Three sheep chromosome regions (OAR1, OAR5 and OAR25) were selected to study quantitative trait loci (QTL) segregating for wool traits in Baluchi sheep, an indigenous sheep breed in Iran. A total of 503 progeny from 13 half-sib families were genotyped for 15 microsatellite markers. The data were collected from Research Centre on Baluchi breed from 2009-2010. Wool traits were corrected for fixed effects of birth-year, sex, herd, and litter size. The average number of progeny per sire was 38 and ranged between 16 and 59. The QTL analyses were performed using regression-based interval mapping. The results revealed 7 QTL on OAR1 for type fiber traits (hetero-type, kemp and true wool percent in fleece), coefficient of variation of fiber diameter, greasy and clean fleece weight and staple length, 2 QTL on OAR5 for hetero-type wool percent and clean fleece, and 6 QTL on OAR25 for type wool traits, greasy and clean fleece weight and coefficient of variation of average fiber diameter.

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