DIGITALNA ARHIVA ŠUMARSKOG LISTA
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ŠUMARSKI LIST 1-3/1978 str. 26     <-- 26 -->        PDF

jednogodišnjih izbojaka, boja rukavca iglica i dužina iglica) hibridi nisu intermedin
arni.
U anatomskoj građi iglica intermedijarnost je izražena kod hibrida jedino
u međusobnom položaju žila.


LITERATURA


1.
Fowler , D. P. (1964): Hard pine breeding at the Southern Research Station,
Maple, Ontario, 1962 and 1963. Proceedings of the ninth meeting of the Comittee
on forest tree breeding in Canada; Part II, 33—37.
2.
Heimburger, C. C. and Fowler, E. J. (1969): Precocious Flowering in
Some Pines of the Lariciones Group; Silvae Genetica, 18, 146—150.
3.
Seh r einer , E. J. (1949): Creating better trees; For. Leaves, 34, 3—4.
4.
Vi da ko vić, M. (1958): Investigations on the intermediate type between the
Austrian and the Scots pine; Silvae Genet. 7, 12—18.
5.
Wright, J. W. and Gabriel, W. J. (1958): Species hybridization in the hard
pines, series sylvestres; Silvae Genetica 7, 109—115.
6.
Wright , J. W. (1962): Genetics of Forest Tree Improvement; FAO, Rome, 399p.
SUMMARY


SOME MORPHOLOGICAL CHARACTERISTICS OF HYBRIDS BETWEEN
JAPANESE RED PINE (PINUS DENSIFLORA SIEB. ET ZUCC.) AND
SCOTS PINE (PINUS SYLVESTRIS L.)


On a clone (VI16) of Japanese Red Pine a controlled hybridisation with pollen
from a tree of Scots Pine was performed in 1965. From this crossing combination
three plants were raised in 1967. At their age of 7 years several morphological
characteristics and the anatomical structure of the needles were observed,
with the aim to establish in which characters the hybrids differ from their
parents.


The hybrid plants blossomed already in the third year. At the age of 7 years
they bore 2—3 cones in the whorl, while the Scots Pine had not yet blossomed
at that age. The parent clone of Japanese Red Pine bore on an average a greater
number of cones in the whorl.


The hybrid character of the raised plants is best manifested by the structure
of the cones, by the insertion angle, the length of the cone stalk and the colour
of one-year-old shoots. With regard to the angle of insertion of the cones and the
length of the cone stalks the hybrids are intermediate, while with respect to the
colour of one-year shoots they resemble Scots Pine to a greater extent.


Cone apophyses of hybrid plants possess strongly marked umbos, and in this
regard they resemble Japanese Red Pine. The prickles on the appophyses in
hybrid plants are strongly marked only in the upper half of the cone, while in
Japanese Red Pine sharp prickles are distributed all over the cone. The cone of
Scots Pine bears no prickles on the apophyses.


As regards the length of the needles and the length of the basal sheath on
the needles the hybrids resemble Scots Pine more than Japanese Red Pine.


As to the anatomical structure of the needles there exist differences in the
mutual position of the vascular bundles in the pericycle. In Scots Pine the vascular
bundles are more strongly placed apart than in Japanese Red Pine, while
the hybrids display an intermediacy in this respects.


Primljeno 8. IX 1977.
(Katedra za šumarsku genetiku
i dendrologiju Šumarskog fakulteta
Sveučilišta u Zagrebu,
Šimunska cesta br. 25)