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Updated: Jul 19, 2026

A Technique to Screen American Beech for Resistance to the Beech Scale Insect (Cryptococcus fagisuga Lind.)
Published on: May 27, 2014
Blind population genetics survey of tropical rainforest trees
Jérôme Duminil1, Henri Caron, Ivan Scotti
1INRA, UMR Biodiversity, Genes and Ecosystems, 69 route d'Arcachon, F-33612 Cestas Cedex, France.
Abstract:
Rainforest tree species can be difficult to identify outside of their period of reproduction. Vascular tissues from Carapa spp. individuals were collected during a short field trip in French Guiana and analysed in the laboratory with nuclear and chloroplast markers. Using a Bayesian approach, > 90% of the samples could be assigned to one of two distinct clusters corresponding to previously described species, making it possible to estimate the genetic structure of each species and to identify cases of introgression. We argue that this blind procedure represents a first-choice rather than a fallback option whenever related taxa are investigated.
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