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IAC 60 Centenário and IAC 162 Tuiuiú: wheat cultivars for upland and irrigated conditions in the State of São Paulo, Brazil

In trials carried out in upland condition at the Paranapanema Valley, and under sprinkler irrigation at the North Region State of São Paulo, Brazil, the wheat cultivars IAC 60 Centenário and IAC 162 Tuiuiú originated from artificial crosses and selected by the pedigree method, were evaluated in relation to grain yield and reactions to the causal agents of leaf rust, blast, and leaf spot. Under greenhouse conditions, both cultivars were evaluated to the causal agent of the stem rust. Their industrial bread qualities were also assessed. In upland condition, using highly acid soils, the grain yield of the new cultivars did not differ from the cultivars BH 1146 and IAC 24. However, in upland conditions, but using soils with low acidity, there was no significant difference as compared to the control Anahuac. Under irrigation the cultivar IAC 60 and IAC 162 showed high grain yield, differing significantly of the controls BH 1146 and IAC 24. Considering the two regions, the cultivar IAC 60 showed moderate susceptibility to leaf spot, leaf rust and blast, while the cultivar IAC 162 exhibited resistance to leaf rust and blast, but susceptibility to leaf spot. Concerning their response to toxic aluminium, the cultivar IAC 60 was tolerant while IAC 162 showed moderate susceptibility. Both cultivars were moderately susceptible to iron toxicity and tolerant to manganese toxicity when they were tested in nutrient solutions with these elements. Considering bread characteristics trials, the new cultivars presented superior values in relation to the breads made with commercial flour. 'IAC 162' showed superior specific volume in comparison with 'IAC 60', but inferior in relation to intern (crumb) and extern (crust) characteristics.

wheat crop; upland condition; sprinkler irrigation condition; grain yield; disease resistance; bread characteristics


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