This investigation had the objective to evaluate grain yield adaptability and stability of 17 wheat cultivars (Triticum aestivum L.) for Paraná State, Brazil, occording to four different methods. The experiments were carried out in 2007, at different locations of Paraná, in complete randomized blocks experimental design, with 4 replicates. The Wricke (1965) methodology indicates stable cultivars, independently of average yield. Eberhart and Russell (1966) and Cruz et al. (1989) methodologies were equally efficient to evaluate stability and indicate cultivars that are stable and also adapted to favorable and unfavorable environments. Lin and Binns (1988) methodology showed to be of easy interpretation and was efficient to indicate cultivars of high yield and with good stability, where more responsive materials showed a lesser Pi, and high negative correlation of Spearman between grain yields. It was concluded that LIN and BINNS methodology is very specific and when associated to Wi offers more assurance in recommending cultivars for high stability.
Triticum aestivum L; grain yield; adaptability and stability; genotype x environment interaction
