Epigenetic Variability of the Highly Endangered Przewalski’s Horses in Temporal and Geographical Populations

This paper examines features of the demographic structure of natural populations of a rare representative of the steppe flora Astragalus cornutus Pall. (Fabaceae). The rarity of the species makes it necessary to include it in the Red Books of the Russian Federation and some steppe regions. In the Samara Region, species populations require additional protection in connection with the peculiarities of biology and ecology, a significant anthropogenic load on communities, and a reduction in the number of habitats. We studied the features of the structure of populations in the Samara Trans-Volga Region. A total of 84 cenopopulations were surveyed, tendencies of population change, features of demographic and spatial structure were revealed. The structure of populations is affected by the ecological and phytocenotic conditions of the environment and anthropogenic factors. The replacement and recovery of individuals in A. cornutus populations is slow. The ontogenetic structure of populations has a fluctuation dynamics. Assessment of the studied geographical populations by L.A. Zhivotovsky efficiency criterion (2001) showed that they are all mature. Specific cenopopulations of A. cornutus are aging (5%) and old (8%). The average density of individuals is about 3 individuals/m. The average effective density is 2,4 individuals/m, the largest - 4,1, the smallest - 1,3. The condition of all studied populations (even in a satisfactory state) on the territory of the Samara Region causes alarm. Populations of the species in the region need additional protection measures.

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Population genetic analysis and evidence of inter-specific introgression in Helichrysum armenium and H. rubicundum (Asteraceae)

Genetika ◽

10.2298/gensr1502451t ◽

2015 ◽

Vol 47 (2) ◽

pp. 451-468 ◽

Cited By ~ 2

Author(s):

Malahat Taban ◽

Masoud Sheidai ◽

Zahra Noormohammadi ◽

Narjes Azizi ◽

Somayeh Ghasemzadeh-Baraki ◽

...

Keyword(s):

Population Genetic ◽

Structural Changes ◽

Genetic Difference ◽

Genetic Admixture ◽

Specific Gene ◽

Population Genetic Study ◽

Population Genetic Analysis ◽

Closely Related Species ◽

Geographical Populations ◽

Genetic Stratification

Helichrysum armenium and H. rubicundum are two medicinally important plants of Iran that are distributed in various regions of the country. They are extensively used by locals as medicinal plants and a great negative selection pressure is applied on them. Therefore, due to importance of these plant species, we performed a population genetic study in both species. For this study, we used 66 randomly collected plants from 24 geographical populations of Helichrysum armenium and H. rubicundu. These species had areas of overlap and contact and we found some intermediate plants that were included in our study too. UPGMA and MDS analyses revealed morphological separation of these closely related species and placed intermediate plants in an intermediate position. ISSR analysis revealed inter-population genetic diversity and K-Means clustering and STRUCTURE analyses revealed populations. Genetic stratification in both species. Genetic difference of the studied populations was not correlated to geographical distance. Triangle plot of Bayesian analysis and NeighborNet plot showed inter-specific gene flow. The studied populations showed plants with 2n = 2x = 14 and 2n = 4x = 28 chromosomes and differed significantly in their meiotic behavior. Therefore, a combination of genetic stratification, and genetic admixture as well as polyploidy and chromosomes structural changes, have played rule in Helichrysum diversification.

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Faculty Opinions recommendation of Genome-wide analysis of differential transcriptional and epigenetic variability across human immune cell types.

Faculty Opinions – Post-Publication Peer Review of the Biomedical Literature ◽

10.3410/f.727246822.793558965 ◽

2019 ◽

Author(s):

Elizabeth Sapey

Keyword(s):

Immune Cell ◽

Cell Types ◽

Epigenetic Variability ◽

Genome Wide Analysis ◽

Genome Wide ◽

Human Immune

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Morphometric and genetic differentiation among populations of Eupemphix nattereri (Amphibia, Anura, Leiuperidae) from central Brazil

Iheringia Série Zoologia ◽

10.1590/s0073-47212008000400013 ◽

2008 ◽

Vol 98 (4) ◽

pp. 493-500 ◽

Cited By ~ 3

Author(s):

Daniela de M. e Silva ◽

Aparecido D. da Cruz ◽

Rogério P. Bastos ◽

Mariana P. de C. Telles ◽

José Alexandre F. Diniz-Filho

Keyword(s):

Rapd Markers ◽

Phenotypic Diversity ◽

Isolation By Distance ◽

Mantel Test ◽

Population Divergence ◽

Morphometric Traits ◽

Central Brazil ◽

Geographical Populations ◽

Geographical Distances ◽

The Relationship

To assess genetic structure and phenotypic diversity of Eupemphix nattereri Steindachner, 1863, morphometric and molecular analyses were carried out for nine populations from the State of Goiás. A total of 11 morphometric traits were evaluated and genetic information was estimated using RAPD markers. Genetic and phenotypic distances were determined as a function of geographical origin. Correlation among genetic, morphometric, micro, and macroenviromental were analyzed by the Mantel test. Genetic data indicated high levels of genetic diversity (Φst= 0.3) among the nine populations. Mantel tests did not reveal a significant positive correlation between genetic and geographical distances, indicating that locally geographical populations were not genetically similar, even in distances smaller than 50 km. Discriminant analysis on 11 morphometric measurements showed a high divergence among the nine populations. However, a marginally significant correlation (P=0.08) between genetic and morphometric distances was found. The observed correlation was not causal in terms of the relationship between phenotype and genotype, but indicated common spatial structures. Thus, our results suggest that isolation-by-distance processes may explain population divergence in Eupemphix nattereri.

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