The impact of successive mass selection on population genetic structure in the Pacific oyster (Crassostrea gigas) revealed by microsatellite markers

2017 ◽  
Vol 26 (1) ◽  
pp. 113-125 ◽  
Author(s):  
Jingxiao Zhang ◽  
Qi Li ◽  
Qingzhi Wang ◽  
Rihao Cong ◽  
Jianlong Ge ◽  
...  
Keyword(s):  
Genetic Structure ◽  
Microsatellite Markers ◽  
Population Genetic Structure ◽  
Crassostrea Gigas ◽  
Population Genetic ◽  
Pacific Oyster ◽  
Mass Selection ◽  
The Pacific ◽  
The Impact

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.

scholarly journals Analysis of population genetic structure of Indian Anopheles culicifacies species A using microsatellite markers

2013 ◽  
Vol 6 (1) ◽  
pp. 166 ◽  
Author(s):  
Sujatha Sunil ◽  
Om P Singh ◽  
Nutan Nanda ◽  
Kamaraju Raghavendra ◽  
BP Niranjan Reddy ◽  
...  
Keyword(s):  
Genetic Structure ◽  
Microsatellite Markers ◽  
Population Genetic Structure ◽  
Population Genetic ◽  
Anopheles Culicifacies

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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