Zbornik - Društvo genetičara Srbije

IV-Usm-20 ZBORNIK ABSTRAKATA III KONGRESA GENETIÈARA SRBIJE 109
Subotica, 30. novembar - 4. decembar 2004.
VARIJABILNOST SVOJSTAVA OILJAVANJA REZNICA
CRNIH TOPOLA U USLOVIMA VODENE KULTURE
B. Kovaèeviæ 1 , V. Guzina 1 , Marija Kraljeviæ-Balaliæ 2 i M. Ivanoviæ 3
1
IRC Institut za topolarstvo i vanšumsko zelenilo, Poljoprivredni fakultet, Novi Sad
2
Poljoprivredni fakultet, Novi Sad
3
Nauèni institut za ratarstvo i povrtarstvo, Novi Sad
Na osnovu trogodišnjih ogleda u polu-kontrolisanim uslovima u vodenoj kulturi (t =
25±2o C i 16/8h reim dan / noæ) sa 13 genotipova amerièke crne topole, 3 genotipa
euramerièke topole i 2 genotipa iz familija u polusrodstvu amerièke crne topole, ispitana
je varijabilnost 45 merenih i izvedenih morfometrijskih, fenoloških i masenih svojstava
oiljavanja reznica. Ogledi su postavljeni u èetiri roka tokom perioda mirovanja: druga
polovina decembra, druga polovina januara, kraj februara i sredina marta. Uticaj genotipa
je bio znaèajan za svojstva korenèiæa u drugom i èetvrtom roku, za svojstva izbojka,
pozicije korenèiæa i fenološke parametre u treæem roku, a za masena svojstva u prva tri
roka. Uticaj godine je bio znaèajan za svojstva korena u drugom i èetvrtom roku, izbojka
u drugom i treæem roku, za fenološka svojstva u svim osim u treæem roku, a za svojstva
mase u èetvrtom roku. Interakcija je znaèajna za veæinu svojstava korenèiæa u prva tri
roka, u èetvrtom za masena i svojstva korenèiæa rane, za parametre izbojka u prvom, a za
fenološka svojstva u treæem roku. Jasne razlike u varijabilnosti ispitivanih svojstava
tokom perioda mirovanja upuæuju na znaèaj roka postavljanja selekcionih testova u
vodenoj kulturi. Heritabilnosti u širem smislu, ispitane na osnovu genotipova amerièke
crne topole, ukazuju na znaèaj drugog i èetvrtog roka. Za potpunu ocenu znaèaja
pojedinih rokova i svojstava u oplemenjivaèkom procesu, neophodno je prouèiti i
njihovu vezu sa preivljavanjem reznica u poljskim uslovima.
VARIABILITY OF CHARACTERS OF CUTTING ROOTING IN BLACK
POPLARS IN THE CONDITIONS OF WATER CULTURE
At the base of three-annual exams in the semi-controled conditions of water culture (t =
25±2oC and 16/8h day/night) with 13 genotypes of Populus deltoides, 3 genotypes of
Populus x euramericana and 2 genotypes from half-sib families of Populus deltoides the
variability of 45 measured and derived morphometric, phenology and dry-mass character
was examined. The experiments were established in four terms during the period of dormancy:
second half of December, second half of January, the end of February and middle
of March. The influence of genotype was considerable for root characters in second and
fourth term, for shoot characters, characters of roots position and phenology in third, and
for mass characters in first three terms. The influence of year on variation was considerable
in second and fourth term for root characters, in second and third term for shoot characters
and in third term for characters of phenology. The influence of genotype x year interaction
for root characters in first three terms, in fourth for the mass and characters of roots on
basal cut, while for shoot characters in first term. Clear differences in influence of examined
sources of variation among examined terms suggest the importance of proper time of
establishment for selection tests in water culture. The heritabilities in broad sense, examined
for genotypes of Populus deltoides, favourise second and fourth term. For complete
evaluation of the significance of terms and characters for their use in breeding process it is
necessary to examine thei relationship with the survival of cuttings in field condtitions.