DIGITALNA ARHIVA ŠUMARSKOG LISTA
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| ŠUMARSKI LIST 5-6/1971 str. 35 <-- 35 --> PDF |
On the basis of the results obtained the author has reached the following conclusions: 1. Self-fertilizations in autochthonous Lindens of this country is variously successful. The author assumes that in Large-leaved Linden self-fertilization is a rare phenomenon, because he has only succeeded in one case to obtain one plant which owing to low vitality perished. In Small-leaved Linden and Tomentose Linden self-fertilization is probably a more frequent phenomenon. Through controlled hybridization 33—50% plants were obtained in self-pollination. From which it also can be concluded that such a method can be used in improvement works on the mentioned two species. 2. Intraspecific hybridization gave best results in Small-leaved Linden where 7—100% pollinated flowers gave sound fruits which germinated. In the second place is Large-leaved Linden with 4—29% plants. The third place is occupied by Tomentose Linden with 7—16°/o plants. A relatively low percentage of obtained plants out of the total of pollinated flowers in all three species suggests a low fertility of flowers. 3. Interspecific hybridization between all three Lindens is successful with the understanding that the percentage of obtained plants is low. The best results were achieved in crossing Tomentose Linden with Large-leaved Linden. When studying the taxonomic problems of autochthonous Lindens of this country we should also take into account the possibility of their mutual crossing. Chair for Forest Genetics and Dendrology Forestry of Faculty, University of Zagreb |