RESEARCHES ON THE RESITANCE TO FUSARIUM OXYSPORUM F. SP. DIANTHI IN CARNATION

Trials have been undertaken in order to discover in carnation with sexual reproduction some resistances to Fusarium equivalent to which are known previously in certain sorts of carnations with asexual propagation, like Heidi.
Characters of resistance are in botanical species: D. armeria L., D. tenuifolius Schur and D. critinus Sm., and also in horticultural species: D. deltoides L. (var.
Muleta), D. plumarius L. (var.
Mignardise) and D. caryophyllus L. (var.
Marguerite). Only the resistance of horticultural species has been studied.
It is a polygenic type and open to improvement by selection or cross between resistant parents, specially Heidi x Mignardise, some products of which may be used as "miniature" varieties.
To plan the improvement of american carnations by interspecific cross with these resistant parents is possible.
But on account of foreseeable difficulties to preserve the floral characteristics of these varieties we have also tried to induce resistance characters by exposing american carnations to the rays of ⁶⁰Co.
Results obtained before are an encouragement to continue in this way.

Symposium on Carnations

A. Silvy, P. Péreau-Leroy

https://doi.org/10.17660/ActaHortic.1977.71.23