Here are the top 10 biotechnology journals based on their impact factor, as reported by the Journal Citation Reports (JCR) for 2020:

1. Nature Biotechnology – IF: 49.496
2. Annual Review of Biomedical Engineering – IF: 32.333
3. Trends in Biotechnology – IF: 15.090
4. Biotechnology Advances – IF: 13.189
5. Current Opinion in Biotechnology – IF: 9.518
6. Biotechnology Journal – IF: 6.121
7. Journal of Biotechnology – IF: 4.496
8. Journal of Industrial Microbiology & Biotechnology – IF: 3.172
9. BMC Biotechnology – IF: 2.769
10. Applied Microbiology and Biotechnology – IF: 3.422

These journals cover a wide range of topics in biotechnology, including bioprocessing, bioengineering, genetic engineering, gene therapy, drug development, and more. They are highly respected and influential publications in the field, and their articles are often cited by researchers and professionals in biotechnology.