So out of curiosity how do you think we should develop GMO crops without patents? These things cost billions of dollars in very hard R&D to develop and bring to market. Without a patent then anyone will grow some of your seeds and then sell them next year to compete with your seeds and they had to do none of the work.
If you want to replace this system you must come up with an alternative.
No patents on living organisms would also screw over the biotech industry. What if I make a new tumor supressor gene from scratch that is better than any human gene and would 100% prevent cancer. As soon as I treated the first person someone would just have their DNA read and find the sequence and sell it without doing any of the R&D.
I understand not liking patents on living things but if you want technology developed our current economic system required a profit motive and without that motive the technology won't be created. This is not like computer programming where a few people on no budget can do amazing work and change things. This stuff is insanely expensive and hard to do. Reaction ingredients alone would bankrupt most people.