Population genetic studies of genus Dicentrarchus reveal loss of genetic diversity in Egyptian waters

2019 ◽  
Vol 31 ◽  
pp. 100783 ◽  
Author(s):  
Fawzia S. Ali ◽  
Ahmed Mamoon
Keyword(s):  
Genetic Diversity ◽  
Population Genetic ◽  
Genetic Studies ◽  
Loss Of Genetic Diversity

scholarly journals Rejection of a serial founder effects model of genetic and linguistic coevolution

2012 ◽  
Vol 279 (1736) ◽  
pp. 2281-2288 ◽  
Author(s):  
Keith Hunley ◽  
Claire Bowern ◽  
Meghan Healy
Keyword(s):  
Genetic Diversity ◽  
Negative Correlation ◽  
Microsatellite Loci ◽  
Population Genetic ◽  
Evolutionary Process ◽  
Founder Effects ◽  
Genetic Studies ◽  
Neutral Genetic Diversity ◽  
Genetic Pattern ◽  
Autosomal Microsatellite Loci

Recent genetic studies attribute the negative correlation between population genetic diversity and distance from Africa to a serial founder effects (SFE) evolutionary process. A recent linguistic study concluded that a similar decay in phoneme inventories in human languages was also the product of the SFE process. However, the SFE process makes additional predictions for patterns of neutral genetic diversity, both within and between groups, that have not yet been tested on phonemic data. In this study, we describe these predictions and test them on linguistic and genetic samples. The linguistic sample consists of 725 widespread languages, which together contain 908 distinct phonemes. The genetic sample consists of 614 autosomal microsatellite loci in 100 widespread populations. All aspects of the genetic pattern are consistent with the predictions of SFE. In contrast, most of the predictions of SFE are violated for the phonemic data. We show that phoneme inventories provide information about recent contacts between languages. However, because phonemes change rapidly, they cannot provide information about more ancient evolutionary processes.

scholarly journals Impact of different numbers of microsatellite markers on population genetic results using SLAF-seq data for Rhododendron species

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Huaying Wang ◽  
Baiming Yang ◽  
Huan Wang ◽  
Hongxing Xiao
Keyword(s):  
Genetic Diversity ◽  
Microsatellite Markers ◽  
Population Genetic ◽  
Nuclear Markers ◽  
Genetic Studies ◽  
Population Genetic Diversity ◽  
Polymorphic Microsatellites ◽  
Ssr Primers ◽  
The Impact ◽  
Simple Sequence

AbstractMicrosatellites (simple sequence repeats, SSRs) are co-dominant nuclear markers that are widely used in population genetic studies. Population genetic parameters from different studies might be significantly influenced by differences in marker number. In our study, 265 sequences with polymorphic microsatellites were obtained from SLAF-seq data. Then, subpopulations containing different numbers (5, 6, 7,…, 15, 20, 25, 30, 35, 40) of markers were genotyped 10 times to investigate the impact of marker numbers on population genetic diversity results. Our results show that genotyping with less than 11 or 12 microsatellite markers lead to significant deviations in the population genetic diversity or genetic structure results. In order to provide markers for population genetic and conservation studies for Rhododendron, 26 SSR primers were designed and validated in three species.

Unangan (Aleut) Migrations

2021 ◽  
pp. 20-31
Author(s):  
Michael H. Crawford ◽  
Sarah Alden ◽  
Randy E. David ◽  
Kristine Beaty
Keyword(s):  
Genetic Diversity ◽  
Mitochondrial Dna ◽  
Population Genetic ◽  
Volcanic Eruptions ◽  
Intimate Relationship ◽  
Climatic Changes ◽  
Population Genetic Differentiation ◽  
Genetic Barriers ◽  
Loss Of Genetic Diversity ◽  
Evolutionary Consequences

There were diverse causes and demographic and evolutionary consequences of migration of the Unangan (a.k.a. Aleut) people in their expansion from Siberia through the Aleutian archipelago. The causes included subsistence patterns, volcanic eruptions that destroyed island econiches, climatic changes that calmed the seas and made interisland migrations possible, and cultural contacts as well as forcible relocations. The consequences of the migrations included an intimate relationship between genetics, as revealed by mitochondrial DNA, and geography; loss of genetic diversity due to population fission along kin groups; creation of genetic barriers due to periodic climatic limitations to migrations; population genetic differentiation due to kin migration and founder effect; and admixture with Russian administrators and military in the western and central islands and with fishermen of English and Scandinavian ancestry in the eastern islands.

scholarly journals A Meta-Analytical Investigation of the Gap between Measured and Predicted Inter-Population Genetic Diversity in Species of High Conservation Concern—The Case of the Critically Endangered European Mink Mustela lutreola L., 1761

Genes ◽  
2021 ◽  
Vol 12 (10) ◽  
pp. 1555
Author(s):  
Jakub Skorupski ◽  
Johan Michaux ◽  
Przemysław Śmietana
Keyword(s):  
Genetic Diversity ◽  
Population Genetic ◽  
Meta Analysis ◽  
Critically Endangered ◽  
Northeastern Russia ◽  
Mustela Lutreola ◽  
Genetic Studies ◽  
European Mink ◽  
Population Genetic Diversity ◽  
Conservation Measures

Although properly designed sampling in population genetic studies is of key importance for planning evidence-informed conservation measures, sampling strategies are rarely discussed. This is the case for the European mink Mustela lutreola, a critically endangered species. In order to address this problem, a meta-analysis aiming to examine the completeness of mtDNA haplotype sampling in recent studies of M. lutreola inter-population genetic diversity was conducted. The analysis was performed using the sample-size-based rarefaction and extrapolation sampling curve method for three populations—the Northeastern (Russia, Belarus and Estonia), the Western (France and Spain), and the Southeastern (Romania). The extrapolated values of the Shannon–Wiener index were determined, assuming full sample coverage. The gap between the measured and predicted inter-population genetic diversity was estimated, indicating that the identified level of sample coverage was the lowest for the NE population (87%), followed by the SE population (96%) and the W population (99%). A guide for sampling design and accounting for sampling uncertainty in future population genetic studies on European mink is provided. The relatively low sample coverage for the Russian population clearly indicates an urgent need to take conservation measures for European mink in this country.

scholarly journals Gradual loss of genetic diversity of Ambrosia artemisiifolia L. populations in the invaded range of central Serbia

Genetika ◽  
2014 ◽  
Vol 46 (1) ◽  
pp. 255-268 ◽  
Author(s):  
Natasa Kocis-Tubic ◽  
Mihajla Djan ◽  
Nevena Velickovic ◽  
Goran Anackov ◽  
Dragana Obreht
Keyword(s):  
Genetic Diversity ◽  
Allelic Richness ◽  
Ambrosia Artemisiifolia ◽  
Genetic Studies ◽  
Common Ragweed ◽  
Invasion Dynamics ◽  
Economic Problems ◽  
Gradual Loss ◽  
The Mean ◽  
Loss Of Genetic Diversity

As an invasive allergenic weed, Ambrosia artemisiifolia L. causes serious public health and economic problems in invaded ranges of Europe. Over the last two decades, while expanding toward southern parts of Serbia, this common ragweed has become a very troublesome plant species in the whole country. Considering the importance of genetic studies in understanding of invasive species, our main objectives in this study were to analyze the genetic diversity and genetic structure of Ambrosia artemisiifolia populations from Central Serbia, a relatively recently invaded region. Comparing values of genetic measures obtained by microsatellite analyses, a number of differences were detected in genetic diversity between sampled populations. Allelic richness-r (ranged from 5.42 to 7.80), the mean number of alleles per locus-NA (5.8-8.4) and the mean number of rare alleles per locus-NR (2.8-5.8) have quite similar ranges across populations. We observed greater genetic variability in populations from the northern part of investigated area than in southern populations. Based on pairwise Fst values, AMOVA results and PCo Analysis, moderate differentiation among population was detected, while the STRUCTURE analysis clearly separated SR-Kru and SR-Les. Data obtained for analyses of differentiation and gradual losses of genetic diversity of sampled populations provides useful information about invasion dynamics of common ragweed in recently invaded region.

KERAGAMAN GENETIK INDUK UDANG WINDU DI PERAIRAN SELATAN PANGANDARAN DAN BINUANGEUN, JAWABARAT

2018 ◽  
Vol 5 (3) ◽  
Author(s):  
Ratu Siti Aliah
Keyword(s):  
Genetic Diversity ◽  
Population Genetic ◽  
Gene Locus ◽  
Penaeus Monodon ◽  
12S Rrna ◽  
Brood Stock ◽  
Population Genetic Diversity ◽  
Result Show ◽  
Mtdna Diversity

An evaluation of the Black Tiger Brood Stock (Penaeus monodon) genetic diversity of Pangandaran and Binuangeun was conducted by using the mtDNA diversity of two gene locus of CO I and 12S rRNA to understand their population genetic diversity. The result show that the brood stock of Pangandaran has 17 haplotipe, while from Binuangeun has 13 haplotipe. The result indicated that the genetic diversity of the Balck Tiger brood stock of Pangandaran was higher than thatBinuangeun.Key words : Genetic diversity, Black Tiger brood stock, Pangandaran, Binuangeun

Microsatellite analysis of population genetic diversity in Triplophysa xiangxiensis

2013 ◽  
Vol 37 (1) ◽  
pp. 26 ◽  
Author(s):  
Yanhong YAO ◽  
Lingfu KONG ◽  
Dengqiang WANG ◽  
Wenhui HE ◽  
Li HE ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
Population Genetic ◽  
Microsatellite Analysis ◽  
Population Genetic Diversity
Sign in / Sign up

Export Citation Format

Share Document