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Crop Science : Just Published


Accepted, edited articles are published here after author proofing to provide rapid publication and better access to the newest crop science research. Articles are compiled into bimonthly issues at, which includes the complete archive. Citation | Articles posted here are considered published and may be cited by the doi.

Example: Lorenz, A.J., T.J. Gustafson, J.G. Coors, and N. de Leon. 2009. Breeding Maize for a Bioeconomy: A Literature Survey Examining Harvest Index and Stover Yield and Their Relationship to Grain Yield. Crop Sci., doi: 10.2135/cropsci2009.02.0086.

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Current issue: Crop Sci. 55(2)


    • M.J. Morrison, E.R. Cober, J.A. Frégeau-Reid and P. Seguin
      Changes in Lutein and Tocopherol Concentrations in Soybean Cultivars Released Across Seven Decades in the Short-Season Region

      Lutein and α-tocopherol (α-toc) are antioxidant compounds beneficial for human health. Soybean [Glycine max (L). Merr.] contains relatively high concentrations of these compounds, and increasing them through plant breeding may be beneficial to human nutrition as well as provide a marketable seed trait in food-type soybean. Our objective was to determine if there have been changes in lutein and tocopherol concentrations in short-season soybean cultivars. (continued)

      Published: February 3, 2015


    • Luiz Paulo de Carvalho, Francisco José Correia Farias and Josiane Isabela da Silva Rodrigues
      Selection for Increased Fiber Length in Cotton Progenies from Acala and Non-Acala Types

      Cotton (Gossypium hirsutum L. r. latifolium Hutch.) is one of the crops of greatest economic importance in Brazil. The changes in weaving technology, competition with synthetic fibers, and the globalization of cotton and textile production have increased the demand for better quality fibers. (continued)

      Published: February 20, 2015

    • Carolyn M. Fox, Troy R. Cary, Randall L. Nelson and Brian W. Diers
      Confirmation of a Seed Yield QTL in Soybean

      Exotic germplasm can be an important source of genetic diversity for soybean [Glycine max (L.) Merr.] improvement. Previously, four yield quantitative trait loci (QTL) had been identified in a cross between the exotic soybean plant introduction (PI) 68658 and the U.S. cultivar Lawrence. The confirmation of these QTL in other genetic backgrounds will provide further evidence of their usefulness in cultivar development. (continued)

      Published: February 20, 2015

    • Innan Cervantes-Martinez, Pengyin Chen, Moldir Orazaly and Mariola Klepadlo
      Identification of a New Allele at the Rsv3 Locus for Resistance to Soybean Mosaic Virus in PI 61944 Soybean Accession

      Soybean mosaic virus (SMV) is a prevalent pathogen in soybean [Glycine max, (L.) Merr.]. Several SMV resistance genes have been discovered, but most of them do not provide resistance to all strains of SMV. The objective of this research was to identify new genes or alleles displaying differential reactions to SMV strains in the SMV-resistant soybean genotype, PI 61944. Cross combinations were made to develop F2 and F2:3 populations, followed by mapping analyses and greenhouse screenings using G1 and G7 virus strains. (continued)

      Published: February 20, 2015

    • Tadele T. Kumssa, P.S. Baenziger, M.N. Rouse, M. Guttieri, I. Dweikat, G. Brown-Guedira, S. Williamson, R.A. Graybosch, S.N. Wegulo, A.J. Lorenz and J. Poland
      Characterization of Stem Rust Resistance in Wheat Cultivar Gage

      Wheat (Triticum spp.) stem rust, caused by Puccinia graminis f. sp. tritici Eriks. and E. (continued)

      Published: February 3, 2015

    • Keith Rincker, Randall Nelson, James Specht, David Sleper, Troy Cary, Silvia R. Cianzio, Shaun Casteel, Shawn Conley, Pengyin Chen, Vince Davis, Carolyn Fox, George Graef, Chad Godsey, David Holshouser, Guo-Liang Jiang, Stella K. Kantartzi, William Kenworthy, Chad Lee, Rouf Mian, Leah McHale, Seth Naeve, James Orf, Vaino Poysa, William Schapaugh, Grover Shannon, Robert Uniatowski, Dechun Wang and Brian Diers
      Genetic Improvement of U.S. Soybean in Maturity Groups II, III, and IV

      Soybean improvement via plant breeding has been critical for the success of the crop. The objective of this study was to quantify genetic change in yield and other traits that occurred during the past 80 yr of North American soybean breeding in Maturity Groups (MGs) II, III, and IV. Historic sets of 60 MG II, 59 MG III, and 49 MG IV soybean cultivars, released from 1923 to 2008, were evaluated in field trials conducted in 17 U.S. states and one Canadian province during 2010 to 2011. (continued)

      Published: April 28, 2014


    • Kazuki Saito, Elke Vandamme, Zacharie Segda, Mamadou Fofana and Kokou Ahouanton
      A Screening Protocol for Vegetative-stage Tolerance to Phosphorus Deficiency in Upland Rice

      Phosphorus deficiency is a major soil-related constraint to upland rice (Oryza sativa L.) production in Sub-Saharan Africa. Rice varieties adapted to low soil P and also respond well to added P fertilizer are needed. Simple and cost-effective screening protocols could help to identify varieties with superior growth at the vegetative stage. This would be particularly useful in weed-prone uplands where early vigor is an important trait. (continued)

      Published: February 20, 2015


    • Christine H. Diepenbrock and Michael A. Gore
      Closing the Divide between Human Nutrition and Plant Breeding

      Improvement of crop nutritional quality through breeding, termed biofortification, is a strategy being used to address micronutrient deficiencies worldwide. These efforts stand to benefit tremendously from recent advances across the plant sciences, from flourishing germplasm and genomic resources and phenotyping tools to improved characterization at the levels of physiology, cell biology, and gene expression. Next steps in crop biofortification in this decade and beyond include adapting high-throughput phenotyping platforms for measurement of nutritional quality traits, testing genome-wide and other DNA marker-based selection strategies that can mine parsimonious answers from large data sets, and further characterizing genotype × environment interactions and post-harvest effects on end nutrition. Also necessary are accompanying considerations of yield and other agronomic traits—in particular, the non-uniform responses of both these and quality traits to climate change across crops, environments, and farming management systems. (continued)

      Published: December 16, 2014

    • Kassa Semagn, Yoseph Beyene, Raman Babu, Sudha Nair, Manje Gowda, Biswanath Das, Amsal Tarekegne, Stephen Mugo, George Mahuku, Mosisa Worku, Marilyn L. Warburton, Mike Olsen and B. M. Prasanna
      Quantitative Trait Loci Mapping and Molecular Breeding for Developing Stress Resilient Maize for Sub-Saharan Africa

      The International Maize and Wheat Improvement Center (CIMMYT), in partnership with several public and private institutions, is working to develop and deploy improved maize (Zea mays L.) germplasm that is drought tolerant, nitrogen use efficient (NUE), and disease resistant for sub-Saharan Africa (SSA), using conventional pedigree selection and molecular breeding. Here, we provide an overview of the progress made on (i) quantitative trait loci (QTL) analysis for drought, NUE, and maize lethal necrosis (MLN); (ii) development of production markers for maize streak virus (MSV) and MLN resistance; and (iii) marker-assisted recurrent selection (MARS) and genomic selection (GS) for developing drought tolerant maize germplasm. We identified several small to moderate effect QTL associated with grain yield and anthesis-silking interval under low N, managed drought, and optimum environments, but only a few small to moderate effect QTL were detected in multiple genetic backgrounds. Thus, CIMMYT is conducting the largest public MARS and GS projects in SSA. (continued)

      Published: December 5, 2014


    • B. Shaun Bushman, Scott E. Warnke, Keenan L. Amundsen, Kathleen M. Combs and Paul G. Johnson
      Molecular Markers Highlight Variation within and among Kentucky Bluegrass Varieties and Accessions

      Assessing relationships among germplasm and cultivars of Kentucky bluegrass (Poa pratensis L.) is limited to field evaluations or a small set of molecular markers. To improve the efficiency of characterizing Kentucky bluegrass cultivars and germplasm, this study was designed to develop a larger set of robust molecular makers and a concise panel of cultivars to assess relationships of Kentucky bluegrass. An extensive library of simple sequence repeat markers was developed and used to assess relationships among and within 24 cultivars and accessions. Plants generally grouped as cultivars in cluster analysis, but molecular outlying plants and phenotypic off-type plants were found in 15 of the entries. (continued)

      Published: February 7, 2014

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