Watch the Bluegrass Solo online guitar lesson by Jason Loughlin from Essentials: Country Soloing Styles
We start with a fiddle legato that leads us into the major scale pattern over the G chord. I'm using a two measure tail outlining and embellishing the D7 arpeggio to lead back to the G chord. When I land on the G I begin a scale pattern that embellishes each chord tone with a half step approach.
Next use our IV sub over the G. This means I'm outlining a C triad over a G chord and then resolving it. A one measure tail leads us into the IV chord, where we'll do scale runs descending and ascending from the root. I'll anticipate that change back to G by using a G blues lick before the chord changes. Over the D7, I'm using half step approaches to the 5th and 3rd and ending with a bluesy lick over the I chord.