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Correlation of Resistance in Soybeans to Heterodera glycines and Rotylenchulus reniformis. R. V. Rebois, Research Nematologist, Crops Research Division, ARS, USDA, Auburn, Alabama, Jackson, Tennessee, Current address of senior author: Department of Botany and Plant Pathology, Auburn University, Auburn, Alabama 36830; James M. Epps(2), and Edgar E. Hartwig(3). (2)(3)Research Nematologist and Research Agronomist, respectively, Crops Research Division, ARS, USDA Auburn, Alabama, Jackson, Tennessee, and Stoneville, Mississippi. Phytopathology 60:695-700. Accepted for publication 17 November 1969. DOI: 10.1094/Phyto-60-695.

All Heterodera glycines (soybean cyst nematode) -resistant soybean cultivars tested were also resistant to Rotylenchulus reniformis (reniform nematode). Resistance of Dyer, Custer, and Pickett is derived from Peking. D66-12394, D66-12392 and two F4 cultivars of PI90763 × Hill crosses also carry genes for resistance to both nematodes. Resistant cultivars are attacked by the reniform nematode larvae, but female development is subsequently inhibited. Histological effects of parasitism of female reniform nematodes on Lee soybean closely resembles those reported with the soybean cyst nematode. The histology of susceptible and resistant soybeans to R. reniformis was studied. No relationship was established between R. reniformis and Meloidogyne incognita (root knot nematode) resistance in soybeans. This is the first report in which a crop has been shown to have a common genetic source of resistance to nematodes from different genera. It is also the first report showing the histology of R. reniformis parasitism on soybeans.