Abstract
Powdery mildew caused by Erysiphe polygoni DC causes severe reductions in the green pod yield of pea (Pisum sativum L). The objective of this study was to reveal the genetics of powdery mildew resistance in six Resistant × Susceptible crosses and their generations (F1, F2, BCs, and BCr) against three isolates of E. polygoni. Cautious selection of the parental material and evaluation of 873 individual F2 plants from six crosses gave a perfect 3 susceptible:1 resistant segregation and 1 resistant:1 susceptible in BCr. These results led to the conclusion that resistance was conferred by the single recessive gene (er).
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