Yield stability and genotype-environment interaction of some promising yellow maize hybrids [electronic resource].

Includes references.

Phenotypic stability for grain yield and other agronomic traits of eight yellow maize hybrids along with four new check hybrids were estimated by growing these genotypes under five different environmental conditions (Sakha, Gemmeiza, Sids, Nubaria and Mallawy) during 2010 summer season. A randomized complete block design with 4 replications was used at each environment. Genotype-environment interaction (GxE) was highly significant for all studied triats. A large portion of this interaction was accounted by linear regression on the environmental means. The magnitude of non¬linear components was considerably small All hybrids exhibited significant linear response to environmental conditions. Yellow single-cross hybrid SC Gz 136Y, and SC Gz 137Y out yielded the check hybrids SC 162 (32.13 and 31.45 vs 30.85 ard fed⁻¹). However, grain yield of the yellow three-way crosses TWC Gz 138Y and TWC Gz 522Y significantly surpassed the check hybrids TWCC 352 (27.58 and 25.59 vs 24.18 ard fed⁻¹. The mast stable hybrids were SC Gz 136Y, TWC Gz 138Y, and TWC Gz 321 W for grain yield, SC Gz 137Y, SC Gz 13Y for silking date; SC 13, TWC520, TWC522, SC166for plant height; SC G1.135, TWC Gz138, SC Gz162, and SC Gz166 hybrids for ear height. Key word: Zea mays, Maize, Corn, Genotype x environment, and Stability.

Summary in Arabic.

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