Abstract
The objective of the investigation was testing of sunflower hybrids in different environmental conditions. Trials were set up at three locations (Osijek —Eastern Slavonia county, Karanac — Baranja county, and Fericanci — Western Slavonia county) during the 2002 and 2003 growing season. Fourteen sunflower hybrids were tested. Stability and adaptability analysis was performed using two parameters — regression coefficient (b i ) and deviations mean square (s 2 di ). Determined were hybrids characterized by high and stable grain yield and wide general adaptability and hybrids for low and high yielding environments. The investigation showed no significant differences among single cross and three-way cross hybrids regarding grain yield stability.
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