Performance and stability analysis of several yellow maize hybrids

الملخص EN

Performance and stability of 13 maize single cross hybrids were estimated under five different environments in Egypt during 2013 summer season.

A randomized complete block design was used at each environment.

Mean squares due to environments, Genotypes and G x E interaction were highly significant for grain yield and other agronomic traits.

Based on combined data H2 possessed the highest grain yield (5.15 kg/plot) and significantly outyielded the check hybrid H13 (4.59 kg/plot).

According to stability analysis the G x E (linear) interaction was not significant and had low portion of the G x E interaction when compared to the environment linear mean of squares for grain yield and the other studied.

If the mean yield ( ), regression coefficient value (bi) and the deviation from the regression are considered together, then the most stable hybrid would be H2 and H9.

The most stable hybrids according to the ecovalence method were H10, H8, H1, H9.

These hybrids were not the best ranked for grain yield, except H9, which possessed the first rank for grain yield with 5.15 kg plote-1 (Plot size is 9.6 m2) and is considered as a promising hybrid for stability.