What species is noted in genetic research as potentially contributing minor introgression during the early stages of domestic chicken domestication?

Answer

The Grey Junglefowl (*Gallus sonneratii*)

Some research indicates a minor introgression, or mixing, from the Grey Junglefowl (*Gallus sonneratii*) may have occurred in the early stages of domestic chicken domestication.

What species is noted in genetic research as potentially contributing minor introgression during the early stages of domestic chicken domestication?
speciesbirdanimalstatusjunglefowl