ISHS Acta Horticulturae 224: Fruit Breeding
BREDING OF ROOTSTOCKS "J-TE" AND THEIR INFLUENCE ON GROWTH AND PRODUCTIVITY OF DIFFERENT CULTIVARS |
| Author: | A. Dvorák |
| Abstract:
The breeding of clonal rootstocks for apples was started in 1957 at the breeding station Techobuzice. The first stage of hybridization was from 1957 until 1959. From these crossings came all the acceptable "J-TE" rootstocks. The breeding program continued until the year 1965. The original aim of the program was to get virus-free rootstocks. Later on we tried to select rootstocks, looking for better properties as rootstocks, as well as better nursery and fruiting qualities. We succesfully obtained virus-free new rootstocks and were able to keep them virus-free in cooperation with the virologists and by replanting them regularly in naturally isolated sites. Within the group of dwarfing rootstocks, with M 9 as the standard, the hybrid clone J-TE-E was the best. Notwithstanding the other good properties, it is easier to propagate than M 9. The clone J-TE-H is very interesting, as it grows well in the first years after planting, but comes early to its maximum size and then stops development at about the size of trees on rootstocks M 9. For very dense orchards the clone J-TE-G is good for its high specific productivity and excellent propagation potential. J-TE-F is of interest for its high productivity, but is not easily propagated. | |
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