Yield stability of maize germoplasm evaluated in several regions of Brazil

The objective of this work was the obtention of information on the response pattern of 30 maize genotypes in 14 environments of Brazil in 1995/96. The stability parameters of ear yield were estimated. All the genotypes varied for yield adaptability. The three-way cross P 3041 presented the best yiel d and showed tow stability to a deterioration on environmental variations. The open pollinated materials CMS 50 and BR 106 were, respectively, the fir st and fifth best yieldings among all the studied maize genotypes, with low adaptation on unfavorable environments. The identification of promising ma ize genotype was possible for immediate utilization and as a source of germ plasm in breeding programs.