Population genetics

About: Population genetics is a research topic. Over the lifetime, 11766 publications have been published within this topic receiving 650461 citations. The topic is also known as: Genetics, Population.

Characterization and management of genetic diversity in Phytophthora sojae populations

Abstract: 39

Microsatellite markers for Dayaoshania cotinifolia (Gesneriaceae), a critically endangered perennial herb

Abstract: UNLABELLED: • PREMISE OF THE STUDY: Microsatellite primers were developed for the critically endangered species Dayaoshania cotinifolia (Gesneriaceae) to evaluate population genetic diversity and detect population history. • METHODS AND RESULTS: In our study, 15 primer sets were developed using an enriched genomic library. These are the first microsatellite loci developed for this genus. Genetic diversity was measured using 40 individuals. The number of alleles per locus ranged from one to six, and the incidence of observed heterozygosities was 0.365 and 0.410 in two populations. • CONCLUSIONS: The described markers will be useful in future population genetics studies of this critically endangered species.

Population Genetic Study of 15 STR Loci in a Chinese Population

Abstract: POPULATION: Chinese (n = 501).

Characterization of Duck (Anas platyrhynchos) Short Tandem Repeat Variation by Population-Scale Genome Resequencing.

Abstract: Short tandem repeats (STRs) are usually associated with genetic diseases and gene regulatory functions, and are also important genetic markers for analysis of evolutionary, genetic diversity and forensic. However, for the majority of STRs in the duck genome, their population genetic properties and functional impacts remain poorly defined. Recent advent of next generation sequencing (NGS) has offered an opportunity for profiling large numbers of polymorphic STRs. Here, we reported a population-scale analysis of STR variation using genome resequencing in mallard and Pekin duck. Our analysis provided the first genome-wide duck STR reference including 198,022 STR loci with motif size of 2-6 base pairs. We observed a relatively uneven distribution of STRs in different genomic regions, which indicates that the occurrence of STRs in duck genome is not random, but undergoes a directional selection pressure. Using genome resequencing data of 23 mallard and 26 Pekin ducks, we successfully identified 89,891 polymorphic STR loci. Intensive analysis of this dataset suggested that shorter repeat motif, longer reference tract length, higher purity, and residing outside of a coding region are all associated with an increase in STR variability. STR genotypes were utilized for population genetic analysis, and the results showed that population structure and divergence patterns among population groups can be efficiently captured. In addition, comparison between Pekin duck and mallard identified 3,122 STRs with extremely divergent allele frequency, which overlapped with a set of genes related to nervous system, energy metabolism and behavior. The evolutionary analysis revealed that the genes containing divergent STRs may play important roles in phenotypic changes during duck domestication. The variation analysis of STRs in population scale provides valuable resource for future study of genetic diversity and genome evolution in duck.

Biosystematic study and population genetic analysis in Lamium amplexicaule L. (Lamioideae, Lamiaceae)

Abstract: L. amplexicaule L. grows in different regions of Iran and forms several populations that can be invasive in some area. Morphological and genetic variation of L. amplexicaule in Iran was studied to evaluate the differentiation among three presumed varieties within this species. Morphometric study was accompanied by the analysis of ISSR and chloroplast genome (psbA-trnH). Results of the molecular methods show that L. amplexicaule var. bornmuelleri Mennema. does not form any genetically distinct group. Genetic study of 103 plant specimens of 13 different populations using ISSR molecular marker revealed a high degree of within-population (67%) and among (33%) populations genetic diversity. AMOVA and Gst analyses produced a significant difference. Nm estimation revealed certain degree of gene flow/shared alleles between these populations, indicating that L. amplexicaule is predominantly an out-crossing species in Iran. Mantel test produced significant correlation between genetic distance and geographical distance of the studied populations (r = 0.097, P = 0.04). STRUCTURE plot identified two main gene pools for this species in Iran.