This investigation was conducted to evaluate the comparative productive performances and effect of some environmental factors on wool characteristics of Arkharmerino×Ghezel (Ar×Gh) and Arkharmerino×Moghani (Ar×Mo) crossbreed sheep. The mid side fleece samples taken from animals during two years (2007-2008) were analyzed. Each sample was measured for average fiber diameter, fiber diameter variability, staple length, proportion of medullated fiber, proportion of kemp and comfort factor. The comparative values for these fleece characteristics in F3 generation Ar×Gh were 28.78±0.48μm, 36.84±1.16%, 11.94±0.35cm, 7.07±0.93%, 1.02±0.23% and 68.93% respectively; while those traits were 29.79±0.43μm, 41.86±1.16%, 11.96±0.37cm, 8.13±1.06%, 2.71±0.45% and 63.33±3.66% for Ar×Mo respectively. The effects of genotype, sex, birth type, and year of birth were analyzed. Genotype had a significant (P<0.01) effect on average fiber diameter and proportion of kemp, and Ar×Gh crossbreeds had lower diameter with less proportion of kemp. The two differences in fiber characteristics that were attributable to sex were fiber diameter variability and proportion of medullated fiber, and females had higher measure than males for both traits. Statistical analysis showed that crossbreeding with Arkharmerino generally had positive effects on the fleece favored to be used in the hand woven authentic carpet production.

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