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| Maintainer Company Name | Varieties Owned | |
| ABI Alfalfa, Inc. | 1 | Company Details... |
| ACI Seeds | 2 | Company Details... |
| Adams Seed, Inc. | 2 | Company Details... |
| Advanta Seeds Pacific, Inc. | 186 | Company Details... |
| Advanta US, Inc. | 12 | Company Details... |
| Ag Alumni Seed | 48 | Company Details... |
| Ag-One Seed Co. | 2 | Company Details... |
| Agra Seed Research Int. | 0 | Company Details... |
| Agra Societa del Seme srl | 0 | Company Details... |
| AgReliant Genetics LLC | 92 | Company Details... |
| AgResearch Consultants, Inc. | 12 | Company Details... |
| Agricultural Research Service U.S.D.A. | 7 | Company Details... |
| Agrigenetics L.P. | 50 | Company Details... |
| Agrinetics Inc. | 2 | Company Details... |
| AgriPro Seeds Inc. | 1 | Company Details... |
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