The breeding of apple rootstocks in Estonia
2000
Univer, T. (Estonian Agricultural Univ., Tartu (Estonia). Polli Horticultural Inst.)
The apple rootstock breeding programme was started in 1954. J.Palk selected 87 clone rootstocks and marked them by the letter E(Estonia). 10 clones were released for state economic testing. From these E20, E53, E56 and E75 were selected for production in nurseries. In 1981 and 1983 A. Veidenberg began new crossing series with rootstocks. Further research was conducted with 78 better rooting clones
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