Host Specialization in BYDV Vectors and Its Impact on Virus Spread

摘要

The Barley yellow dwarf virus (BYDV) pathosystem is a good model for the study of the evolution of interactions in a system with three biological components, a host, a pathogen and its vector. It allows in particular to assess the consequences of hostspecialization of the vector on the evolution of plant-virus interactions. The results presented here are part of this project. Host-specialization has been shown in various aphids such as the peach-potato aphid Myzus persicae (Zitoudi et al, 2001) or the English grain aphid, Sitobion avenae (Haack et al, 2000) and extensively studied in the pea aphid, Acyrthosiphon pisum (Via 1991a, 1991b, 1999). Similarly, a variability of different clones in their ability to transmit some viruses has been shown in M. persicae for the PLRV (Potato leafroll virus) by Bourdin et al (1998) and Terradot et al (1999) or in S. avenae for the BYDV-PAV (Papura et al, 2002). However, host specialization and ability to carry a virus have never been studied simultaneously.