Population genetic structure and dispersal of Pinus occidentalis in the Dominican Republic by chloroplastic SSR with implications for its conservation, management, and reforestation

2021 ◽  
Author(s):  
Luis E. Rodríguez de Francisco ◽  
Rosanna Carreras-De León ◽  
Rafael M. Navarro Cerrillo ◽  
Liz A. Paulino-Gervacio ◽  
María-Dolores Rey ◽  
...  
Keyword(s):  
Genetic Structure ◽  
Dominican Republic ◽  
Population Genetic Structure ◽  
Population Genetic ◽  
Conservation Management ◽  
Natural Populations ◽  
Limited Information ◽  
High Genetic Diversity ◽  
The Impact ◽  
Pinus Occidentalis

<i>Pinus occidentalis</i> is the dominant species of forest ecosystems in the Dominican Republic, located between 200 and 3000 meters above sea level, with extensive and overexploited natural populations. However, over the years, various restoration plans have been performed, which could affect the genetic structure of <i>P. occidentalis</i>. Despite being the species with the highest occurrence in the Dominican forests, there is no existing information on genetic structure and molecular characterization among natural populations with limited information on both phenological and productive characterization. In this study, the genetic structure, diversity, and gene flow of the five <i>P. occidentalis</i> natural populations of the Dominican Republic were determined using microsatellite markers. A total of 145 individuals were genotyped with eight polymorphic chloroplastic microsatellites, producing an average of 41 haplotypes with high genetic diversity across populations (H<sub>E</sub> = 0.90). Significant population genetic structure was found between populations (F<sub>ST</sub> = 0.123). These results reflect the impact of reforestation programs on natural populations and diluting the natural genetic signature. Analysis of population genetic data is, therefore, crucial for the breeding and conservation programs of <i>P. occidentalis</i> in the country.

Genetic diversity, Population Genetic Structure and Conservation Management of Spanish Verata Goat Breed

2020 ◽  
Vol 187 ◽  
pp. 106106
Author(s):  
M. Martínez-Trancón ◽  
J.C. Parejo ◽  
A. Rabasco ◽  
P. Padilla ◽  
J.A. Padilla
Keyword(s):  
Genetic Diversity ◽  
Genetic Structure ◽  
Population Genetic Structure ◽  
Population Genetic ◽  
Conservation Management ◽  
Goat Breed

scholarly journals Population genetic structure of the great star coral, Montastraea cavernosa, across the Cuban archipelago with comparisons between microsatellite and SNP markers

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Alexis B. Sturm ◽  
Ryan J. Eckert ◽  
Juliett González Méndez ◽  
Patricia González-Díaz ◽  
Joshua D. Voss
Keyword(s):  
Genetic Structure ◽  
Population Genetic Structure ◽  
Population Genetic ◽  
Snp Markers ◽  
Genetic Connectivity ◽  
Limited Information ◽  
Western Atlantic ◽  
Trade Offs ◽  
Significant Genetic Structure ◽  
Montastraea Cavernosa

Abstract Coral reef habitats surrounding Cuba include relatively healthy, well-developed shallow and mesophotic (30–150 m) scleractinian communities at the cross-currents of the Tropical Western Atlantic (TWA). However, Cuba’s coral communities are not immune to the declines observed throughout the TWA, and there is limited information available regarding genetic connectivity, diversity, and structure among these populations. This represents an immense gap in our understanding of coral ecology and population dynamics at both local and regional scales. To address this gap, we evaluated the population genetic structure of the coral Montastraea cavernosa across eight reef sites surrounding Cuba. Colonies were genotyped using nine microsatellite markers and > 9,000 single nucleotide polymorphism (SNP) markers generated using the 2bRAD approach to assess fine-scale genetic structure across these sites. Both the microsatellite and SNP analyses identified patterns of genetic differentiation among sample populations. While the microsatellite analyses did not identify significant genetic structure across the seven shallow M. cavernosa sampling sites, the SNP analyses revealed significant pairwise population differentiation, suggesting that differentiation is greater between eastern and western sites. This study provides insight into methodological differences between microsatellite and SNP markers including potential trade-offs between marker-specific biases, sample size, sequencing costs, and the ability to resolve subtle patterns of population genetic structure. Furthermore, this study suggests that locations in western Cuba may play important roles in this species’ regional metapopulation dynamics and therefore may merit incorporation into developing international management efforts in addition to the local management the sites receive.

Multilocus genotypic data reveal high genetic diversity and low population genetic structure of Iranian indigenous sheep

2016 ◽  
Vol 47 (4) ◽  
pp. 463-470 ◽  
Author(s):  
S. M. F. Vahidi ◽  
M. O. Faruque ◽  
M. Falahati Anbaran ◽  
F. Afraz ◽  
S. M. Mousavi ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
Genetic Structure ◽  
Population Genetic Structure ◽  
Population Genetic ◽  
High Genetic Diversity ◽  
Indigenous Sheep

scholarly journals Genetic Variation and Population Differentiation in the Bovine Lymphocyte Antigen DRB3.2 Locus of South African Nguni Crossbred Cattle

Animals ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 1651
Author(s):  
Lwamkelekile Sitshilelo Mkize ◽  
Oliver Tendayi Zishiri
Keyword(s):  
Genetic Diversity ◽  
Genetic Structure ◽  
South African ◽  
Population Genetic Structure ◽  
Population Genetic ◽  
Heterozygote Advantage ◽  
Crossbred Cattle ◽  
High Genetic Diversity ◽  
Lymphocyte Antigen ◽  
Bovine Lymphocyte

The bovine lymphocyte antigen (BoLA-DRB3) gene is an important region that codes for glycoproteins responsible for the initiation of an immune response. BoLA-DRB3 alleles have been demonstrated to be associated with disease resistance/tolerance. Therefore, great genetic diversity is correlated with better adaptation, fitness, and robustness. The current study was conducted to assess the population genetic structure of the BoLA-DRB3 gene in Nguni crossbred cattle using polymerase chain reaction-sequence based typing (PCR-SBT). High genetic diversity was detected, with 30 alleles, 11 of which are novel to the study. Alleles DRB3*0201, DRB3*0701, DRB*0901, and DRB*1601 were present in all populations and accounted for nearly around 50% of all observed alleles. A mean genetic diversity (HE) of 0.93 was detected. The high overall genetic diversity is possibly associated with pathogen-assisted selection and heterozygote advantage. Such high diversity might explain the hardiness of the Nguni crossbred cattle to the Southern African region. Low population genetic structure was identified (FST = 0.01), suggesting possible gene flow between populations and retention of similar alleles. The study was undertaken to bridge the dearth of such studies in South African breeds and it is imperative for effective sustainability of indigenous breeds and the implementation of effective breeding strategies.

Analyses multivariées de descendances de rétrocroisements et mise en évidence de distorsions de ségrégation de caractères quantitatifs chez le mil (Pennisetum typhoides (Burm.) Stapf et Hubb.)

Genome ◽  
1988 ◽  
Vol 30 (3) ◽  
pp. 411-422 ◽  
Author(s):  
A. Sarr ◽  
J. Pernès
Keyword(s):  
Multivariate Analysis ◽  
Genetic Structure ◽  
Pearl Millet ◽  
Population Genetic Structure ◽  
Population Genetic ◽  
Pollen Competition ◽  
Statistical Methodology ◽  
Pennisetum Typhoides ◽  
Differential Transmission ◽  
The Impact

Evidence for self-pollination predominance and pollen competition was derived from certain genotypes of pearl millet (Pennisetum typhoides). In the present study, the impact of such phenomena was analyzed, using F2 and backcross lineages resulting from crosses between two millet lines, namely Ligui and Massue. Four backcross families were involved: BC1a (Ligui ♂ × F1), BC1b (F1 ♂ × Ligui), BC2a (Massue ♂ × F1), BC2b (F1 ♂ × Massue). Concatenating the multivariate analysis methods allowed the division of each family into subgroups of affinities. This procedure resulted in disclosing a distortion of the global segregation in favor of the Ligui parent. To explain such distortions, a model including gametic and gametophytic selections is proposed. Besides the utilized statistical methodology, which might prove very effective in sorting out backcross lineages early in selection programs, implications of character differential transmission at the level of population genetic structure are discussed.Key words: Pennisetum typhoides, intergametophytic competitions, segregation distortion.

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