DIGITALNA ARHIVA ŠUMARSKOG LISTA
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| ŠUMARSKI LIST 1-2/1967 str. 39 <-- 39 --> PDF |
BREEDING OF LARCH III Summary Early in 1957 we commenced with the breeding oE Larch. We carried out an artificial pollination of Larch and obtained several combinations of intra-and interspecific hybrids. In works 13 and 14 are given the results of measurement of the mentioned one and three-year-old plants. Now we present the result concerging the height and diameter growth of the same plants now 7 or 8 years of age. The conclusions are as follows: 1. Two families of hybrids between European and Japanese Larch, i.e. Si and Sio produce after the 7th and 8th growing periods the best height and diameter accretion showing also a phenomenon of heterosis. 2. With respect to the height and diameter growth rate after the hybrids L. eurolepis Si and Sio there follow three families of the pure Si, Ss and So European Larch. 3. The hybrid S4 between Siberian and Japanese Larch grows better in height and diameter than the hybrids S2 and Sr. between the European and Siberian Larch. 4. The coefficient of variability in all combinations of crossing is usually greater for the diameters of plants than for their heights. 5. In most families there exists a very close correlation after the 7th and 8th growing seasons between height and diameter of plants. |