Author/Authors :
al-khafaji, hamzah mohsin kadhim al-qasim green university - college of agriculture, Babylon, Iraq
Abstract :
In the spring season (2014), six inbreds of sunflower (C, Q, F, I, E and A) were introduced in fulldiallel cross to obtain 15 single hybrids and 15 reciprocal hybrids. The seeds of genotypes (parents andsingle and reciprocal hybrids) were cultivated in a control experiment using the Randomized CompleteBlock Design (RCBD), with three replicates in the fields of a farmer in Al-Kifl district, south ofBabylon province during the autumn season (2014). The data were taken for the traits of a number ofseeds in the disc, the weight of 100 seeds, the seed yield of the plant, the percentage of oil in the seedsand the oil yield in the plant in order to study the additive and dominance genetic variance and averagedegree of dominance and the percentage of heritability in the broad and narrow sense. The average ofsquare genotypes (parents and diallel and reciprocal crosses) were significant at a probability of 1% forall studied traits. Theandratios were less than one for all traits. The average degree ofdominance for diallel hybrids (ā) and the reciprocal hybrids (ā˗r) was greater than one in all studiedtraits. The values of broad-sense heritability were high for all traits, while its value in the narrow senseis high in reciprocal hybrids for the trait of the weight of 100 seeds and medium in their reciprocalhybrids, and low in diallel hybrids and medium in reciprocal hybrids for the number of seeds in the discand the percentage of oil. As for the rest of the traits were low in its diallel and reciprocal hybrids.
