![]() magna) 4x, as a donor parent, in a successive backcrossing scheme with the high-yielding Brazilian cultivar IAC OL 4. Methods: To overcome the known compatibility barriers for the use of wild species in peanut breeding programs, we used an induced allotetraploid ( Arachis stenosperma × A. Only partial resistance to fungal diseases has been found in cultivated peanut, but high resistances have been described on the secondary gene pool. ![]() Late leaf spot is the most frequent disease and a major problem of the crop in Brazil and many other tropical countries. Introduction: Fungal foliar diseases can severely affect the productivity of the peanut crop worldwide.
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