Abstracts (first author)

Invited Speaker 

Observing evolution in action: HIV and its coevolution with the host immune system

Author(s): Neher RA

Summary:

The immune system of a HIV infected individual is constantly fighting the virus. In absence of treatment, this battle is ultimately lost in the great majority of cases since the virus changes rapidly to evade the immune pressure. I will show how relevant evolutionary parameters such as typical selection coefficients and recombination rates can estimated from time series data of HIV. Standard population genetic methods are often inappropriate to analyze HIV data, since the viral population experiences strong positive selection at many sites. This implies that the relevant stochastic force in HIV evolution is not genetic drift but selection on linked sites or genetic draft and methods based on the neutral coalescent do not work. I will then discuss recent progress in developing a theory of rapidly adapting populations such as HIV. In models of rapid adaptation, genealogies are different from the standard Kingman coalescent but display frequent multi-merger event. Their statistic is described by the Bolthausen-Sznitman coalescent. These results allow us to calculate levels of neutral diversity, site frequency spectra, and the scale of linkage disequilibrium from parameters of the model.



Contacts

Chairman: Octávio S. Paulo
Tel: 00 351 217500614 direct
Tel: 00 351 217500000 ext22359
Fax: 00 351 217500028
email: mail@eseb2013.com

Address

XIV Congress of the European Society for Evolutionary Biology

Organization Team
Department of Animal Biology (DBA)
Faculty of Sciences of the University of Lisbon
P-1749-016 Lisbon
Portugal

Website

Computational Biology & Population Genomics Group 
Close