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Patterns of genetic diversity and differentiation in resistance gene clusters of two hybridizing European Populus species

Caseys, Celine ; Stölting, Kai ; Barbará, Thelma ; González-Martínez, Santiago ; Lexer, Christian

In: Tree Genetics & Genomes, 2015, vol. 11, no. 4, p. 1-12

Patterns of genetic diversity and differentiation in resistance gene clusters of two hybridizing European Populus species

Casey, Céline ; Stölting, Kai N. ; Barbará, Thelma ; González-Martínez, Santiago C. ; Lexer, Christian

In: Tree Genetics & Genomes, 2015, vol. 11, no. 4, p. 1–12

Resistance genes (R-genes) are essential for long-lived organisms such as forest trees, which are exposed to diverse herbivores and pathogens. In short-lived model species, R-genes have been shown to be involved in species isolation. Here, we studied more than 400 trees from two natural hybrid zones of the European Populus species Populus alba and Populus tremula for microsatellite markers...

Molecular phylogenetics of the Brazilian giant bromeliads (Alcantarea, Bromeliaceae): implications for morphological evolution and biogeography

Versieux, Leonardo M. ; Barbará, Thelma ; Wanderley, Maria das Graças Lapa ; Calvente, Alice ; Fay, Michael F. ; Lexer, Christian

In: Molecular Phylogenetics and Evolution, 2012, p. -

The genus Alcantarea comprises near 30 species endemic to rocky outcrops from eastern Brazil. Most species are ornamental and several are threatened due to habitat loss and over collection. In this paper we examine the phylogenetics of Alcantarea and its relationship with the Brazilian members of Vriesea, a genus of which Alcantarea has been treated as a subgenus. We discuss the morphological...