REMAINING QUESTIONS. “This may explain why, to our knowledge, there are no reports of strains from these supergroups inducing CI. However, divergent Type V cif genes are found in other Rickettsiales, and here their phenotypic effects are uncertain. Gillespie et al. (2018) proposed that cif homologs found in Rickettsia may induce other reproductive phenotypes.” (CI = cytoplasmic incompatibility).
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