Abstract
ABSTRACTSoybeans (Glycine max (L.) Merr.) are mainly grown for protein and oil purposes. The objectives of this study were to: 1) evaluate maturity group (MG) IV and V soybean genotypes for traits associated with local adaptability (yield, plant height, and maturity), and 2) determine seed protein and oil concentrations, their correlation with yield, and respective heritabilities. A total of 40 MG IV or V genotypes were evaluated in four Arkansas locations in 2008 and 2009. The results showed that the genotype x year x location effect was significant for all traits studied, except maturity. Protein and oil concentrations were negatively correlated (−0.91) and highly heritable (0.89–0.93 and 0.82–0.83, respectively). Four promising high-yielding genotypes with moderately high to high protein or oil levels were identified: R05-4682 (high protein) and R05-4256 (high oil) in the MG IV test, and R05-1772 (high protein) and R05-71 (high oil) in the MG V test. These genotypes could potentially bring added value to Arkansas farmers’ fields.
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