REPORT ON “INTERNATIONAL TRIALS ON PLUM ROOTSTOCKS”

These trials on plum rootstocks were initiated in 1989 at the IV^th Symposium of Plum and Prune Genetics working group, taking place at Bordeaux.

At that time, we decided that the INRA Station "La Grande Ferrade" would be the coordinator of this study.

At the International ISHS Congress in 1990 at Firenze we organized the preparation of these trials:

1. List of rootstocks and varieties.

2. The majority of rootstocks were rooted at INRA Grande Ferrade.

3. Nursery production of trees at the INRA field station "La Tour de Rance" for Prunus domestica (Table fruit variety) and Prunus Salicina.

For the trial with Zwetsche varieties, nursery production was made in each country.
The three following tables give information on countries, varieties and rootstocks studied.

Table 1: International trials on plum rootstocks

Countries:	Netherlands (Wilhelminadorp) – Norway (Lofthus) – Denmark
	(Aarslev) – Belgium (Gembloux and K.U. Leuven) – Spain (Aula
	Dei) – United Kingdom (East Malling) – France (INRA Bordeaux).

Varieties	(European Plums : Table fruit varieties):
	Common variety = Greengage GF 1119
	Other varieties = Opal        :NL NO DK
	Victoria                      :UK
	Bleue de Belgique           :BE
	French Prune                :FR
Rootstocks:	St Julien A                  Jaspi® Fereley
	Ishtara® Ferciana           Plumina® >Ferlenain
	Seedling of P. mariana : P 8–13 (pentaploid)
Planting year:	1993/1994

VI International Symposium on Plum and Prune Genetics, Breeding, Pomology

R. Renaud

https://doi.org/10.17660/ActaHortic.1998.478.14