ISHS Acta Horticulturae 732: VIII International Symposium on Canopy, Rootstocks and Environmental Physiology in Orchard Systems
NEW APPLE ROOTSTOCK SELECTIONS FROM THE EAST MALLING BREEDING PROGRAMME |
| Authors: | D. Johnson, J.E. Spencer, K. Tobutt, A.D. Webster |
| Keywords: | apple, rootstock, East Malling, dwarfing, yield |
| Abstract:
The breeding and selection of new rootstocks for apples continues at East Malling Research (formerly Horticultural Research International – East Malling). Results of screening trials conducted over the last 15 years, some of which are still in progress, have identified several promising new rootstock clones. Clones AR. 672-1 induced vigour similar to that produced by M.27, but with slightly better fruit size and yield efficiency. Vigour intermediate between that achieved by M.27 and M.9 was induced by AR.486-1, AR.295-6, AR.669-1 and R.59. One new rootstock with vigour very similar to M.9, AR.680-2, showed excellent yield efficiency and induction of large fruit size. Finally, two selections, AR.801-11 and AR.835-11, produced trees with vigour similar to that on M.26 and good yield performance. The cumulative yields, fruit grade outs and yield efficiencies of trees on the various rootstocks are discussed. | |
Download Adobe Acrobat Reader (free software to read PDF files) | |
