Cytoplasmic and combining ability on fiber quality traits in intera and interspesific crosses of tetraploid cotton (G. hirsutum x G. barbadense).

摘要

The sixteen cross combinations were produced by a complete diallel-mating system with four varieties of tetraploid cottons (Sahel and Sepid of G. hirsutum, Barbadense5539 and Termeze14 of G. barbadense). The results showed that the G. barbadense species had high GCA for fiber length, uniformity, strength and seed index. The GCA: SCA ratios for the lint index, uniformity, strength, elasticity, fitness and seed index were higher than one indicating the presence of additive genetic effects for most of the studied characteristics except for fiber length (2.5%). Positive heterosis values were observed in intraspecific crosses for lint index and fitness. Also, negative hetrosis values obtained in interspesific crosses for lint index and fiber fitness. Hetrosis values were positive in all of combinations for fiber length and strength.