An alternative route of bacterial infection is associated with a polymorphism at an alternative resistance locus.
Abstract
In the Daphnia magna–Pasteuria ramosa host–parasite system, the most important step of the infection process is the one in which P. ramosa spores attach to the host’s foregut. Here we describe a new parasite genotype, which, unlike previously studied genotypes, attaches to the host’s hindgut, not to its foregut. Host resistance shows great diversity across natural populations. Using a QTL approach, we detected one QTL that co-localizes with the previously described locus of resistance to foregut attachment, and a second, major QTL located in an unlinked genomic region. We find no evidence of epistasis.
Type
Publication
In Heredity
