00448nas a2200133   4500008004100000245010300041210006900144260000900213300001200222490000600234100001400240700001700254856004300271       1996                        eng d00aMicrosatellite analysis of seed dispersal and parentage of saplings in bur oak, Quercus macrocarpa0 aMicrosatellite analysis of seed dispersal and parentage of sapli  c1996  a615-6270 v51 aDow, B.D.1 aAshley, M.V.  uhttps://quercus.myspecies.info/node/7300471nas a2200145   4500008004100000245010000041210006900141260000900210300001200219490000700231100001400238700001700252700001300269856004300282       1995                        eng d00aCharacterization of highly variable (GA/CT)n microsatellites in the bur oak, Quercus macrocarpa0 aCharacterization of highly variable GACTn microsatellites in the  c1995  a137-1410 v911 aDow, B.D.1 aAshley, M.V.1 aHowe, H.  uhttps://quercus.myspecies.info/node/7401878nas a2200157   4500008004100000245012900041210006900170260000900239300001400248490000700262520134300269100001601612700001701628700001701645856005801662       2002                        eng d00aLimited hybridization between Quercus lobata and Quercus douglasii (Fagaceae) in a mixed stand in central coastal California0 aLimited hybridization between Quercus lobata and Quercus douglas  c2002  a1792-17980 v893 aMany oak species are interfertile, and morphological and genetic evidence for hybridization is widespread. Here we use DNA microsatellite markers to characterize hybridization between two closely related oak species in a mixed stand in central coastal California, Quercus lobata (valley oak) and Q. douglasii (blue oak) (Fagaceae). Genotypes from four microsatellite loci indicate that many alleles are shared between the two species. However, each species harbors unique alleles, and allele frequencies differ significantly. A Bayesian analysis of genetic structure in the stand identified two highly differentiated genetic clusters, essentially corresponding to species assignment based on morphology. Data from the four loci were sufficient to assign all 135 trees to one of the two species. In addition, five putative hybrid individuals having intermediate morphologies could be assigned genetically to one or the other species, and all but one had low probability of hybrid ancestry. Overally, only six (4.6%) trees showed >0.05 probability of hybrid ancestry, in all cases their probabilities for nonhybrid ancestry were substantially higher. We conclude that adult hybrids of Q. douglasii x Q. lobata are rare at this site and plasticity in morphological characters may lead to overestimates of hybridization among Quercus species.1 aCraft, K.J.1 aAshley, M.V.1 aKoenig, W.D.  uhttp://www.amjbot.org/cgi/content/abstract/89/11/179202094nas a2200205   4500008004100000245007500041210006900116260000900185300001200194490000700206520149700213653001801710653002001728653003001748653002001778653001601798100001401814700001701828856004301845       2002                        eng d00aFactors influencing male mating success in bur oak, Quercus macrocarpa0 aFactors influencing male mating success in bur oak Quercus macro  c2002  a161-1800 v153 aPollen donors of acorns and saplings in a stand of bur oak were identified by paternity exclusion using microsatellite genotype analysis. Here we examine the influence of several factors likely to affect reproductive success of males with wind-dispersed pollen, including distance of pollen donor from maternal tree, genetic relatedness of pollen donor to maternal tree, direction of pollen donor relative to maternal tree, and size of pollen donor (crown volume and trunk diameter). Surprisingly, none of these factors were strongly correlated with fertilization success, although weak but significant correlations with crown volume and distance were found. The slight influence of distance is actually overestimated here, because our analysis necessarily excluded a large proportion of pollinations that were effected by trees outside the stand. The pollen donors outside the stand were not identified, but were more than 150 meters away. Pollination patterns in this stand of bur oak are quite complicated. Seed parents were fertilized by multiple pollen donors within the stand from all directions and as far as 200 m away. These results caution against the use of models of pollination that are based on simple distance or directional parameters because they will not adequately predict gene flow or male reproductive success. Our results further emphasize the importance of genetically identifying successful pollen donors rather than relying on patterns of physical movement of pollen.10afemale choice10aforest genetics10amale reproductive success10amicrosatellites10apollination1 aDow, B.D.1 aAshley, M.V.  uhttps://quercus.myspecies.info/node/4801092nas a2200145   4500008004100000245008900041210006900130260000900199300001200208490000700220520064300227100001600870700001700886856004300903       2006                        eng d00aPopulation differentiation among three species of white oak in northeastern Illinois0 aPopulation differentiation among three species of white oak in n  c2006  a206-2150 v263 aWe used microsatellite DNA analysis to examine population differentiation among three species of whiteoak, Quercus alba L., Quercus bicolor Willd., and Quercus macrocarpa Michx., occurring in both pure and mixed stands in northeastern Illinois. Using individual-based Bayesian clustering or principal components analyses, no strong genetic groupings of individuals were detected. This suggests that the three species do not represent distinct and differentiated genetic entities. Nevertheless, traditional approaches where individuals are pre-assigned to species and populations, including F statistics, allele frequency analysis, and Nei1 aCraft, K.J.1 aAshley, M.V.  uhttps://quercus.myspecies.info/node/28