Submitted to: Crop Science
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: July 31, 1997
Publication Date: N/A
Interpretive Summary: Corn planted in fields with large populations of root-knot nematodes yields less. Yields of subsequent crops such as cotton or soybean planted in these fields are also reduced. Therefore, growing corn hybrids that have resistance to root-knot nematode not only provides a means of reducing yield losses in corn, but also a way to reduce the nematode populations that survive to infect subsequent crops. Four corn germplasm lines with resistance to southern and peanut root-knot nematode were developed by selecting for reduced egg mass production in the greenhouse. The four lines, Mp709, Mp710, Mp711, and Mp712, which exhibit extremely high levels of resistance, were released by USDA-ARS and the Mississippi Agricultural and Forestry Experiment Station in June. Plant breeders can now transfer the resistance in these lines to high yielding hybrids available commercially to farmers.
Technical Abstract: Four germplasm lines of corn (Zea mays L.), Mp709, Mp710, Mp711, and Mp712, were released as sources of resistance to southern root-knot nematode [Meloidogyne incognita (Kofoid & White) Chitwood] and peanut root- nematode [M. arenaria (Neal) Chitwood]. The lines were selected in the greenhouse for reduced egg mass production and are nearly immune to both southern and peanut root-knot nematode production.