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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 dl.sciencesocieties.org/publications/cs, 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(5)


    • J. A. Kolmer, E. S. Lagudah, M. Lillemo, M. Lin and G. Bai
      The Lr46 Gene Conditions Partial Adult- Plant Resistance to Stripe Rust, Stem Rust, and Powdery Mildew in Thatcher Wheat

      Disease resistance is a critical goal for many wheat (Triticum aestivum L.) improvement programs. Wheat cultivars are affected by multiple diseases including the rusts and powdery mildew. The F6 recombinant inbred lines (RILs) derived from ‘Thatcher’*3/‘CI13227’ that had been previously characterized as having adult-plant leaf rust resistance gene Lr46 were further tested for resistance to stripe rust, stem rust, and powdery mildew. In field plot tests, the RILs segregated for resistance to stripe rust, stem rust, and powdery mildew, with the highest logarithm of odds (LOD) peak at the sequence tagged site marker csLV46, which is closely linked to Lr46 on chromosome 1BL. (continued)

      Published: August 3, 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


    • Ioannis S. Tokatlidis
      Conservation Breeding of Elite Cultivars

      It is now well known that the genome is more flexible and plastic than previously assumed and undergoes constant remodeling and restructuring. Residual heterozygosity and molecular mechanisms that generate de novo variation may result in considerable intracultivar variation. In the long term, cultivars adopted and widely grown by farmers may lose their identity and healthiness. Nevertheless, longevity of elite cultivars is of paramount importance due to time-consuming and costly endeavors to breed them. (continued)

      Published: August 3, 2015


    • Claire H. Luby, Jack Kloppenburg, Thomas E. Michaels and Irwin L. Goldman
      Enhancing Freedom to Operate for Plant Breeders and Farmers through Open Source Plant Breeding

      The Open Source Seed Initiative (OSSI) (www.osseeds.org) seeks to address the dramatic transition over the past 100 yr in how plant germplasm is distributed, developed, and released: from a freely available resource primarily located in the public sector to proprietary structures managed largely by the private sector. OSSI was developed by a group of plant breeders, farmers, seed companies, nonprofit organizations, and policymakers with the goal of promoting and maintaining open access to plant genetic resources worldwide. OSSI seeks to provide an alternative to pervasive intellectual property rights agreements that restrict freedom to use plant germplasm through the development and promulgation of a Pledge which is intended both to raise awareness of these issues and to ensure that germplasm can be freely exchanged now and into the future. In this paper we discuss the historical forces and trends that have led to various types of biological and intellectual property protections and how this has potentially limited plant breeders’ “freedom to operate” and farmers’ sovereignty over seed. (continued)

      Published: May 21, 2015


    • Lynn E. Sollenberger
      Challenges, Opportunities, and Applications of Grazing Research

      Grazing experiments provide fundamental information on the biology of grassland ecosystems, enable selection of persistent forage cultivars that support animal production, and develop management guidelines for end users. Challenges to proper conduct of grazing research include achieving meaningful time and spatial scales, difficulty in measurement of key variables, and scarcity of research funding. Opportunities are emerging for grazing research as a result of increasing awareness of grassland multifunctionality, ecosystem services, and environmental impacts. Capitalizing on these opportunities will require increased participation in grazing research by collaborators from a broader range of ecosystem sciences. (continued)

      Published: June 12, 2015


    • F. M. Rouquette
      Grazing Systems Research and Impact of Stocking Strategies on Pasture–Animal Production Efficiencies

      Grazing systems research includes a wide array of component experimentation to assess plant–animal responses on pastures during short-term, seasonal, and long-term periods. Pasture-animal experiments seek to assess forage growth responses to grazing and to quantify relationships between forage growth and nutritive value to gains per animal and per hectare. These experiments have used fixed and variable stocking rate management, continuous or rotational methods of stocking, and other stocking strategies to evaluate levels of production efficiencies. Stocking strategies require the integration of periodic and total forage mass, associated nutritive attributes, specific defoliation regimen responses, and incorporation of weather conditions to meet end-point objectives. (continued)

      Published: August 3, 2015

    • Robert L. Kallenbach
      Describing the Dynamic: Measuring and Assessing the Value of Plants in the Pasture

      The dynamic nature of pastures makes them difficult to quantify. Understanding the near-constant change in plant morphology and development in relation to both biotic (grazing, pathogens, and insects) and abiotic (drought, cold, and heat) events provide the scientific basis for optimizing pasture management plans. Challenges include (i) the cost, primarily for skilled labor, to measure these parameters and (ii) having a scientific team large enough and diverse enough to analyze and interpret the data. New technologies offer opportunities to inexpensively measure pasture growth dynamics. (continued)

      Published: June 26, 2015

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