Genetic diversity of common reed in the southern Baltic Sea region – Is there an influence of disturbance?

Phylogenetic relationship and soil salinity shape intraspecific trait variability of Phragmites australis in the Yellow River Delta

“…In this study, the PCoA and F ST results suggested little differentiation and frequent gene flow between populations (Figure 5, Table 3), suggesting that there are few gene exchange barriers among populations in the Yellow River Delta and all populations might constitute a single metapopulation, which is similar to that found in the southern Baltic Sea (Kuprina et al, 2022). The mixed populations with two lineages also supported that limited diffusion might unlikely lead to the spatial genetic structure of P. australis population in the Yellow River Delta.…”

“…The intermediate disturbance might increase the genetic diversity by providing chances for external seed establishment, but extreme disturbance, stressful conditions or their combination could prevent the establishment of some sensitive genotypes (e.g., lineage P in wu03). Combined with previous studies, we could conclude that P. australis could always keep a high genetic diversity level under habitat fragmentation (Liu et al, 2021a), annual winter mowing (Kuprina et al, 2022), human management (Paul et al, 2011), and hydrographic modification (Naugzěmys et al, 2021), but the synergistic impacts of natural stressors and human disturbances might impair the genetic diversity of P. australis populations. Although our results did not find a significant relationship between genetic diversity and soil salinity due to the limited population size, previous studies found high salinity could Pagel's l was estimated by phylogenetic generalized least square (PGLS) models.…”

Genetic diversity after a quarter of a century: How genotype composition of an experimental site of common reed (Phragmites australis) changed over 24 years

“…However, the result of PCoA did not show genetic clustering of genotypes collected from plots established with the same ecotype (but did not exclude a possible epigenetic similarity). It also did not indicate the clustering of monoclonally planted genotypes according to their geographical origin, proving again the presence of a large interbreeding metapopulation of common reed in NE Germany (Lambertini et al 2008;Kuprina et al 2022). Therefore, we can conclude that the source of a higher genetic diversity detected for the polyclonally planted plots most likely was the originally higher number of genotypes, but not different environmental conditions or similar origin of ecotypes.…”

“…For these genotypes, the trnT(UGU) -trnL(UAA) chloroplast region was sequenced and haplotypes were assigned as in Saltonstall (2016). All the mentioned above procedures were conducted according to Kuprina et al (2022).…”

“…The dry biomass of one stem was calculated by dividing the dry aboveground biomass by the number of stems. To assign the plots to genotypes, one leaf from each of the ve randomly chosen stems (n = 180) was preserved in silica gel and genotyped (according to Kuprina et al (2022), with only primer set 2); the results of this genotyping were not used in the other analyses. Only plots with all ve samples belonging to the same genotype were included in the analysis.…”