When you breed the plants as has already been done you are changing it genetically in a unique way. You have no idea what changes you are doing. Breeding causes more changes than GM.
The patents today and now around what you made not the sequences. Sequences are so easy to get - mapping the genome doesn't give you are real rights.

You have to make something that is useful and works before a patent is worth anything.  You can sequence this is a lunch break and publish it online for free use. But when someone makes a very different line with specific properties you can patent that with or without the sequence. It doesn't need to be GM