Zbornik - Društvo genetičara Srbije
Zbornik - Društvo genetičara Srbije
Zbornik - Društvo genetičara Srbije
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IV-Pos-20 ZBORNIK ABSTRAKATA III KONGRESA GENETIÈARA SRBIJE 137<br />
Subotica, 30. novembar - 4. decembar 2004.<br />
OCENA KOMPONENATA VARIJANSE MASE 1000 SEMENA KOD<br />
SUNCOKRETA (Helianthus annuus L.)<br />
R. Marinkoviæ<br />
Nauèni institut za ratarstvo i povrtarstvo, Novi Sad<br />
Kod deset F1 hibrida nastalih ukrštanjem izmeðu pet inbred linija suncokreta po dialelnoj<br />
šemi analiziran je uticaj gena sa aditivnim i dominantnim efektima kao i njihovih<br />
interakcija u nasleðivanju mase 1000 semena. Povezanost izmeðu oèekivanih srednjih<br />
vrednosti potomstava proverena je primenom metode scaling testova (Mather, 1949), a<br />
procena genskih efekata i naèin naslepivanja uraðeni su po metodi Generation Mean<br />
Analysis (Mather i Jinks, 1982). Aditivno-dominantan model nije bio adekvatan kod svih<br />
ukrštanja u obe godine ispitivanja. Bio je adekvatan kod ukrštanja C1,C2,C3iC5, u prvoj<br />
i kod ukrštanja C3,C8,C9iC10 u drugoj godini ispitivanja. Pored glavnih genskih<br />
efekata, aditivan i dominantan, u nasleðivanju ovog svojstva veliki znaèaj imali su i<br />
epistatièni genski efekti. Duplikatni tip epistatze izmeðu dominantnih gena sa negativnim<br />
predznakom naðen je kod ukrštanja C1,C4,C5,C6iC8u prvoj godini i kod ukrštanja C4, C9 iC10udrugoj godini ispitivanja. Komplementarna epistaza izmeðu dominantnih gena<br />
sa negativnim predznakom napena je kod ukrštanja C10 u prvoj, a duplikatna epistaza<br />
izmeðu dominantnih gena sa pozitivnim predznakom je naðena u ukrštanju C5 u drugoj<br />
godini ispitivanja.<br />
ASSESSMENT OF COMPONENTS OF GENETIC VARIANCE OF MASS 1000<br />
SEEDS IN SUNFLOWER (Helianthus annuus L.)<br />
Seven F1 hybrids obtained by crossing five sunflower inbred lines were used to analyze<br />
the impact of genes with additive and dominant effects and their interactions on the inheritance<br />
of mass 1000 seeds. The linkage among the expected progeny means was tested<br />
using the scaling tests method (Mather, 1949), while the estimates of gene effects and<br />
mode of inheritance were made by Generation Mean Analysis (Mather i Jinks, 1982).<br />
The additive-dominant model was not proved adequate in all crosses in both year investigation.<br />
It was adequate in crosses C1,C2,C3and C5 in first and in crosses C3,C8,C9and C10 in second year investigation. Besides the main gene effects (additive and dominant),<br />
epistatic gene effects were also of great importance in the inheritance of this trait. Duplicate<br />
epistasis between dominant decreasers was found in C1,C4,C5,C6 and C8 in first<br />
year and in crosses C4,C9and C10 in second year investigation. Complementary epistasis<br />
between dominant decreasers was found in cross C10 in first, and duplicate epistasis between<br />
dominant increasers in cross C5 in second year investigation.