Phylogeny of ambrosia beetle symbionts in the genus Raffaelea.

Fungal Biol

School of Forest Resources and Conservation, University of Florida, Gainesville 32611, USA. Electronic address:

Published: December 2014

AI Article Synopsis

  • The genus Raffaelea was created in 1965 to classify symbiotic fungi associated with ambrosia beetles, starting with Raffaelea ambrosia.
  • New species have been added, including significant tree pathogens like Raffaelea quercivora and Raffaelea lauricola, which cause oak and laurel wilt.
  • This paper provides a detailed phylogenetic analysis of Raffaelea, revealing that the current classification is not monophyletic, and introduces a refined definition of the genus.

Article Abstract

The genus Raffaelea was established in 1965 when the type species, Raffaelea ambrosia, a symbiont of Platypus ambrosia beetles was described. Since then, many additional ambrosia beetle symbionts have been added to the genus, including the important tree pathogens Raffaelea quercivora, Raffaelea quercus-mongolicae, and Raffaelea lauricola, causal agents of Japanese and Korean oak wilt and laurel wilt, respectively. The discovery of new and the dispersal of described species of Raffaelea to new areas, where they can become invasive, presents challenges for diagnosticians as well as plant protection and quarantine efforts. In this paper, we present the first comprehensive multigene phylogenetic analysis of Raffaelea. As it is currently defined, the genus was found to not be monophyletic. On the basis of this work, Raffaelea sensu stricto is defined and the affinities of undescribed isolates are considered.

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http://dx.doi.org/10.1016/j.funbio.2014.09.001DOI Listing

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