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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 research. Articles are compiled into 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.

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

Current issue: Crop Sci. 57(6)


    • Anja Karine Ruud, Jon Arne Dieseth and Morten Lillemo
      Effects of Three Parastagonospora nodorum Necrotrophic Effectors on Spring Wheat under Norwegian Field Conditions

      The wheat (Triticum aestivum L.) disease Septoria nodorum blotch (SNB) is caused by the necrotrophic fungus Parastagonospora nodorum (Berk.) Quaedvlieg, Verkley & Crous and causes significant yield and quality losses in several wheat growing regions. The resistance mechanisms are quantitative and progress in resistance breeding has been slow. However, gene-for-gene interactions involving necrotrophic effectors (NEs) and sensitivity genes (Snn) are involved, providing hope for more effective breeding. Although the interactions are significant determinants of seedling SNB susceptibility, their role in adult plant leaf blotch resistance in the field is less understood. (continued)

      Published: November 16, 2017

    • Xinlong Chen, Maodi Zhu, Fengxing Gu, Mingming Liu, Yingying Zhang, Yadi Xing, Dan Du, Yanhua Xiao, Xiaoyan Zhu and Guanghua He
      Identification and Gene Fine Mapping of Starch Accumulation and Early Senescent Leaf Mutant esl10 in Rice

      A novel starch accumulation and early senescent leaf mutant esl10 was identified among progenies of the rice (Oryza sativa L.) indica maintainer line Xinong 1B raised from seeds treated with ethyl methane sulfonate (EMS). Under paddy field conditions, leaf starch accumulation commenced at the three-leaf stage in the mutant esl10 and the leaves began to yellow at the four-leaf stage, gradually extending from the tip to the middle of the leaf. The yellowing phenotype was most obvious at the tillering stage and persisted until maturity. Compared with the wild type, photosynthetic pigment concentrations and net photosynthetic rate of esl10 were significantly lower, whereas the concentrations of reactive oxygen species and malondialdehyde (MDA) were higher. (continued)

      Published: November 16, 2017

    • Ryan D. Huffman, Craig A. Abel, Linda M. Pollak, Walter Goldstein, Richard C. Pratt, Margaret E. Smith, Kevin Montgomery, Lois Grant, Jode W. Edwards and M. Paul Scott
      Maize Cultivar Performance under Diverse Organic Production Systems

      Maize (Zea mays L.) performance can vary widely between different production systems. The need for high-performing hybrids for organic systems with wide adaptation to various macroenvironments is becoming increasingly important. The goal of this study was to characterize inbred lines developed by distinct breeding programs for their combining ability and hybrid yield performance across diverse organic environments. Parent lines were selected from five different breeding programs to give a sample of publically available germplasm with potential for use in organic production systems with expired plant variety protection (Ex-PVP) and current commercial inbreds as benchmarks. (continued)

      Published: November 16, 2017

    • Erik W. Ohlson, Sirando L. Seido, Suheb Mohammed, Carlos A. F. Santos and Michael P. Timko
      QTL Mapping of Ineffective Nodulation and Nitrogen Utilization-Related Traits in the IC-1 Mutant of Cowpea

      Biological nitrogen fixation is a valuable component of sustainable agriculture. Improved understanding of nodulation pathways can facilitate enhancement of nitrogen utilization-related traits. Previously, a cowpea [Vigna unguiculata (L.) Walp.] mutant, ‘IC-1’, with ineffective nodules was identified. Heritability studies indicated that ineffective nodulation in IC-1 was controlled by a single gene designated cpi. (continued)

      Published: November 9, 2017

    • Selamawit Tekle, Morten Lillemo, Helge Skinnes, Lars Reitan, Trond Buraas and Åsmund Bjørnstad
      Screening of Oat Accessions for Fusarium Head Blight Resistance Using Spawn-Inoculated Field Experiments

      Use of resistant cultivars is one of the most important measures to reduce the risk of Fusarium head blight (FHB, caused by various Fusarium spp.) and mycotoxins in cereals. Research on resistance to FHB has mainly focused on wheat (Triticum aestivum L.) and barley (Hordeum vulgare L.) and is very limited in oat (Avena sativa L.). In Norway, routine testing of cultivars and breeding lines has been performed in spawn-inoculated field experiments with Fusarium graminearum Schwabe as part of a concerted research and breeding effort to improve FHB resistance in oat. Data on FHB symptom, days to flowering, and plant height have been collected during the field seasons. (continued)

      Published: November 2, 2017

    • Araby R. Belcher, Alfonso Cuesta-Marcos, Kevin P. Smith and Patrick M. Hayes
      TCAP FAC-WIN6 Elite Barley GWAS Panel QTL. II. Malting Quality QTL in Elite North American Facultative and Winter Six-Rowed Barley Identified via GWAS

      Malt barley (Hordeum vulgare L.) is an economically important crop worldwide. Barley malting quality is difficult to breed for, as it is a combination of complex traits that are time consuming and expensive to phenotype. This makes marker-assisted selection—and thus quantitative trait locus (QTL) mapping—particularly appealing. We used the Oregon State University and University of Minnesota facultative and winter six-rowed barley advanced breeding lines to assemble a genomewide association studies (GWAS) panel, named the FAC-WIN6, to map malting quality QTL within our breeding programs. (continued)

      Published: October 30, 2017

    • Kaio Olímpio Das Graças Dias, Salvador Alejandro Gezan, Claudia Teixeira Guimarães, Sidney Netto Parentoni, Paulo Evaristo de Oliveira Guimarães, Newton Portilho Carneiro, Arley Figueiredo Portugal, Edson Alves Bastos, Milton José Cardoso, Carina de Oliveira Anoni, Jurandir Vieira de Magalhães, João Cândido de Souza, Lauro José Moreira Guimarães and Maria Marta Pastina
      Estimating Genotype × Environment Interaction for and Genetic Correlations among Drought Tolerance Traits in Maize via Factor Analytic Multiplicative Mixed Models

      Water deficit is one of the most common causes of severe crop-production losses worldwide in maize (Zea mays L.). The main goal of this study was to infer about genotype × environment interaction (G × E) and to estimate genetic correlations between drought tolerance traits in maize using factor analytic (FA) multiplicative mixed models in the context of multi-environment trial (MET) and multi-trait multi-environment trial (MTMET) analyses. The traits measured were: grain yield (GY), ears per plot (EPP), anthesis-silking interval (ASI), female flowering time (FFT), and male flowering time (MFT). Three-hundred and eight hybrids were evaluated in a total of eight trials conducted under water-stressed (WS) and well-watered (WW) conditions across 2 yr and two locations in Brazil. (continued)

      Published: October 30, 2017

    • J. A. Kolmer, S. Chao, G. Brown-Guedira, U. Bansal and H. Bariana
      Adult Plant Leaf Rust Resistance Derived from the Soft Red Winter Wheat Cultivar ‘Caldwell’ Maps to Chromosome 3BS

      ‘Caldwell’ is a US soft red winter wheat (Triticum aestivum L.) that has partial, adult plant resistance to the leaf rust pathogen Puccinia triticina Eriks. A line of ‘Thatcher*2/Caldwell’ with adult plant resistance derived from Caldwell was crossed with ‘Thatcher’ to develop a population of recombinant inbred lines (RILs). The parents and RIL population were evaluated for segregation of leaf rust resistance in four field tests. A genetic map of the RIL population was constructed using 90K single-nucleotide polymorphism (SNP) markers with the Illumina Infinium iSelect 90K wheat bead array. (continued)

      Published: October 19, 2017


    • Xi Liang, John E. Erickson, Lynn E. Sollenberger, Diane L. Rowland, Maria L. Silveira and Wilfred Vermerris
      Growth and Transpiration Responses of Elephantgrass and Energycane to Soil Drying

      Elephantgrass (Pennisetum purpureum Schum.) and energycane (Saccharum spp.) are promising perennial bioenergy crops in the southeastern United States. Despite plentiful rainfall in this region, these perennial grasses have a long growing season and are subject to intermittent drying cycles frequently during summer and fall, yet there is little information on their response to intermittent drought stress. The objectives of this study were to investigate water relations of elephantgrass and energycane genotypes under optimal water inputs and in response to progressive soil drying. Three elephantgrass genotypes (‘UF-1’, ‘Merkeron’, and ‘PI-300086’) and three energycane genotypes (‘L79-1002’, ‘US84-1047’, and ‘875-3’) were grown in a greenhouse. (continued)

      Published: November 16, 2017

    • Libiao Gao, Claude D. Caldwell and Yunfei Jiang
      Photosynthesis and Growth of Camelina and Canola in Response to Water Deficit and Applied Nitrogen

      Nitrogen (N) and water availabilities are two important environmental factors affecting crop growth and yield. Effects of applied N and water deficit imposition on photosynthesis rate (Pn), transpiration rate (E), stomatal conductance (gs), and shoot and root biomass accumulation in camelina [Camelina sativa (L.) Crantz] and canola (Brassica napus L.) were compared in a greenhouse. Water deficit significantly decreased Pn, E, gs, and shoot/root biomass ratio in both crops. The relative reduction of Pn, E, and gs caused by water deficit was greater in canola than in camelina. (continued)

      Published: November 9, 2017

    • J. A. Di Matteo, K. E. Goldenhar and H. J. Earl
      Minimum Daily Respiration of Maize: Relationship to Total Daily Respiratory Carbon Loss, and Effects of Growth Stage and Temperature

      Since crop respiration can only be measured in darkness, estimating total daily crop respiration (Rt) requires knowledge of the quantitative relationship between daytime and nighttime respiration, including the predicted effect of temperature. We measured minimum daily (early morning) respiration (Rmin) in maize (Zea mays L.) at four different temperatures during the night and at four different growth stages to estimate the respiration response to temperature. In a field experiment, respiration was measured every 2 to 5 h over a 24-h period at five different growth stages to explore the relationship between Rt and Rmin. The fractional rate change with 10°C temperature increment (Q10) decreased as the temperature increased. (continued)

      Published: October 30, 2017

    • Long Qian, Xiugui Wang, Yunying Luo, Huaiwei Sun and Wenbing Luo
      Responses of Cotton at Different Growth Stages to Aeration Stress under the Influence of High Temperature

      In the middle reach of the Yangtze River Plain, cotton (Gossypium hirsutum. L) can experience aeration stress at multiple growth stages, often accompanied by high temperature. These two stresses can negatively affect growth and yield. This study aimed to investigate the responses of cotton at different growth stages to aeration stress, particularly under high temperature. Two field experiments examining cotton responses to aeration stress were conducted over 8 yr, and structural equation modeling was performed to reveal the relationships among aeration stress, high temperature, and the growth and yield of cotton at four growth stages. (continued)

      Published: October 30, 2017


    • Jadwiga Andrzejewska, Francisco E. Contreras-Govea, Paolo Berzaghi and Kenneth A. Albrecht
      Forage Accumulation and Nutritive Value of Italian Ryegrass–Kura Clover Mixture in Central Europe

      The quest to reduce importation of plant protein for livestock feed and to reduce expense and environmental consequences of nitrogen fertilizer use have resulted in renewed interest in forage legumes in EU countries. The objectives of this study were: (i) to assess forage accumulation and nutritive value of mixtures of Italian ryegrass (IRG, Lolium multiflorum Lam.) and kura clover (KC, Trifolium ambiguum M. Bieb.), and (ii) to model milk production potential of this mixture, relative to IRG and KC monocultures in northern Poland. Italian ryegrass and KC were grown in monocultures or intercropped (IRG-KC mixture) and harvested three times per year in two consecutive years. (continued)

      Published: October 30, 2017


    • Brent P. Murphy and Patrick J. Tranel
      Identification and Validation of Amaranthus Species-Specific SNPs within the ITS Region: Applications in Quantitative Species Identification

      The Amaranthus genus consists of as many as 70 species, many with similar morphology. The development and validation of a DNA barcode specific to key amaranths would aid in plant identification. These barcodes can be used to develop assays for single-species identification, critical for species surveillance and contaminant screening. A reference panel of 75 internal transcribed spacer (ITS) sequences from the National Center for Biotechnology Information (NCBI) across 11 Amaranthus spp. (continued)

      Published: November 16, 2017

    • Naoya Yamaguchi, Shizen Ohnishi and Tomoaki Miyoshi
      Screening for Chilling-Tolerant Soybeans at the Flowering Stage Using a Seed Yield- and Maturity-Based Evaluation Method

      Cold weather damages soybean [Glycine max (L.) Merr.] crops in high-latitude countries. The decreased seed yields caused by low temperatures are attributed to three main factors: poor growth during the early growth stage, abscission of flowers and pods at the flowering stage, and insufficient grain filling at the pod-filling stage. The abscission of flowers and pods is the most important factor that contributes to reduced yields. There are differences in chilling tolerance among cultivars developed in Japan at the flowering stage. (continued)

      Published: November 2, 2017


    • B. F. Tracy, J. L. Foster, T. J. Butler, M. A. Islam, D. Toledo and J. M. B. Vendramini
      Resilience in Forage and Grazinglands

      The current reality of population growth, resource scarcity, and climate change requires resilient agroecosystems to sustain food production and protect the environment. This manuscript reflects a combined effort of speakers at the 2017 C6 Forage and Grazinglands Division Symposium, which was titled “Resiliency in Forage and Grazinglands.” The symposium brought together speakers representing a diverse cross-section of forage systems across the United States. Each speaker discussed resilience-related topics from their specific region, including: the importance of diversity and use of complementary forages in grazing systems, how grazing and defoliation affect resilience, the importance of soil fertility and pest management, and development of decision aids to evaluate resilience in grazinglands. Several themes emerged that we propose would help improve the resilience of forage and grazingland systems: (i) identifying moderately diverse, site-specific mixtures (grasses–legumes) for use in specific regions of the United States, (ii) greater use of complementary forage species such as C3 and C4 grasses to lengthen the grazing season and provide a buffer against weather variation, (iii) adoption of moderate defoliation intensities to help stabilize forage production and species composition, (iv) more attention to maintaining and improving soil fertility to improve the productivity of desirable forage species and reduce weed pressure, and (v) increase adoption of assessment tools to evaluate the relative “health” and potential resilience of forage-livestock systems. (continued)

      Published: November 16, 2017

    • Yared Assefa, P. V. Vara Prasad, Chris Foster, Yancy Wright, Steven Young, Pauley Bradley, Michael Stamm and Ignacio A. Ciampitti
      Major Management Factors Determining Spring and Winter Canola Yield in North America

      Canola (Brassica napus L. cv. ‘Canola’) production has both economic and agronomic advantages. The objectives of this review were to summarize the key management factors determining crop productivity and to propose plausible pathways to narrow the gap between actual and potential yield. (continued)

      Published: October 30, 2017


    • Araby R. Belcher, Alfonso Cuesta-Marcos, Kevin P. Smith, Christopher C. Mundt, Xianming Chen and Patrick M. Hayes
      TCAP FAC-WIN6 Elite Barley GWAS Panel QTL. I. Barley Stripe Rust Resistance QTL in Facultative and Winter Six-Rowed Malt Barley Breeding Programs Identified via GWAS

      The fungal disease barley stripe rust (BSR, causal agent Puccinia striiformis f. sp. hordei) can greatly reduce yield and quality of malt barley (Hordeum vulgare L.), a valuable crop in the distilling and brewing industries. Yield losses of up to 70% have been reported. (continued)

      Published: October 30, 2017


    • Garett Heineck, Eric Watkins and Nancy Jo Ehlke
      Exploring Alternative Management Options for Multiyear Perennial Ryegrass Seed Production in Northern Minnesota

      Perennial ryegrass (Lolium perenne L.) is grown as a biennial when produced for seed in Minnesota; however, producers desire multiyear seed production. One approach to achieving multiyear seed production could be through improved management practices. In particular, plant growth regulators (PGRs) and fall residue management could help overcome several obstacles hindering multiyear seed production in northern climates. We assessed the impact of fall residue management practices and various PGRs after first-year harvest on winter survival and second-year seed yield of perennial ryegrass grown in northern Minnesota. (continued)

      Published: November 16, 2017

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