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