| Ulmus 'Columella' | |
|---|---|
.jpg) 'Columella', Amsterdam. | |
| Genus | Ulmus |
| Hybrid parentage | 'Plantyn' selfed or openly pollinated |
| Cultivar | 'Columella' |
| Origin | Wageningen, The Netherlands |
Ulmus 'Columella' is a Dutch elm cultivar raised by the Dorschkamp Research Institute for Forestry & Landscape Planning, Wageningen. Originally thought to have been derived from a selfed or openly pollinated seedling of the hybrid clone 'Plantyn', DNA analysis later determined it arose from a cross of 'Plantyn' and Ulmus minor. Sown in 1967, it was released for sale in 1989 after proving extremely resistant to Dutch elm disease following injection with unnaturally high doses of the pathogen, Ophiostoma novo-ulmi.[1][2] However, propagated by grafting onto wych elm rootstocks, graft failure owing to incompatibility has become a common occurrence in the Netherlands.
- ^ Heybroek, H.M. (1993). "The Dutch Elm Breeding Program". In Sticklen, Mariam B.; Sherald, James L. (eds.). Dutch Elm Disease Research. New York, USA: Springer-Verlag. pp. 16–25. ISBN 978-1-4615-6874-2. Retrieved 26 October 2017.
- ^ Tijdgat, M. (2020). Ulmus– Gebruikswaarde- en sortimentsonderzoek in de praktijk. (Ulmus– Use, value, and range research in practice. ) Dendroflora Nr. 56-2020, p. 98-99 [1]