The root note of the first chord in C Dorian is a D but the chord is d (D minor) usually indicated by a lower case note letter or lower case roman numeral. Your chord progression would be i IV v (Dminor Gmajor Aminor) The concept of modes is pretty much using a major scale but emphasizing a different chord as the tonic or root.
Well, yes, the notes of C Major imply that the D chord would be a minor, maybe I should have said the chords of a Dorian mode in C would be Dm, Gmaj and Am but I thought that would be obvious.
I'm use to interperiting an upper case note letter as meaning the major triad. My comment was more about nomenclature, you have the concept correct.
That must be so, as I said, I'm still learning, thanks.
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