Abstract
The main goals of sunflower breeding in Yugoslavia and abroad are increased seed yield and oil content per unit area and increased resistance to diseases, insects and stress conditions via an optimization of plant architecture. In order to determine the mode of inheritance, gene effects and correlations of total leaf number per plant, total leaf area and plant height, six genetically divergent inbred lines of sunflower were subjected to half diallel crosses. Significant differences in mean values of all the traits were found in the F1 and F2 generations. Additive gene effects were more important in the inheritance of total leaf number per plant and plant height, while in the case of total leaf area per plant the nonadditive ones were more important looking at all the combinations in the F1 and F2 generations. The average degree of dominance (Hi/D)1/2 was lower than one for total leaf number per plant and plant height, so the mode of inheritance was partial dominance, while with total leaf area the value was higher than one, indicating super dominance as the mode of inheritance. Significant positive correlation was found: between total leaf area per plant and total leaf number per plant (0.285*) and plant height (0.278*). The results of the study are of importance for further sunflower breeding work.
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Claims 8
Claim · model-written summary
F1 and F2 generations differed significantly in mean values of all studied traits.
Not reportedTaxon
Verbatim
e0“Significant differences in mean values of all the traits were found in the F1 and F2 generations.”
Claim · model-written summary
Additive gene effects were more important for total leaf number per plant and plant height.
Not reportedTaxon
Verbatim
e0“Additive gene effects were more important in the inheritance of total leaf number per plant and plant height”
Claim · model-written summary
Nonadditive effects were more important for total leaf area per plant.
Not reportedTaxon
Verbatim
e0“while in the case of total leaf area per plant the nonadditive ones were more important looking at all the combinations in the F1 and F2 generations.”
Claim · model-written summary
Total leaf number per plant had partial dominance, with average dominance below one.
Not reportedTaxonDirection
Verbatim
e0“The average degree of dominance (Hi/D)1/2 was lower than one for total leaf number per plant and plant height, so the mode of inheritance was partial dominance”
Claim · model-written summary
Plant height had partial dominance, with average dominance below one.
Not reportedTaxonDirection
Verbatim
e0“The average degree of dominance (Hi/D)1/2 was lower than one for total leaf number per plant and plant height, so the mode of inheritance was partial dominance”
Claim · model-written summary
Total leaf area showed super dominance.
Not reportedTaxonDirection
Verbatim
e0“while with total leaf area the value was higher than one, indicating super dominance as the mode of inheritance.”
Claim · model-written summary
Total leaf area and total leaf number were significantly positively correlated at 0.285*.
- Organ / stage
- total leaf number per plante0
- Outcome
- total leaf area per plante0
- Direction
- positivee0
- Value
- 0.285*e0
Not reportedTaxon
Verbatim
e0“Significant positive correlation was found: between total leaf area per plant and total leaf number per plant (0.285*) and plant height (0.278*).”
Claim · model-written summary
Total leaf area and plant height were significantly positively correlated at 0.278*.
Not reportedTaxon
Verbatim
e0“Significant positive correlation was found: between total leaf area per plant and total leaf number per plant (0.285*) and plant height (0.278*).”