Parcs

ID	TITEL	DATENTYP	AUTOR	JAHR
28557	Migration und Hybridisierung der Pappelarten im Wiener Raum	Project	Jubiläumsfonds der Stadt Wien für die Österreichische Akademie der Wissenschaften	2006

Bemerkungen/Beschreibung

Schlagwörter: Botanik/Pflanze, Genetik, Populus alba/Silberpappel, Populus tremula/Zitterpappel, Populus x canescens/Graupappel

Barriers to gene flow play a central role in many topics of evolutionary genetics. Species barriers between ecologically divergent forest trees are particularly interesting, because the genes conferring ecological character differences are expected to segregate in hybrids. Hence, hybrid populations offer a powerful tool for the genetic analysis of adaptively important traits. Perhaps the biggest impediment to unlocking the potential of interspecific populations lies in the difficulty of generating multi-generation crosses in long-lived species. Natural hybrid zones offer an attractive alternative: the increased genetic variability and admixture linkage disequilibrium (admixture LD) present in hybrid populations can be utilized for association studies. This approach has been remarkably successful for the study of disease-related genes in admixed human populations. The same methodology is applicable to long-lived trees, but evaluating its potential requires a study system with a favourable setting, i.e., extensive interspecific gene flow, pronounced interspecific character differences, and good genomic resources. We have launched a research program to study the potential of admixture LD  based studies in hybrid zones of Populus alba and Populus tremula in Europe. First results based on nuclear microsatellites and plastid DNA markers indicate that hybrid zones among the two species will be suitable for this purpose.

Eintrag Nr. 31986

Towards the molecular genetic analysis of a barrier to gene flow between two ecologically divergent Populus species, P. alba and P. tremula