We investigated cross-resistance in Pyrenophora teres to five sterol biosynthesis-inhibiting fungicides (SBIs) by calculating genetic correlations in resistances. Two approaches were used in separate experiments to estimate the correlations: In one method, progeny sampled from crosses of P. teres were used to determine among-family genetic correlations; in the other method, replicated isolates campled from different P. teres populations were used to calculate among-isolate genetic correlations [...]
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Tobin L. Peever (1993) studied this question.