Environmental influence was evaluated in 20 wheat genotypes in relation to grain yield and quality, adaptability and disease reaction in regions where irrigation is necessary for good agronomical performance. The experiments were carried out at Tatuí, Votuporanga, Ribeirão Preto, and Mococa in the State of São Paulo, Brazil, during 1995-98. Genotypes were also evaluated for tolerance to aluminum toxicity in nutrient solutions and for industrial quality for bread production. The genotypes IAC 351, IAC 335, IAC 289 and Mochis presented high grain yield in Tatuí; IAC 289, TUI"S" and SERI*3/BUC in Votuporanga; and IAC 370 in Ribeirão Preto and Mococa. Under the ideal genotype concept the IAC 370 showed high grain yield capacity, was responsive to the environment improvement and sensitive to the unfavorable environment conditions. Among the diseases, leaf rust presented general occurrence, showing higher incidence in Tatuí. Anahuac, IAC 287, CAL/CHKW//VEE"S" and IAC 370 were the most susceptible to powdery mildew. The genotypes Anahuac, IAC 287, JCAM//EMU"S"/YACO"S", PFAU and IAC 339 were the most sensitive to aluminum toxicity. Anahuac, IAC 24, IAC 287, IAC 289, IAC 334, PFAU, TUI"S", IAC 339, IAC 370 and IAC 351 exhibited flour characteristics with good potential for bread production.
wheat; grain yield; diseases; aluminum tolerance; high adaptation; flour technological characteristics
