Periodic host absence can select for higher or lower parasite transmission rates

Periodic host absence can select for higher or lower parasite transmission rates van den Berg F. auteur aut IRD Bacaër Nicolas auteur aut IRD Metz J. A. J. auteur aut IRD Lannou C. auteur aut IRD van den Bosch F. auteur aut IRD text journalArticle eng text/pdf born digital access This paper explores the effect of discontinuous periodic host absence on the evolution of pathogen transmission rates by using R-0 maximisation techniques. The physiological consequence of an increased transmission rate can be either an increased virulence, i.e. there is a transmission-virulence trade-off or ii) a reduced between season survival, i.e. there is a transmission-survival trade-off. The results reveal that the type of trade-off determines the direction of selection, with relatively longer periods of host absence selecting for higher transmission rates in the presence of a trade-off between transmission and virulence but lower transmission rates in the presence of a trade-off between transmission and between season survival. The fact that for the transmission-virulence trade-off both trade-off parameters operate during host presence whereas for the transmission-survival trade-off one operates during host presence (transmission) and the other (survival) during the period of host absence is the main cause for this difference in selection direction. Moreover, the period of host absence seems to be the key determinant of the pathogen's transmission rate. Comparing plant patho-systems with contrasting biological features suggests that airborne plant pathogens respond differently to longer periods of host absence than soil-borne plant pathogens. specialized Basic reproduction number Damping-off Potato blight Season trade-off Take-all Virulence trade-off Yellow rust 076 020 Evolutionary Ecology 25 1 121-137 2011 0269-7653 https://www.documentation.ird.fr/hor/fdi:010053156 10.1007/s10682-010-9387-0 0269-7653 [F B010053156] https://www.documentation.ird.fr/hor/fdi:010053156 https://www.documentation.ird.fr/intranet/publi/2011/03/010053156.pdf Accès réservé (Intranet de l'IRD) IRD - Base Horizon / Pleins textes 2011-04-07 2017-08-23 fdi:010053156 fre