American Seed Trade Association
Association of Official Seed Certifying Agencies (AOSCA)
     - AOSCA Seed Certifying Agencies
     - AOSCA Foundation Seed Organizations
California Farm Bureau
California Seed Association
California Cooperative Rice Research Foundation, Inc. / Rice Experiment Station
California Wheat Commission
National Alfalfa and Forage Alliance
Pacific Seed Association
SIPA - Seed Innovation and Protection Alliance

California Dept of Food and Agriculture Seed Law Enforcement
California Seed Law 2020 (pdf)
County Agricultural Commissioners and Sealer Contacts

OECD: List of Varieties Eligible for Certification
OECD: USA varietal search page
OECD: International varietal search page 
OECD: Seed Scheme

Animal and Plant Health Inspection Service: APHIS
Federal Seed Act
National Plant Germplasm System: GRIN
USDA AMS-ARS Plant Variety Protection Office: PVP
USDA AMS PVP Variety Certificate Status
USDA AMS Seed Regulatory Testing Services
USDA National Organic Program

UC Davis
UC Davis Foundation Seed Program
College of Agriculture, UCD
Division of Agriculture and Natural Resources: ANR
Cooperative Extension and Agricultural Experiment Stations
Department of Plant Sciences, UCD
Seed Biotechnology Center