CIVG 198
ActiveMalus domestica (Suckow) Borkh. · Apple
Tagliani Francesco, Castagnoli Gianfranco, Leis Michelangelo, Martinelli Alessio
10 August 2026
The M 9 T337 rootstock is a clone of M9 and is used for grafting apple fruit varieties. It significantly restricts the vigor of the scion, keeping tree height within 2.5–2.7 meters, which is 25–40% of the size of trees on seedling rootstocks.
The root system of the rootstock is superficial, so trees require permanent support throughout their life. The plant shows resistance to Phytophthora root rot, but is sensitive to fire blight, low temperatures, and soil waterlogging.
2 jurisdictions
Green indicates countries where the variety is listed in the national catalogue and its seeds are authorized for sale. Expired registrations are marked separately: the variety was previously admitted, but sale is no longer permitted.
A single variety may be registered in different countries under different names. All records are consolidated into one profile based on the breeder's code—an internal number that is identical for the variety across all registries.
The primary name shown is the one under which the variety is registered in the largest number of jurisdictions. Search finds the variety by any of its names.
The variety is listed in the national registry — its seeds are authorized for sale in this country.
№ APP599
Records are sourced from official registry publications. Data sources and legal status
The directory replicates the primary source. If an entry differs from the official publication, please specify the discrepancy and provide a link if possible. Corrections are added to the moderation queue.
This is a directory, not an official registry: data is based on public disclosures and may have changed. More about sources
Same species
Malus domestica (Suckow) Borkh. · Apple
Tagliani Francesco, Castagnoli Gianfranco, Leis Michelangelo, Martinelli Alessio
Malus domestica (Suckow) Borkh. · Apple
STICHTING WAGENINGEN RESEARCH-WAGENINGEN PLANT RESEARCH
Malus domestica (Suckow) Borkh. · Apple
Washington State University, USA
Malus domestica (Suckow) Borkh. · Apple
Malus domestica (Suckow) Borkh. · Apple
Nicolai, Rene|Alken, Belgium
Malus domestica (Suckow) Borkh. · Apple
Nearby in the species list M 26, M 26 IVT, M 26 NAKB, M 27, M 4, M 7, M 8, M 9, M 9 Fl.56, M 9 RN.29, M'BRIACHELLA, M111, M9EMLA, M9kl29, M9kl36, M9PAJAM2CEPILAND, Mac Intosh, Mac Intosh Red, Mac Spur, Maçã Ácida de Santos Evos