Resistance to Ditylenchus africanus present in peanut breeding lines |
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| Authors: | Steenkamp Sonia Mc Donald Alexander H de Waele Dirk |
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| Affiliation: | Agricultural Research Council, Grain Crops Institute, Private Bag X1251, 2520 Potchefstroom, South Africa. School of Environmental Sciences and Development, North-West University, Private Bag X6001, 2520 Potchefstroom, South Africa. Laboratory of Tropical Crop Improvement, Department of Biosystems, Faculty of Bioscience Engineering, Catholic University of Leuven (K.U.Leuven), Kasteelpark Arenberg 13, 3001 Leuven, Belgium. |
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| Abstract: | Peanut is an important cash crop both for commercial and small-scale farmers in South Africa. The effect of Ditylenchus africanus on peanut is mainly qualitative, leading to downgrading of consignments. This nematode is difficult to control because of its high reproductive and damage potential. The objective of this study was to identify peanut genotypes with resistance to D. africanus that would also be sustainable under field conditions. Selected peanut genotypes were evaluated against D. africanus in microplot and field trials. The inbred lines PC254K1 and CG7 were confirmed to be resistant to D. africanus. The resistance expressed by these two genotypes was sustainable under field conditions. The breeding line PC287K5 maintained low nematode numbers in some trials, but its level of resistance was not as strong or as sustainable as that of PC254K1 or CG7. However, PC287K5 could still play an important role in the peanut industry where lower D. africanus populations occur. |
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| Keywords: | Arachis hypogaea Ditylenchus africanus management peanut peanut pod nematode resistance |
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