Abstract
In Hungary, black locust (Robinia pseudoacacia L.) is considered as an important exotic stand-forming tree species growing mostly under unfavourable ecological conditions for forest management. Due to climate change effects, its importance is increasing in many other countries, too. As a result of a selection programme, new black locust clones were tested in clone trials. Juvenile growth of 12 micropropagated black locust clones in two plots series established at different dates were evaluated in central Hungary under marginal site conditions. At age of 7 the clone R. p. ‘Bácska’ (‘KH 56A2/5’), at age of 10 the clones R.p. ‘Homoki’ (‘MB17D3/4’) and ‘PV201E2/4’ appeared to be especially promising for mass production. Based on the data obtained from the performed trials, it can also be concluded that tissue culture can be considered as a suitable tool for propagating superior individuals and offers new prospects for the rapid cloning of selected genotypes used for plantation forestry.
Highlights
Black locust (Robinia pseudoacacia L.) was introduced to Europe from its natural range in southeastern United States more than 300 years ago
Study site Data used in this study came from two black locust clone trails established at different dates in the forest subcompartment Kecskemét 16CS/1 (N46°54’44”, E19°41’51”) in Central-Hungary between the Danube and Tisza rivers (Figure 1)
We used arithmetic mean in case of tree height dbh because it is more appropriate for certain types of experimental studies, for example, clone trials where it is primarily important to measure the responses of trees to the experimental treatments during the first years after plantation establishment
Summary
In Hungary, black locust (Robinia pseudoacacia L.) is considered as an important exotic stand-forming tree species growing mostly under unfavourable ecological conditions for forest management. Due to climate change effects, its importance is increasing in many other countries, too. As a result of a selection programme, new black locust clones were tested in clone trials. Juvenile growth of 12 micropropagated black locust clones in two plots series established at different dates were evaluated in central Hungary under marginal site conditions. ‘Bácska’ (‘KH 56A2/5’), at age of 10 the clones R.p. Based on the data obtained from the performed trials, it can be concluded that tissue culture can be considered as a suitable tool for propagating superior individuals and offers new prospects for the rapid cloning of selected genotypes used for plantation forestry
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