- CGN: M. hapla (84 observations), M. chitwoodi (79 observations), M. fallax (77 observations) from Janssen et al. 1996 doi:10.1007/BF00037110. Together in online search .
- GRIN: M. hapla (1100 partly overlapping acc.), M. chitwoodi relevant webpage category: Nematode, traits 6-15 (partly overlapping).
- VIR: Data on M. hapla (172 acc.) and M. chitwoodi (42 acc.) resistance not yet on-line, but downloadable in a combined data set of the European potato genebanks.
- CIP advanced clones with resistance data on M. hapla (?).