Genetic variability and population differentiation in captive baird's Tapirs (Tapirus bairdii)

Zoo Biology ◽  
2004 ◽  
Vol 23 (6) ◽  
pp. 521-531 ◽  
Author(s):  
James E. Norton ◽  
Mary V. Ashley
Keyword(s):  
Genetic Variability ◽  
Population Differentiation

scholarly journals Genome-wide genetic diversity, population structure and admixture analysis in Eritrean Indigenous Cattle

2020 ◽  
Vol 49 (6) ◽  
pp. 1083-1092
Author(s):  
S Goitom ◽  
M.G. Gicheha ◽  
F.K. Njonge ◽  
N Kiplangat
Keyword(s):  
Genetic Diversity ◽  
Population Structure ◽  
Genetic Variability ◽  
Population Differentiation ◽  
Principal Component ◽  
Vital Role ◽  
Group Method ◽  
Indigenous Cattle ◽  
Ecological Zones ◽  
Genome Wide

Indigenous cattle play a vital role in subsistence and livelihood of pastoral producers in Eritrea. In order to optimally utilize and conserve these valuable indigenous cattle genetic resources, the need to carry out an inventory of their genetic diversity was recognized. This study assessed the genetic variability, population structure and admixture of the indigenous cattle populations (ICPs) of Eritrea using a genotype by sequencing (GBS) approach. The authors genotyped 188 animals, which were sampled from 27 cattle populations in three diverse agro-ecological zones (western lowlands, highlands and eastern lowlands). The genome-wide analysis results from this study revealed genetic diversity, population structure and admixture among the ICPs. Averages of the minor allele frequency (AF), observed heterozygosity (HO), expected heterozygosity (HE), and inbreeding coefficient (FIS) were 0.157, 0.255, 0.218, and -0.089, respectively. Nei’s genetic distance (Ds) between populations ranged from 0.24 to 0.27. Mean population differentiation (FST) ranged from 0.01 to 0.30. Analysis of molecular variance revealed high genetic variation between the populations. Principal component analysis and the distance-based unweighted pair group method and arithmetic mean analyses revealed weak substructure among the populations, separating them into three genetic clusters. However, multi-locus clustering had the lowest cross-validation error when two genetically distinct groups were modelled. This information about genetic diversity and population structure of Eritrean ICPs provided a basis for establishing their conservation and genetic improvement programmes. Keywords: genetic variability, molecular characterization, population differentiation

scholarly journals GENETIC VARIABILITY AND POPULATION DIFFERENTIATION OF OPISTHORCHIS FELINEUS (TREMATODA) FROM WEST SIBERIA RIVERS

2012 ◽  
Vol 10 (3) ◽  
pp. 10-16
Author(s):  
Oksana N Zhigileva ◽  
Daria V Zenovkina ◽  
Tatyana A Zamyatina
Keyword(s):  
Population Structure ◽  
Genetic Variability ◽  
Dna Markers ◽  
Population Differentiation ◽  
Western Siberia ◽  
West Siberia ◽  
Cyprinid Fish ◽  
Intermediate Hosts ◽  
Opisthorchis Felineus ◽  
Low Level

Genetic variability in Opisthorchis felineus from 6 Western Siberia rivers was studied using allozyme and multilocus DNA markers. Genetic subdivision of populations and the spatial genetic variability in O. felineus maritas were found to be the same when using two methods of analysis, but differed from these indices in metacercariae. Metacercariae from ide, dace and roach were not genetically different, indicating the absence of hostal subpopulations of the parasite. Low level of O. felineus genetic variability is not consistent with a pronounced population structure of intermediate hosts — Cyprinid fish.

scholarly journals Analysis of inter - population variability Scots pine (Pinus sylvestris L.) using morphometric markers

Genetika ◽  
2012 ◽  
Vol 44 (3) ◽  
pp. 689-699
Author(s):  
Aleksandar Lucic ◽  
Vasilije Isajev ◽  
Ljubinko Rakonjac ◽  
Milan Mataruga ◽  
Vladan Popovic ◽  
...  
Keyword(s):  
Genetic Variability ◽  
Pinus Sylvestris ◽  
Scots Pine ◽  
Population Differentiation ◽  
Morphometric Parameters ◽  
Population Variability ◽  
Biological Similarity ◽  
Neck Diameter ◽  
Significant Population Differentiation

The aim of this study is analysis of inter-population variability of Scots pine (Pinus sylvestris L.) using morphometric parameters of cones and seedlings originating from seven populations in Serbia.The analysis of 1960 cones and their seeds was performed as well as the analysis of morphometric parameters of seedlings (height and root neck diameter) that were produced from this seed. Based on the obtained results the significant differences were noticed in the values of analyzed characters for each population separately. The biological similarity or distance regarding the analyzed characters showed a significant population differentiation. By presenting the preliminary knowledge on the genetic variability of the study populations, the reported results will contribute to better understanding of the significance of the analyzed characters in the population differentiation.

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