ISHS Acta Horticulturae 224: Fruit Breeding
BREEDING PROGRAM FOR PEACH ROOTSTOCKS RESISTANT TO WATERLOGGING |
| Authors: | A. Nicotra, L. Moser |
| Abstract:
Two methods of selection were tested. In the first one, the propagation ability of open pollinated seedlings from 93 different origins was determined by hardwood cutting. Here, the best results were obtained from seedlings that had been originated from rootstocks, among which the best were those of Myrobalans. Among the Japanese types the varieties that gave seedlings with the highest propagation ability were 'Simka', 'Starking Delicious', 'Early Golden' and 'Siemlianica'. The European varieties gave generally poorest results in this respect but 'Vengerka bordovaja', 'Susino II', 'Queenston' and 'Oneida' were relatively the best. Then the plants originated from cuttings of "high propagation ability" seedlings were grafted with peach cultivars and the graft compatibility was tested in a soil with a high clay content. In the second method of selection, seedlings of 75 different origins were grafted at the 1st year to test the graft compatibility. In each seedling a small branch after grafting operation had been also trained together with the peach scion, from which later in the selected individuals the propagation ability by hardwood cutting was tested. The graft compatibility was much higher in the European type plums than in the Japanese types and rootstock progenies. However, no plum population totally compatible with peach has been found. Among the European types, the highest percentage of compatibility was shown by seedlings originated from 'Czar', 'Iroquois' and 'President' /90%/. | |
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