticosterone levels were related to an increased FA in male but not in female nestlings. These results suggest that in treecreepers, FA may correlate with individual stress hormone levels, male developmental trajectory being potentially more sensitive to stress than that of the female.

Inferring population connectivity across the range of the purple-crowned fairy-wren (Malurus coronatus) from mitochondrial DNA and morphology: implications for conservation management

2012 ◽  
Vol 60 (3) ◽  
pp. 199 ◽  
Author(s):  
Anja Skroblin ◽  
Robert Lanfear ◽  
Andrew Cockburn ◽  
Sarah Legge
Keyword(s):  
Mitochondrial Dna ◽  
Gene Flow ◽  
Dna Sequences ◽  
Genetic Divergence ◽  
Conservation Management ◽  
Habitat Degradation ◽  
Morphological Difference ◽  
Population Connectivity ◽  
Isolated Populations ◽  
The Impact

Knowledge of population structure and patterns of connectivity is required to implement effective conservation measures for the purple-crowned fairy-wren (Malurus coronatus), a threatened endemic of northern Australia. This study aimed to identify barriers to dispersal across the distribution of M. coronatus, investigate the impact that the recent declines may have on population connectivity, and propose conservation actions to maintain natural patterns of gene flow. Analysis of mitochondrial DNA sequences from 87 M. coronatus identified two phylogenetic clusters that corresponded with the phenotypically defined western (M. c. coronatus) and eastern (M. c. macgillivrayi) subspecies. The genetic divergence between these subspecies was consistent with isolation by a natural barrier to gene flow, and supports their separate conservation management. Within the declining M. c. coronatus, the lack of genetic divergence and only slight morphological difference between remnant populations indicates that populations were recently linked by gene flow. It is likely that widespread habitat degradation and the recent extirpation of M. c. coronatus from the Ord River will disrupt connectivity between, and dynamics within, remnant populations. To prevent further declines, conservation of M. coronatus must preserve areas of quality habitat and restore connectivity between isolated populations.

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