Corn cultivars production stability in Sergipe, Brazil
DOI:
https://doi.org/10.1590/S1678-3921.pab1992.v27.3744Keywords:
<i>Zea mays</i>, genotype x environment interaction, genetic differencesAbstract
Sixteen corn cultivars were evaluated in ten different environments of the semi-arid region in Sergipe State, Brazil, from 1985 to 1987, in randomized blocks with three replications. Several variations were observed in the environmental conditions, due mainly to bad and insufficient rain distribution during the experimental period, especially in 1987 when the lowest productions were obtained. Variance joint analysis revealed remarkable differences between cultivars and localities and also showed genetic differences among cultivars as associated good production potential to a high adaptation capacity. BR 5028 and BR 5011 cultivars associated good production potential to a high adaptation capacity. BR 106 and CMS 04C cultivars, of high productions potential, revealed tendency to adapt in favourable environments, while CMS 35 and CMS 47 cultivars, which were precocious, showed tendency to adapt in unfavourable environments. BR 106, CMS 22, CMS 13, BR 5037, CMS 12 and Centralmex cultivars showed unexpected productive behaviour in the mentioned region.
