Macrogeographic and fine-scale genetic structure in a North American oak species, Quercus rubra L

Sork, VL; Huang, Shong; Wiener, Eric

doi:10.1051/forest:19930726

Cited by 41 publications

(36 citation statements)

References 27 publications

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“…The availability of highly variable molecular markers has facilitated the analysis of fine-scale genetic structure in natural tree populations. The fine-scale structure has been found in some forest tree species (Sork et al, 1993;Berg and Hamrick, 1995;Streiff et al, 1998;Dutech et al, 2002;Hardy et al, 2006). These tree species are characterized by either limited seed dispersal or restricted pollen and seed dispersal.…”

Section: Introductionmentioning

confidence: 99%

Joint analysis of spatial genetic structure and inbreeding in a managed population of Scots pine

et al. 2009

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We have investigated the fine-scale spatial genetic structure in a managed Scots pine forest. For this purpose, we perform a Bayesian genetic-cluster analysis of 96 geographically mapped individual seed trees of Swedish Scots pine based on 14 microsatellite loci. The analysis was carried out with the recently developed program GENECLUST (François et al., 2006), which provides the facility to jointly incorporate both spatial information from a geographical neighborhood structure through a Potts-Dirichlet model and account for variable degrees of inbreeding within the clusters. To evaluate whether inbreeding and spatial interaction should be included in the best-fitting statistical model for our data, we used the deviance information criterion (DIC), a weighted measure of model fit that accounts for an effective number of free parameters in a model. Analysis shows that a model with a single estimated cluster, with high levels of inbreeding (0.25) and with a moderate amount of spatial dependency within the unique cluster (C ¼ 0.2-0.4), best explains the data. We also carried out Bayesian parentage analysis, which enabled us to exclude the possibility that the sample constitutes one single full-sib family.

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Section: Introductionmentioning

confidence: 99%

Joint analysis of spatial genetic structure and inbreeding in a managed population of Scots pine

et al. 2009

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“…Until now, studies on spatial distribution of diversity have focused mainly on the pattern of variation over widespread geographical zones (Wheeler & Guries, 1982;Dancik & Yeh, 1983;Ledig & Conckle, 1983;Kremer et at., 1991). Recent work has shown that within tree populations, in many cases, gene diversity is not randomly distributed (Knowles, 1991;Perry & Knowles, 1991;Sork et at., 1993).…”

Section: Introductionmentioning

confidence: 99%

Intraspecific genetic structure in a mixed population of Quercus petraea (Matt.) Leibl and Q. robur L.

1994

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The intraspecific genetic structure of a mixed population of sessile and pedunculate oak was studied in the Petite Charnie Forest, Sarthe, France, using enzyme electrophoresis. Spatial structure was analysed by calculating F-statistics and autocorrelations at different scales of spatial subdivision of the population. F-statistics were also used to compare the genetic structure of groups of trees subdivided according to the phenology of flowering. Spatial organization of phenology of flowering was studied with autocorrelation methods. In both species, a highly significant heterozygote deficiency was found at the population level. Spatial genetic structure was at least partially responsible for this deficiency, as demonstrated by the variations observed in F-statistics in relation to the size of this population subdivision. The significance of the observed structure was confirmed by comparison with a null hypothesis generated with the help of permutation analysis. We suggest that the limited dispersal of pollen and/or seeds in the stand gave rise to a family structure. The autocorrelation in phenology of flowering found in both species could contribute to lower the neighbourhood size and then to increase the Wahlund effect. Autocorrelation analyses allowed us to show that heterogeneity of patterns of structure among loci was present. Other possible causes of the genetic structure and its heterogeneity are discussed.

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“…This deficit has been explained by structuration within populations (Sork et al, 1993) which induces a Wahlund effect (Ducousso et al, 1993) and by assortative mating.…”

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Self- and cross-pollination effects on pollen tube growth and seed set in holm oak Quercus ilex L (Fagaceae)

Yacine

Bouras

1997

Ann. For. Sci.

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Summary -Patterns of the self-incompatibility system have been more often described for hermaphroditic, entomophilous and short-lived plant species. Quercus ilex is a long-lived, monoecious, anemophilous and highly self-incompatible species. We used pollination experiments to investigate phenotypic responses of the self-incompatibility system. Flowers from 14 individuals of the same stand were hand-pollinated with self-pollen, cross-pollen from a single donor and a mixture of the two types. We observed a slower pollen tube growth and no or nearly no seed production after self-pollination. The more self-pollen tubes reach the style, the more flowers will stop their ovule development, resulting in a high flower abortion rate. In open pollination, pollen load is not a limiting factor, but incompatible pollen may reach stigma simultaneously or before compatible cross-pollen, which will induce an early abortion of flowers. When pollination is qualitatively and quantitatively effective, the regulation of seed production related to the resources availability acts by the late abortion of fruit.self-incompatibility / pollen tube growth / seed set / Quercus ilex L Résumé -Effets de l'auto-et de l'allopollen sur la croissances des tubes polliniques et la production de fruits chez le chêne vert (Quercus ilex L). Les

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Macrogeographic and fine-scale genetic structure in a North American oak species, Quercus rubra L

Cited by 41 publications

References 27 publications

Joint analysis of spatial genetic structure and inbreeding in a managed population of Scots pine

Joint analysis of spatial genetic structure and inbreeding in a managed population of Scots pine

Intraspecific genetic structure in a mixed population of Quercus petraea (Matt.) Leibl and Q. robur L.

Self- and cross-pollination effects on pollen tube growth and seed set in holm oak Quercus ilex L (Fagaceae)

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