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Agronomic evaluation of soybean (Glycine max (L.) Merr.) recombinant inbred lines segregating for resistance to southern root-knot nematode (Meloidogyne incognita).
D. WRIGHT (1), J. Anderson (1), M. Reyes-Valdes (2), J. Bond (1), S. K. Kantartzi (1). (1) Southern Illinois University, Carbondale, IL, U.S.A.; (2) Universidad Autónoma Agraria Antonio Narro, Saltillo, Mexico

One of the most economically important pathogens of US soybeans is the Southern Root Knot Nematode [(<i>Meloidogyne incognita</i>) (Kofoid and White) Chitwood] (Mi). Economically and environmentally sustainable control methods for this pathogen are limited to resistant varieties and non-host rotation. Evaluation and identifying resistance is highly important for plant breeding programs. The main objective of the present study was to screen within the greenhouse two F<sub>5:7</sub> recombinant inbred line (RIL) (<i>n</i>=96) from crosses between ‘LS90-1920’ or ‘LS97-1610’ (resistant parents) with ‘Spencer’ (susceptible parent) to identify sources of resistance for Mi. Additionally, the RILs were evaluated in two environments in southern Illinois (Harrisburg and Dowell) in 2011 for several agronomic characteristics including yield performance. Descriptive statistics, genotype x environment interaction, and broad-sense heritability were used to identify any major resistance genes. Additionally, correlation coefficients between Mi resistance and important agronomic traits such as lodging, pubescence, growth habit, plant height and yield were estimated. The results will be used for constructing mapping populations and accelerating selection practices. <p><p>Keywords: Nematode, Legumes, Beans

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