Table 3.
Cultivars with low susceptibility to powdery mildew. Apple cultivars of the JKI collection with susceptibility rating scales 1 (no symptoms) and 2 (1 sporolating spot) in 2012 to 2013 are listed. Additional data from experiments obtained in 1997, 1999 and from 2006 to 2007 are supplemented. R genes indicated by the respective marker allele(s) from molecular analysis are given.
| Cultivar | 1997 * | 1999 * | 2006–2007 ** | 2012–2013 | Average (Median) | R Genes Indicated by Respective Marker Alleles |
|---|---|---|---|---|---|---|
| Altländer Pfannkuchenapfel | 2 | 5 | 5 | 2 | 3.5 | |
| Altländer Rosenapfel a | 2 | 5 | 5 | 2 | 3.5 | |
| Antonovka Polutorafuntovaâ | 2 | 3 | 3 | 2 | 2.5 | |
| Ariwa a | n.d. | 3 | 3 | 2 | 3 | Pl1 |
| Ashmeads Kernel | 3 | 4 | 3 | 2 | 3 | |
| Baumanns Renette | n.d. | n.d. | 2 | 2 | 2 | |
| Betzinger Grünapfel | n.d. | n.d. | n.d. | 1 | 1 *** | |
| Böblinger Straßenapfel | n.d. | n.d. | n.d. | 1 | 1 *** | |
| Bockenhusen | n.d. | n.d. | n.d. | 2 | 2 *** | |
| Börtlinger Weinapfel a | 2 | 4 | 2 | 2 | 2 | |
| Bramleys Seedling | 3 | 3 | 4 | 2 | 3 | Pld |
| Bratzelapfel | n.d. | n.d. | n.d. | 2 | 2 *** | |
| Erbachhofer | 2 | 2 | 1 | 2 | 2 | Plm |
| Gaesdonker Renette a | n.d. | n.d. | n.d. | 1 | 1 *** | |
| Gochsheimer a | n.d. | n.d. | n.d. | 1 | 1 *** | |
| Göhrings Renette | n.d. | n.d. | n.d. | 2 | 2 *** | |
| Großer Api | n.d. | n.d. | n.d. | 2 | 2 *** | Plm |
| Hibernal 4n | 2 | 3 | 3 | 2 | 2,5 | |
| Jakob Fischer | 2 | 4 | 2 | 2 | 2 | |
| Jeverländer Süßapfel a | n.d. | n.d. | n.d. | 1 | 1 *** | |
| Juliane | n.d. | n.d. | n.d. | 2 | 2 *** | |
| Kardinal Bea | 2 | 2 | 2 | 2 | 2 | |
| Krügers Dickstiel | 4 | 4 | 2 | 2 | 3 | |
| Laxtons Fortune a | 3 | 4 | 3 | 2 | 3 | |
| Leistadter Rotapfel | n.d. | n.d. | n.d. | 2 | 2 *** | |
| Linsenhofer Sämling a | n.d. | n.d. | n.d. | 2 | 2 *** | |
| Peasgoods Sondergleichen | 1 | 2 | 3 | 2 | 2 | |
| Pfaffenhofer Schmelzling | n.d. | n.d. | n.d. | 2 | 2 *** | |
| Pomme d’Or | n.d. | n.d. | n.d. | 1 | 1 *** | |
| Porzenapfel a | n.d. | n.d. | 3 | 2 | 2.5 | |
| Präsident Decour | n.d. | n.d. | n.d. | 2 | 2 *** | |
| Prima | n.d. | n.d. | n.d. | 1 | 1 *** | |
| Realka a | 3 | 2 | 3 | 2 | 2,5 | |
| Riesenboiken | 2 | 3 | 2 | 2 | 2 | |
| Roter Altländer Pfannkuchenapfel | 4 | 5 | 3 | 2 | 3.5 | |
| Roter Sossenheimer | n.d. | n.d. | n.d. | 2 | 2 *** | |
| Schöner aus Elmpt a | n.d. | n.d. | n.d. | 2 | 2 *** | |
| Sonnenwirtsapfel | n.d. | n.d. | n.d. | 1 | 1 *** | |
| Sulinger Grünling | n.d. | n.d. | n.d. | 2 | 2 *** | |
| Virginia Crab | n.d. | n.d. | n.d. | 1 | 1 *** | Pl1 |
| Welschweinling | 2 | 5 | 4 | 2 | 3 | |
| Wildeshausener Goldrenette | 1 | 3 | 7 | 1 | 2 |
* data obtained from the Institute for Plant Genetics and Research on Cultivated Plants in the Fruit Gene bank Dresden the predecessor of the today’s institution and partly published [15,16]; ** results obtained from phenotyping powdery mildew in the same plot at JKI in 2006 and 2007 like in 1997 and 1999; *** phenotyping recorded only in 2012–2013; a cultivars with low susceptibility to both diseases, scab and powdery mildew; n.d. not determined.