1. Division of Environment and Natural Resources NIBIO Norwegian Institute of Bioeconomy Research NO‐4886 Grimstad Norway
2. Division of Biotechnology and Plant Health NIBIO Norwegian Institute of Bioeconomy Research NO‐1433 Ås Norway
3. Botaniska Analysgruppen SE‐41319 Göteborg Sweden
4. Asbjørn Nyholt ApS DK‐5772 Kværndrup Denmark
5. Mycology and Nematology Genetic Diversity and Biology Lab. United States Department of Agriculture Agricultural Research Service 10300 Baltimore Avenue Beltsville MD 20705