Table 1 Geographic origin of the 44 isolates of N. ditissima used in this study. Number 1–38 were isolated in 2013 and the remainder in 2014

Isolate 1

139272

Aroma

Jonstorp, Sweden (N 56°13', E 12°40')

Isolate 2

139273

Ingrid Marie

Jonstorp, Sweden

Isolate 3

139271

Rubinstar

Jonstorp, Sweden

Isolate 4

139269

Åkerö

Julita, Sweden (N 59°11', E 16°1')

Isolate 5

139270

Norrstack

Julita, Sweden

Isolate 6

139388

Oranie

Jönköping, Sweden (N 57°46' N, E 14°9')

Isolate 7

139268

James Grieve

Jönköping, Sweden

Isolate 8

139390

Discovery

Kivik, Sweden (N 55°41', E 14°13')

Isolate 9

139389

Ingrid Marie

Kivik, Sweden

Isolate 10

139265

John Standish

Balsgård, Sweden (N 56°6', E 14°9')

Isolate 11

139267

Brite Spur

Balsgård, Sweden

Isolate 12

139327

Pigeon

Balsgård, Sweden

Isolate 13

139266

McIntosh

Balsgård, Sweden

Isolate 14

139255

Tompkin’s King

Balsgård, Sweden

Isolate 15- RP1A1

139260

Red Delicious

Balsgård, Sweden

Isolate 16- RP2A1

---------

Red Delicious

Balsgård, Sweden

Isolate 17- RP3A1

---------

Red Delicious

Balsgård, Sweden

Isolate 18- RP3A2

---------

Red Delicious

Balsgård, Sweden

Isolate 19- RP3A3

---------

Red Delicious

Balsgård, Sweden

Isolate 20

139262

Beacon

Balsgård, Sweden

Isolate 21- HP1A1

139263

Holsteiner Cox

Balsgård, Sweden

Isolate 22- HP1A2

---------

Holsteiner Cox

Balsgård, Sweden

Isolate 23- HP1A3

---------

Holsteiner Cox

Balsgård, Sweden

Isolate 24- HP3A1

---------

Holsteiner Cox

Balsgård, Sweden

Isolate 25- HP3A2

---------

Holsteiner Cox

Balsgård, Sweden

Isolate 26- HP2A1

---------

Holsteiner Cox

Balsgård, Sweden

Isolate 27- HP2A2

---------

Holsteiner Cox

Balsgård, Sweden

Isolate 28- HP2A3

---------

Holsteiner Cox

Balsgård, Sweden

Isolate 29

139264

Freiherr von Berlepsch

Balsgård, Sweden

Isolate 30- GP1A1

139261

Gravensteiner

Balsgård, Sweden

Isolate 31- GP1A2

---------

Gravensteiner

Balsgård, Sweden

Isolate 32- GP1A3

---------

Gravensteiner

Balsgård, Sweden

Isolate 33- GP2A1

---------

Gravensteiner

Balsgård, Sweden

Isolate 34- GP2A2

---------

Gravensteiner

Balsgård, Sweden

Isolate 35- GP2A3

---------

Gravensteiner

Balsgård, Sweden

Isolate 36

139275

Gloster

Bjärred, Sweden (N 55°43', E 13°1')

Isolate 37

139274

Ingrid Marie

Bjärred, Sweden

Isolate 38

139503

Elise

Bjärred, Sweden

Isolate 39

139259

Discovery

Gembloux, Belgium N 54°34', E 4°42')

Isolate 40

139257

Api Etoile

Gembloux, Belgium

Isolate 41

139256

Baron

Gembloux, Belgium

Isolate 42

139258

Reinette

Gembloux, Belgium

Isolate 43

139277

Eva-Lotta

Stockholm, Sweden (N 59°19', E 18°4')

Isolate 44

139276

Södermanlandsäpple

Stockholm, Sweden