If truss was build as a one piece truss it shouldn t be center bearing.
Truss roof load bearing wall.
If there is a column that supports the truss found in the wall the wall still would not be load bearing because the column is taking the load.
When joists trusses are perpendicular to the wall and bear o n the top of the wall that wall is bearing wall.
Joists are rarely continuous over the top of a wall instead they are often spliced over the top of the wall as dimensional lumber only available in specific lengths.
Having said that i d still just put a dbl 2x10 w ply flitch header in call it a day.
Load bearing interior wall under truss roof.
If there is a truss over the wall the wall is probably not load bearing since the truss bears the load.
An example of a load bearing wall call be seen on the right.
Engineered roof truss systems may be designed to eliminate the need for load bearing walls or change where the bearing walls are located.