Fars is the pioneer Province in Iran from maize production point of view. Because of the importance of foreign hybrids in either direct release or use as new germplasm in breeding programs, 17 foreign maize hybrids, were compared with 3 local hybrids in a randomized complete block design of four replications, in Zarghan (temperate zone and as first cropping), and Darab (warm region and as second cropp after wheat) in 2003. Traits were evaluated and data collected during the growing season following which combined analysis was made. Results indicated that hybrids were different in plant height, ear height, row number, as well as kernel number per row, kernel depth, 1000 kernel weight, cob percent, as well as grain yield. Some foreign hybrids yielded more than local ones but this difference was not significant. Hybrids no. 1, 2, and 15 (OSSK 713, OSSK 602 and SP1042) respectively yielded higher than the others. Hybrids were infected with maize rough dwarf virus to an extent of 33 to 82 percent in Zarghan but not in Darab location. SP1042 hybrid (NO. 15) was the least susceptible to maize rough dwarf. Independent comparisons indicated a significant difference between local and foreign hybrids as to row number, kernel number, kernel depth and 1000 kernel weight but yield did not differ at %5 level of probability. The highest correlation as to grain yield was observed with kernel depth, 1000 kernel weight as well as with kernel number in row.
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