A field study was carried out to evaluate agronomic performances and fiber qualities of improved cotton varieties under irrigated condition of Sille and Weyto cotton producing area. The experimental design used was Randomized Complete Block Design with three replications. The combined analysis of variance revealed highly significant (p≤0.01) difference among the varieties for all the traits viz. plant height, boll number per plant, boll weight, seed cotton yield, ginning out-turn, lint yield, micronaire, fiber length and fiber strength. There was no significant interaction effect of variety by location or variety by location by years except for plant height, boll number per plant and micronaire. The seed cotton yield varied between 3.03ton/ha and 4.35ton/ha while the lint yield ranges from 1.02ton/ha to1.70ton/ha. Moreover, the data revealed that Deltapine-90, Stam-59A and Carolina Queen cotton varieties showed maximum and statistically equal yield of seed cotton and lint yield with premium range micronaire market value and considerable fiber length and strength. Moreover, Ionia cotton variety generally exhibited superior fiber qualities (3.67 micronaire, 31.12mm fiber length and 31.42g/tex fiber strength) and it seems to be suitable for quality oriented cotton fiber production. However, the development of diverse and more productive varieties possessing acceptable fiber qualities at international market standard and infusion in to production needs to be the priority of cotton research.

Keywords: Cotton variety, ginning out-turn, fiber quality, seed cotton yield