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Identification of hybrids betweenQuercus petraea andQ. robur (Fagaceae): Results obtained with RAPD markers confirm allozyme studies based on theGot-2 locus
Authors:Rosabelle Samuel
Institution:(1) Institut für Botanik und Botanischer Garten, Universität Wien, Rennweg 14, A-1030 Wien, Austria
Abstract:RAPDs were employed as genetic markers to detect interspecific hybridization between the closely related oak speciesQuercus robur andQ. petraea. Fourteen primers were used in order to check the genetic status (ldquopurerdquo or hybrid) of individuals classified morphologically. Among the 147 PCR fragments obtained 11 appear to be species-specific. In the phenotypically intermediate individuals different combinations of these species-specific bands were obtained. The patterns in these putative hybrids were not additive, which may be either the result of repeated backcrossing and introgression between the two species or of heterozygosity within the parental species. The results of the RAPD study are consistent with morphological analyses and allozyme data obtained for theGot-2 locus. Thus the RAPD markers used in this study may provide a powerful genetic tool for the identification of hybrids and the discrimination between the two ldquopurerdquo species.
Keywords:Fagaceae  Quercus  Hybridization  RAPD  allozymes
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