ISHS Acta Horticulturae 732: VIII International Symposium on Canopy, Rootstocks and Environmental Physiology in Orchard Systems
A CASE FOR PROPAGATING UNIQUE CULTIVAR/ROOTSTOCK COMBINATIONS |
| Author: | C.G. Embree |
| Keywords: | catalogue, rootstock, scion, trait transmission |
| Abstract:
Certain rootstocks have important dominant traits such as disease resistance, hardiness and size control which, in themselves, warrant recommending for new plantings. If these or other rootstocks have the potential to transmit additional attributes such as increased fruit size or flower fertility, this would strengthen commercial introduction. Field trials in Nova Scotia and Quebec, Canada, and Wilhelminadorp, Holland, have shown that the Kentville Stock Clone (KSC) 28 is a semi-dwarf rootstock that reduces flower fertility and fruit size. For the cultivar Jonagold, which often grows too large and sets too heavily, KSC 28 could reduce these problems and add to commercial performance. This is an example of the potential for marrying opposing traits. To develop this concept for other rootstocks, a catalogue of these dominant traits and their transmission potential to the scion (TTP) will be required. The objective of this work is to: A) introduce the concept that certain traits transmitted by the rootstock could justify unique propagation, B) identify the TTP for a rootstock, C) encourage scientists and industry workers to contribute to the catalogue of rootstock-dominated cultivar performance. | |
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