Å UMARSKI LIST 1-2/1962

LITERATURA
1. Bel Ion, S.: 1954 Winiki dotychczasowych observaciji nad wzrostem mieszanca
modrzewia Larix eurolepis (Larix leptolepisxLarix europaea) na terenie lasöw
doswiadczainych SGGW w Rogowie, Sylwan 98 (4).
2. Dimpf lrneier, R.: 1959 Die Bastardierung in der Gattung Larix, Forstwiss.
Forschungen, Beih. z. Forstw. Centralblatt 12.
3. Edwards, M. V.: 1956 The hybrid Larch x Larix eurolepis Henry, Forestry
29 (1).
4. Go the, H.: 1953 Ein Kreuzungsversuch mit Larix eurcpaea D. C, Herkunft
Schlitz und Larix leptolepis Gord., Z. Forstgenetik 2 (6).
5. Go the, H.: 1956 Ein Kreuzungsversuch mit Larix europaea D. C, Herkunft
Schlitz und Larix leptolepis Gord., Z. Forstgenetik 5 (4).
6. Kiellander, L. C: 1956 Report on the Development of the International
Provenance Test of Larch in Sweden, JUFRO, 12th Congress, Oxford.
7. Kiellander, L. C: 1958 Hybridlärk och lärkhybrider, Svenska Skogsvardsföreningens
Tidskrift 4.
8 Langner, W.: 1951-52 Kreuzungsversuche mit Larix europaea D. C. und Larix
leptolepis Gord., Z. Forstgenetik 1 (1, 2).
9. Langner, W.: 1961 Einige Versuchsergebnisse zum Inzuchtproblem bei der
forstlichen Saatgutgewinnung, JUFRO, 13. Kongress, Wien.
10. L e v e n, J. K.: 1949 Some experiments in cross pollination of European Larch
(L. europaea D. C.) and Japanese Larch (L. leptolepis Murray), Quart. J. Fort.
43 (2).
11. V i d a k o v i ć, M.: 1959 Oplemenjivanje ariša, Šumarski list, 10—11.
A NEW CONTRIBUTION TO THE BREEDING OF LARCH
In 1957 the author carried out artificial pollination of Larch trees. In the paper
(11) are presented the results of measurements of the seedlings-crosses after the first
year of age. Now the author presents the results of measurements of these seedlings
when 3 years old.
In the Table I are shown the combinations of the performed artificial pollination.
The height data referring to the seedlings are given in Tables II, III, IV, and V, as
well as in a histogram. The diameter of the seedlings was measured after the second
and third growing seasons. It was measured close to the ground surface. Data relating
thereto are shown in Tables VI, VTI, VIII, and IX, as well as in a histogram.
On the basis of these results the author came to the following conclusions:
1. Interspecific hybrids — for which an European or Siberian Larch was taken
as the female parent, and a Japanese Larch as the male parent — exhibit a good
rate of height growth while their diameter growth is somewhat inferior.
2. The hybrid Si produced by crossing European Larch No. 12 x Japanese Larch
No. 10 displays the best height growth, evidencing in this connection the phenomenon
of heterotic vigour.
3. For the parent tree of European Larch No. 12 it is supposed that it possesses
the character of good height and diameter growth, this being based on the following
findings:
a) The Fi-generation of this tree obtained by self fertilization possesses a good.
height and diameter growth rate.
b) The cross iSi, for which the parent tree No. 12 was taken as the female parent,
exhibits the best height growth among all other combinations, and as to the diametergrowth
it is better than is in the case of the cross Sio, in which for the female parent
was taken a tree of the European Larch No. 29 (instead of the No. 29), while the male
parent is the same as in the combination Si.
4. It is supposed that the second parent tree of European Larch No. 29 possesses,
a somewhat inferior height growth (and especially as to the diameter growth) than
European Larch No. 12.
5. In the progeny of all combinations the dispersion is smaller round the mean,
diameters then round the mean heights.
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