Facultative symbiont virulence determines horizontal transmission rate without host specificity in Dictyostelium discoideum social amoebas

In facultative symbioses, only a fraction of hosts are associated with symbionts. Specific host and symbiont pairings may be the result of host-symbiont coevolution driven by reciprocal selection, or priority effects pertaining to which potential symbiont became associated with a host first. Distinguishing between these possibilities is important for understanding the evolutionary forces that affect facultative symbioses. We used the social amoeba Dictyostelium discoideum and its symbiont Paraburkholderia bonniea to determine whether ongoing coevolution affects which host-symbiont strain pairs naturally co-occur within a facultative symbiosis. Relative to other Paraburkholderia, including another symbiont of D. discoideum, P. bonniea features a reduced genome size that indicates a significant history of coevolution with its host. We hypothesized that ongoing host-symbiont coevolution would lead to higher fitness for naturally co-occurring (native) host and symbiont pairings compared to ..., , , # Data from: Facultative symbiont virulence determines horizontal transmission rate without host specificity in Dictyostelium discoideum social amoebas

These data support the Evolution Letters article published under the same title. The same data are also available [here](https://github.com/noh-lab/social-infection).

It contains:

* **host_fitness.clean.20220711.txt** - Data from host fitness experiment with columns in the following order
* host identity
* symbiont identity
* MOI (multiplicity of infection) of host-symbiont pairing
* date of experiment
* estimated total number of host spores produced by sample
* percent of host spored infected by symbiont in sample
* percent of spores produced by sample relative to mean of uninfected controls
* type of host-symbiont pairing
* **symbiont_transmission.clean.20220711.txt** - Data from symbiont transmission experiment with columns in the following order
* host identity
* sy...