@Down In A Hole. Body and Neck wood does contribute to the tone of the gutiar. No idea about the Ashwood but since they were used in early Fender days, I pressume it's a bright sounding wood maybe similar to Alder. Mahagony on the other side is a dark wood. Mahagony body guitars have to be EQed with a reasonable amount of treble, otherwise it can sound muddy at the lows.
For the fretboard, normally rosewood or maple or ebony is used. Rosewood is a very dark sounding wood. Ebony is the brightest of these three but the best thing about ebony is it has very close grains and it can give the best finishing for the fretboard. If you want the smoothest fretboard, then ebony should be your choice. Maple lies inbetween Rosewood and Maple in it's tone. Normally Ebony fretboard is used in high end 24 3/4" Scale guitars. The 24 3/4" scale has some mud associated with it. High end Les Pauls have this 24 3/4" and also features a Mahagony Body and Neck. All these are a very dark sounding combination. So Ebony is used to add a good amount of brightness to the dark sounding guitar. This combination can result in a nice bull bodied tone. I haven't come across a guitar which has Alder Body and Ebony fretboard as both these bright woods and maybe if there's one and that too loaded with single coil pickups could keep the Teles out of business.
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