Two commercial Egyptian cotton cultivars used in this study namely ; Giza 70 and Giza 75. Seed cotton samples of the studied cultivars were taken from 13 locations in Egypt, during the two successive seasons 1995 and 1996. 50 bolls of seed cotton of each replicate were picked, every loculi of each boll was divided to three parts i.e., top, middle and base to study germination percentage, lint cotton %, seed index, fiber length parameters, micronaire reading and fiber colour. The base site gave the highest values of germination percentage, lint percentage, seed index, micronaire reading and degree of reflectance (Rd %). Whereas, the middle site recorded the highest the 2.5 % and 50 % span lengths. The top site recorded the second or third order of the all characters under study. The results indicated that micronaire reading showed highly significant positive correlation with germination percentage, lint percentage and Rd %, and it showed significant positive correlation with seed index.