Demographic genetics of American beech (<i>Fagus grandifolia</i> Ehrh.) IV. Development of genetic variability and gene flow during succession in a coastal plain forest in Maryland

Kitamura, Keiko; Takasu, Hideki; Hagiwara, Shinsuke; Homma, Kohsuke; O'Neill, Jay; Whigham, Dennis F.; Kawano, Shoichi

doi:10.1111/j.1442-1984.2008.00228.x

Cited by 8 publications

(8 citation statements)

References 53 publications

(96 reference statements)

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“…Thus, neighbourhood area reflects variation in net dispersal distances of individuals from their natal source (King & Murtaugh, 1997). Wright's neighbourhood area circle contains 86.5% of individuals dispersing from its centre per generation, and its radius is 2 σ (Wright, 1946; Boshier et al , 1995; King & Murtaugh, 1997; Kitamura et al , 2008). Therefore, the radius, which represents a measure of gene flow, can be calculated from an estimate of 4 πDσ 2 if an independent demographic estimate of D can be obtained (Rousset, 1997; Sumner et al , 2001).…”

Section: Methodsmentioning

confidence: 99%

Genetic structure and gene flow among European corn borer populations from the Great Plains to the Appalachians of North America

Kim

Coates

Bagley

et al. 2011

Agricultural and Forest Entomology

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Abstract1 Earlier population genetic spatial analysis of European corn borer Ostrinia nubilalis (Hubner) indicated no genetic differentiation even between locations separated by 720 km. This result suggests either high dispersal resulting in high gene flow or that populations are not in migration-drift equilibrium subsequent to their invasion of the central U.S.A. in the 1940s. 2 To discriminate among these two possibilities, samples were collected at 12 locations in eight states from New York to Colorado, a geographic scale that is three-fold greater than previously tested. Eight microsatellite markers were employed to estimate genetic differentiation and gene flow among these populations, and to test for isolation-by-distance. 3 Although pairwise F ST estimates were very low, there was a significant isolation-by-distance relationship. 4 Wright's neighbourhood area (i.e. the surface area covered by a panmictic group of individuals within a larger continuous distribution) was calculated as 433 km 2,and the radius indicates that approximately 13% of O. nubilalis adults disperse a net distance >12 km per generation from their natal source. 5 Analyses indicated significant differentiation between the north-eastern region (New York and Pennsylvania) and the region combining sample locations from Ohio to Colorado, suggesting the potential for isolation of populations by topographic barriers in the Northeast. 6 Taken together, the results suggest that O. nubilalis exhibits substantial gene flow over long distances and that the lack of genetic differentiation between populations across hundreds of kilometres is not simply a result of migration-drift disequilibrium arising from the recent range expansion. KeywordsDispersal, European corn borer, gene flow, genetic structure, invasive, landscape, migration, neighbourhood, Ostrinia nubilalis (Lepidoptera: Crambidae), population genetics Disciplines Entomology | Plant Breeding and Genetics CommentsThis article is from Agricultural and Forest Entomology; 13 (2011); 383-393; doi: 10.1111/ j.1461-9563.2011 RightsWorks produced by employees of the U.S. Government as part of their official duties are not copyrighted within the U.S. The content of this document is not copyrighted. Abstract 1 Earlier population genetic spatial analysis of European corn borer Ostrinia nubilalis(Hübner) indicated no genetic differentiation even between locations separated by 720 km. This result suggests either high dispersal resulting in high gene flow or that populations are not in migration-drift equilibrium subsequent to their invasion of the central U.S.A. in the 1940s. 2 To discriminate among these two possibilities, samples were collected at 12 locations in eight states from New York to Colorado, a geographic scale that is threefold greater than previously tested. Eight microsatellite markers were employed to estimate genetic differentiation and gene flow among these populations, and to test for isolation-by-distance. 3 Although pairwise F ST estimates were very low, there was a significant...

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Section: Methodsmentioning

confidence: 99%

Genetic structure and gene flow among European corn borer populations from the Great Plains to the Appalachians of North America

Kim

Coates

Bagley

et al. 2011

Agricultural and Forest Entomology

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“…They found that individual heterozygosity positively affected seedling longevity in P. jezoensis . As a matter of course, the survival or death of genetically related individuals may affect the spatial genetic structure of the later life-stages ( Kitamura et al, 2008 ). However, the previous study by Okada et al (2015) did not investigate P. jezoensis FSGS or seed dispersal patterns, which may be expected to strongly reflect a lack of consistent opportunities for regeneration on CWD.…”

Section: Introductionmentioning

confidence: 99%

Distinctions in Fine-Scale Spatial Genetic Structure Between Growth Stages of Picea jezoensis Carr.

et al. 2018

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Conifers in northern forests, such as fir and spruce, preferably regenerate on coarse woody debris, including fallen logs, stumps, and snags. In northern Japan, the sub-boreal conifer species Picea jezoensis is completely dependent on coarse woody debris for seedling establishment. To understand the fine-scale spatial genetic structure (FSGS) of this species, a 5-ha plot was established in central Hokkaido, and 531 individual trees were categorized into four life-stages (seedling, sapling, juvenile, and mature) on the basis of age and size. The FSGS of the established seedlings and later growth stages was investigated using 11 nuclear simple sequence repeat loci. A STRUCTURE analysis of seedlings and saplings established on fallen logs revealed that genetically related individuals were spatially localized between adjacent logs. We also found a significant FSGS in early life-stages based on a decline in the kinship coefficient calculated between individuals over shorter to longer spatial distances. Furthermore, the estimation of dispersal kernels indicated the frequent occurrence of short-distance seed dispersal. These results indicated that genetically related seedlings and saplings regenerated on the same or nearby fallen logs. In contrast to the results for the early stages, mature-stage trees showed no significant FSGS. We ran a simulation to examine the hypothesis that the FSGS could be eliminated by demographic thinning during life history processes. We calculated values for simulated offspring generated under three sets of conditions; i.e., by removing (i) inbred individuals, (ii) randomly chosen individuals, and (iii) all individuals on the specific fallen logs. However, the results for the FSGS were significant for all simulated data sets. This indicated that inbreeding depression, stochastic loss, or eradication of establishment sites by local disturbances alone could not explain the lack of FSGS among mature-stage trees. Therefore, it is possible that the colonization history of mature trees present on the study site might differ from that of the current offspring.

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“…Presence of populationspecific cpSSRs haplotypes was observed also by VEN- DRAMIN et al (2000) in other parts of Norway spruce distribution in Europe. This characteristic seems to be a general peculiarity of conifer species (PROVAN et al, 1998) and within species differentiation among different sample cohorts within population was observed also in Populus and Fagus (LITTLE and DALE, 1999, TAKENAKA et al, 2002, KITAMURA et al, 2008. The proportion of reported population-specific haplotypes ranged between 40 % in Abies alba and 89 % in halepensis-complex pines .…”

Section: Discussionmentioning

confidence: 86%

Genetic heterogeneity in age classes of naturally regenerated old growth forest of Picea abies (L.) Karst

et al. 2014

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The Białowiez · a Primeval Forest is located northeastern Poland. It is one of Europe's most precious old growth forests in terms of abundance and richness of vegetation, retaining features of a primeval lowland forest which cannot be found anywhere else on the European continent. The aim of the study was to assess the genetic heterogeneity of the naturally regenerated Picea abies population using five chloroplast microsatellite markers. In total, 290 trees representing five age classes were studied. Clear patterns of genetic differentiation in relation to demographic substructuring were found within the population. The class of embryos exhibited the greatest genetic richness as evident from the highest number of alleles and haplotypes, the highest mean number of private alleles and haplotypes and the highest haplotype diversity. In the subsequent age classes, a significant decrease in the level of genetic variation was observed. Our data demonstrate that long-lived, highly outcrossing tree species growing in continuous stands can be genetically heterogeneous on a small geographic scale. The heterogeneity is related to age structure and it is likely due to the underlying mating system and selection processes.

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Demographic genetics of American beech (Fagus grandifolia Ehrh.) IV. Development of genetic variability and gene flow during succession in a coastal plain forest in Maryland

Cited by 8 publications

References 53 publications

Genetic structure and gene flow among European corn borer populations from the Great Plains to the Appalachians of North America

Genetic structure and gene flow among European corn borer populations from the Great Plains to the Appalachians of North America

Distinctions in Fine-Scale Spatial Genetic Structure Between Growth Stages of Picea jezoensis Carr.

Genetic heterogeneity in age classes of naturally regenerated old growth forest of Picea abies (L.) Karst

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