INDUSTRIAL QUALITY AND RESISTANCE TO SPOT BLOTCH AND SCAB IN TRITICALE, WHEAT AND RYE

In the south of Brazil, where climatic conditions are unfavorable for small grain cultivation, triticale is considered as an alternative cro p. Microsedimentation (MS) test using sodium dodecyl sulphate, Hagberg falling numbers (FN) and resistance to scab (Fusarium graminearum) an d to spot blotch (Bipolaris sorokiniana) were evaluated in nineteen tr iticale genotypes, three wheat cultivars, and one rye cultivar, in fou r sowing dates, in 1989, in Passo Fundo, RS, Brazil. Resistance to sca b and spot blotch was highest in rye BR-1. Following rye, the tritical e genotypes, TCEP 887, IALPAR 23-Arapoti, IAPAR 38-Arauna, CEP 22-Botu carai, PFT 8913, CEP 25, PFT 8812, TCEP 852, PFT 8613 ''S'', PFT 882 e PFT 881 1, showed a good resistance to spot blotch, whereas PFT 8812, PFT 8913, CEP 25, PFT 882 and Triticale BR-2 had better resistance to scab. The three wheat cultivars presented the highest FN and MS value s, rye had intermediate values and the triticale genotypes where consi dered unsatisfactory. In average, later sowing contributed to increase grain quality.