Gene effects and combining abilities for oil content in sunflower

Abstract

Considering the worldwide importance of sunflower oil, objective of this study was to evaluate gene effects and combining abilities of six sunflower open pollinated varieties. Varieties were crossed according to incomplete diallel method and produced fifteen F1 progenies. Comparing the mean values of F1 progenies to parents mean in most cases superdominance was expressed as a mode of inheritance. Nonetheless, dominance of better parent and partial dominance of better parent were also recorded as a mode of inheritance. GCA/SCA ratio indicated greater importance of non-additive genetic component in oil content expression. The genetic variance analysis showed that dominant component was more important and dominant genes prevailed compared to recessive genes for oil content in sunflower.

S obzirom na svetski značaj suncokretovog ulja, cilj ovog istraživanja je bio da se procene efekti gena i kombinacione sposobnosti šest sorti suncokreta. Sorte su ukrštene metodom nepotpunog dialela i proizvedeno je petnaest F1 potomstava. Poredeći srednje vrednosti F1 potomstava sa srednjim vrednostima roditelja u većini slučajeva kao način nasleđivanja ispoljila se superdominacija. Pored toga, dominacija boljeg roditelja i parcijalna dominacija boljeg roditelja su takođe zabeležene kao način nasleđivanja. OKS/PKS odnos je ukazao na veći značaj neaditivne genetičke komponente u ekspresiji sadržaja ulja. Analiza genetičke varijanse je pokazala da je dominantna komponenta bila važnija i dominantni geni su preovlađivali u odnosu na recesivne za sadržaj ulja kod suncokreta.