AMD and Intel both have their own motherboards. Starting with the Athlon family of processors motherboards that support AMD processors only support AMD processors.
AMD processors use to work on the same boards as intel back in the days of the original Pentium. The K6/2 and K6/3 used an intel socket 7 motherboard.
In the same way Intel boards are Intel boards with a few exceptions. VIA makes a processor that works on an intel board but there is no reason you'd want to get one.
The fact that AMD has their own boards now is a strength rather than a weakness. Motheroboard chipsets are now taylor made for AMD processors instead of AMD having to make their processors run on Intel boards.