Abstract
We aimed to evaluate the possibilities to increase the ginning out-turn in multi-parent hybrid populations of cotton. Two genotypes with high ginning out-turn were crossed with seven F3 populations obtained from double crosses and then created fourteen F1 populations in 2020. The F1 populations, their grandparents and two parents, 23 genotypes, were compared by Randomized Complete Block Design with 3 replications in 2021. Significant differences were detected among genotypes, including crosses and parents for seed cotton yield per plant, ginning out-turn, fiber fineness and fiber strength. The orthogonal contrasts indicated that the average crosses performances were significantly higher than that of parents for ginning out-turn, seed cotton yield per plant and fiber fineness. Standard heterosis was between -11.19% and 20.54% for seed cotton yield per plant; 4.71% and 16.03% for ginning out-turn. [(ST-468 × Claudia) × (Gloria × Carisma)] × Esperya should be transferred to further generations. Multi-parent hybrids could be used to create the required variance and maintain dominance for the improvement of yield and ginning out-turn.
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