Selekcija i Semenarstvo (Jan 2004)
Combining abilitys for yield components in sunflower
Abstract
In order to develop new single-cross sunflower hybrids with an altered plant model and a high genetic potential for seed yield and oil content, it is essential to study the combining abilitys of the inbred lines. Full diallel crosses with six genetically divergent sunflower inbreds were carried out in order to study the mode of inheritance and combining ability for plant height and head diameter in the F1 and F2 generations. Significant differences in the mean values for the traits concerned were observed. The most common mode of inheritance of plant height in the F1 and F2 generations was superdominance, and there were also instances of partial dominance and dominance. The mode of inheritance of head diameter in the F1 and F2 generations was dominance and superdominance. Highly significant GCA and SCA value, for plant height and head diameter were recorded. We found a line (NS-NDF) with negative GCA value that was also a good general combiner for reduced plant height and head diameter. .
