Quercus Genetics
Quercus Genetics

Author: Mary V Ashley

Publisher: Mdpi AG

Published: 2022-01-14

Total Pages: 148

ISBN-13: 9783036528786

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The genus Quercus (Quercus, Fagaceae) comprises more than 400 species distributed throughout the northern hemisphere. While the highest oak diversity occurs in American and Asia, European species are also widespread. Oaks are ecological dominants of many temperate forests, and evergreen species are major components of Mediterranean and subtropical woodlands. They provide important ecosystem services and valuable timber. Oak species exhibit high genetic diversity, and this diversity has provided a wealth of information regarding oak ecology and evolution. Recent genetic and genomic studies of oaks have unraveled their evolutionary origins, history, and past radiations. Genetic approaches have also been applied to learn about more recent events, such as range expansions and contractions occurring at northern latitudes.

Patterns of genetic varition and hybridization in a mixed oak (Quercus spp.) forest
Patterns of genetic varition and hybridization in a mixed oak (Quercus spp.) forest

Author:

Publisher: Cuvillier Verlag

Published: 2006-08-29

Total Pages: 174

ISBN-13: 3736919972

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The present study is the first documentation on genetic variation and hybridization within such a complex natural community of oak species (Quercus spp.). It is also the first report of the use of microsatellite analysis in Q. frainetto, a relatively widespread species in the Balkan region and in southern Italy. Multiple morphological characters as well as three types of genetic markers were used to discriminate between species and their hybrids. In addition, paternity analysis was performed to retrace the patterns of contemporary gene flow and hybridization within this species-rich oak community. Both chloroplast and nuclear genetic markers discriminated clearly between Q. cerris and the group consisting of the four other white oak species, which is consistent with the taxonomical scheme. In contrast, within the white oak group, the species shared the most common chloroplast haplotypes which might be interpreted as an evidence for interspecific gene flow in a relatively recent past. Both categories of nuclear markers, isozymes and microsatellites, have revealed high levels of genetic variation within species. The amount of genetic differentiation estimated across all loci using nuclear markers was always significant (P