Genetic Variability and Structure of The Wild Service Tree (Sorbus torminalis (L.) Crantz) in Poland

Bednorz, Leszek; Myczko, Łukasz; Kosiński, Piotr

doi:10.1515/sg-2006-0027

Cited by 20 publications

(20 citation statements)

References 25 publications

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“…Kučerová et al (2010) found higher differentiation over central-European populations than those located in southern locations. Genetic differentiation among populations investigated in this study was found to be low, as compared to other studies (Demesure et al 2000, Bednorz et al 2006, Angelone et al 2007, Kučerová et al 2010, which might be attributed to close proximity of the populations under study. The FST and RST estimates were quite similar (FST = 0.048 ± 0.006 and RST = 0.059 ± 0.010), indicating that the differentiation was not caused by mutation, but rather it was due to specific colonization and gene flow patterns among populations (Balloux & Lugon-Moulin 2002).…”

Section: Iforest -Biogeosciences and Forestrycontrasting

confidence: 81%

“…Inbreeding coefficients of S. torminalis are usually found to be slightly negative, indicating excess of heterozygotes as compared to expectations from Hardy-Weinberg equilibrium (Bednorz et al 2006). Our results confirmed this finding with inbreeding coefficients being consistently slightly negative across almost all SSR loci.…”

Section: Iforest -Biogeosciences and Forestrymentioning

confidence: 95%

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Clonal structure and high genetic diversity at peripheral populations of Sorbus torminalis (L.) Crantz.

Jankowska-Wróblewska¹,

Meyza²,

Sztupecka³

et al. 2016

iForest

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Knowing the level of genetic diversity and structure in marginal plant populations is essential for managing their genetic resources. This is particularly important for rare scattered tree species, such as Sorbus torminalis (L.) Crantz. We investigated the genetic diversity and its spatial distribution in peripheral populations of S. torminalis. As the species is known to reproduce vegetatively, we also evaluated clonal structure within populations. Using 13 nuclear microsatellite loci designed in two multiplexes, we genotyped 172 individuals revealing the existence of 100 distinct genotypes. Number of ramets per genotype was variable across populations with an average of 1.72. Examples of somaclonal variation at particular loci were detected. Measures of genetic diversity of the total sample were relatively high (mean allelic richness AR = 10.293; expected heterozygosity He = 0.756), as compared to other S. torminalis populations. We noticed a slightly negative inbreeding coefficient (FIS = -0.029) indicating a small excess of heterozygotes, which is typical for self-incompatible plants. Genetic differentiation among populations was low (FST = 0.048), but Bayesian clustering methods revealed the existence of three distinct genetic clusters only in part related to population structure. Significant spatial genetic structure within populations was also detected (Sp = 0.0125) indicating fine-scale pattern of isolation by distance. Our study demonstrated that peripheral populations of S. torminalis may exhibit relatively high levels of genetic diversity despite the existence of vegetative propagation. Nevertheless, if the studied or similar populations are expected to be utilized as seed sources for ex-situ or in-situ conservation purposes, the existence of clonal structure and spatial genetic structure must be taken into account in order to avoid excessive sampling of the same or closely related genets.

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Section: Iforest -Biogeosciences and Forestrycontrasting

confidence: 81%

Section: Iforest -Biogeosciences and Forestrymentioning

confidence: 95%

Clonal structure and high genetic diversity at peripheral populations of Sorbus torminalis (L.) Crantz.

Jankowska-Wróblewska¹,

Meyza²,

Sztupecka³

et al. 2016

iForest

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“…This value is similar to differentiation levels observed in studies based on allozymes (Bednorz et al 2006;Demesure et al 2000;Rasmussen & Kollmann 2007). Our observation is slightly higher, reflecting probably a larger area covered by sampling, as we investigated populations from south-eastern Europe and partly central Europe.…”

Section: Resultssupporting

confidence: 90%

“…Geographically proximate populations tend to be genetically more similar than expected under random distribution. This is partly contrasting with previous observations, since a strong isolation by distance was reported at the intrapopulation scale ), but at the regional scale, the observations differ: OddouMuratorio et al (2001) or Angelone et al (2007) identified only a weak IBD pattern, whereas Bednorz et al (2006) or Belletti et al (2008) found clear interregional differences. The observed patterns of geographical structure visible from model-based analysis may reflect glacial history and postglacial migration.…”

Section: Resultscontrasting

confidence: 66%

“…Geographical distribution of the levels of genetic diversity and differentiation patterns of S. torminalis have been extensively studied using various types of gene markers (allozymes, RAPD, SSR, cpPCR-RFLP) on the local or regional level (Bednorz et al 2006;Belletti et al 2008;Demesure et al 2000;Rasmussen & Kollmann 2007). However, no rangewide study has been conducted.…”

Section: Introductionmentioning

confidence: 99%

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Genetic differentiation of Sorbus torminalis in Eastern Europe as determined by microsatellite markers

et al. 2010

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The genetic variation in fourteen Sorbus torminalis (L.) Crantz. populations distributed over the eastern and south-eastern part of its range was studied using seven nuclear microsatellite loci. The differentiation level was relatively high (FST = 0.228), as expected for a species with a fragmented range. The distance-based approach to the analysis of differentiation patterns (neighbour-joining tree based on pairwise coefficients of differentiation) did not reveal a clear geographical structure. On the other hand, model-based Bayesian methods (BAPS and STRUCTURE) gave geographically continuous clusters of populations. The occurrence of populations deviating strongly from the general pattern is attributed to founder effect. In spite of a generally high differentiation, a significant isolation-by-distance pattern was found, which might be a consequence of postglacial migration and gene flow among descendants of different refugia.

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Habitat fragmentation influences genetic diversity and differentiation: Fine‐scale population structure ofCercis canadensis(eastern redbud)

Ony

Nowicki

Boggess

et al. 2020

Ecology and Evolution

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Forest fragmentation may negatively affect plants through reduced genetic diversity and increased population structure due to habitat isolation, decreased population size, and disturbance of pollen-seed dispersal mechanisms. However, in the case of tree species, effective pollen-seed dispersal, mating system, and ecological dynamics may help the species overcome the negative effect of forest fragmentation. A fine-scale population genetics study can shed light on the postfragmentation genetic diversity and structure of a species. Here, we present the genetic diversity and population structure of Cercis canadensis L. (eastern redbud) wild populations on a fine scale within fragmented areas centered around the borders of Georgia-Tennessee, USA. We hypothesized high genetic diversity among the collections of C. canadensis distributed across smaller geographical ranges. Fifteen microsatellite loci were used to genotype 172 individuals from 18 unmanaged and naturally occurring collection sites. Our results indicated presence of population structure, overall high genetic diversity (H E = 0.63, H O = 0.34), and moderate genetic differentiation (F ST = 0.14)among the collection sites. Two major genetic clusters within the smaller geographical distribution were revealed by STRUCTURE. Our data suggest that native C. canadensis populations in the fragmented area around the Georgia-Tennessee border were able to maintain high levels of genetic diversity, despite the presence of considerable spatial genetic structure. As habitat isolation may negatively affect gene flow of outcrossing species across time, consequences of habitat fragmentation should be regularly monitored for this and other forest species. This study also has important implications for habitat management efforts and future breeding programs. K E Y W O R D S Cercis canadensis, fine-scale population structure, genetic diversity, habitat fragmentation, redbud S U PP O RTI N G I N FO R M ATI O N Additional supporting information may be found online in the Supporting Information section. How to cite this article: Ony MA, Nowicki M, Boggess SL, et al. Habitat fragmentation influences genetic diversity and differentiation: Fine-scale population structure of Cercis canadensis (eastern redbud).

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Genetic Variability and Structure of The Wild Service Tree (Sorbus torminalis (L.) Crantz) in Poland

Cited by 20 publications

References 25 publications

Clonal structure and high genetic diversity at peripheral populations of Sorbus torminalis (L.) Crantz.

Clonal structure and high genetic diversity at peripheral populations of Sorbus torminalis (L.) Crantz.

Genetic differentiation of Sorbus torminalis in Eastern Europe as determined by microsatellite markers

Habitat fragmentation influences genetic diversity and differentiation: Fine‐scale population structure ofCercis canadensis(eastern redbud)

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