Producing or tending to produce superior or excellent qualities; relating to the origin or generation of excellence.
From Greek aristos (best) plus -genic (producing). This scientific adjective describes things that generate or develop superior characteristics.
If you describe a breeding program as aristogenic, you're saying it's designed to create better animals, which sounds scientific but is actually pretty controversial because people argued about what 'better' even means!
Complete word intelligence in one call. Free tier — 50 lookups/day.