Reduced Research Time
Reduced research time (RRT) is a bonus that can be obtained from Evolved Bacteria or Dark Matter Institute. It decreases the time that it takes to complete all activities in the Research Labs with the exception of sending and recalling Scientists in the Planetary Research section.
If you have already started a research, then changes to your RRT will no longer affect it.
The RRT bonuses from different Evolved Bacteria are not additive. Instead, each Evolved Bacteria with the bonus reduces the research time remaining instead of the original research time. 
For example, if the player has three Evolved Bacteria equipped with RRT of 13.3%, 12.1%, 13.8%, then the total RRT would be 34.3% not 39.2%. 
This means that it's practically impossible to reach 100% RRT.
The RRT displayed in the Bacteria Evolution menu does not include reductions to research time from Dark Matter Institute.