@article{babar_khan_blount_barnett_harrison_dewitt_johnson_mergoum_boyles_murphy_et al._2024, title={Registration of 'FL16045-25': An early-maturing, high-yielding, disease-resistant soft red facultative wheat cultivar for the southern United States}, volume={4}, ISSN={["1940-3496"]}, DOI={10.1002/plr2.20343}, abstractNote={Abstract}, journal={JOURNAL OF PLANT REGISTRATIONS}, author={Babar, Md Ali and Khan, Naeem and Blount, Ann and Barnett, Ronald D. and Harrison, Stephen A. and Dewitt, Noah and Johnson, Jerry and Mergoum, Mohamed and Boyles, Rick and Murphy, Paul and et al.}, year={2024}, month={Apr} }
 @article{mashaheet_burkey_marshall_2023, title={The interaction of O3 and CO2 concentration, exposure timing and duration on stem rust severity on winter wheat variety 'Coker 9553'}, volume={334}, ISSN={["1873-6424"]}, DOI={10.1016/j.envpol.2023.122122}, abstractNote={Wheat rusts, elevated ozone (O3), and carbon dioxide (CO2) are simultaneously impacting wheat production worldwide, but their interactions are not well understood. This study investigated whether near-ambient O3 is suppressive or conducive to stem rust (Sr) of wheat, considering the interactions with ambient and elevated CO2. Winter wheat variety 'Coker 9553' (Sr-susceptible; O3 sensitive) was inoculated with Sr (race QFCSC) following pre-treatment with four different concentrations of O3 (CF, 50, 70, and 90 ppbv) at ambient CO2 levels. Gas treatments were continued during the development of disease symptoms. Disease severity, measured as percent sporulation area (PSA), significantly increased relative to the CF control only under near-ambient O3 conditions (50 ppbv) in the absence of O3-induced foliar injury. Disease symptoms at higher O3 exposures (70 and 90 ppbv) were similar to or less than the CF control. When Coker 9553 was inoculated with Sr while exposed to CO2 (400; 570 ppmv) and O3 (CF; 50 ppbv) in four different combinations, and seven combinations of exposure timing and duration, PSA significantly increased only under continuous treatment with O3 for six weeks or pre-inoculation treatment for three weeks, suggesting that O3-predisposes wheat to the disease rather than enhancing disease post-inoculation. O3 singly and in combination with CO2 increased PSA on flag leaves of adult Coker 9553 plants while elevated CO2 alone had little effect on PSA. These findings show that sub-symptomatic O3 conditions are conducive to stem rust, contradicting the current consensus that biotrophic pathogens are suppressed by elevated O3. This suggests that sub-symptomatic O3 stress may enhance rust diseases in wheat-growing regions.}, journal={ENVIRONMENTAL POLLUTION}, author={Mashaheet, Alsayed M. and Burkey, Kent O. and Marshall, David S.}, year={2023}, month={Oct} }
 @article{dewitt_guedira_murphy_marshall_mergoum_maltecca_brown-guedira_2022, title={A network modeling approach provides insights into the environment-specific yield architecture of wheat}, volume={5}, ISSN={["1943-2631"]}, url={https://doi.org/10.1093/genetics/iyac076}, DOI={10.1093/genetics/iyac076}, abstractNote={Abstract}, number={3}, journal={GENETICS}, author={DeWitt, Noah and Guedira, Mohammed and Murphy, Joseph Paul and Marshall, David and Mergoum, Mohamed and Maltecca, Christian and Brown-Guedira, Gina}, editor={Juenger, TEditor}, year={2022}, month={May} }
 @article{mergoum_johnson_buck_sutton_lopez_bland_chen_buntin_mailhot_babar_et al._2021, title={'GA JT141-14E45': A new soft red winter wheat cultivar adapted to Georgia and the US Southeast region}, volume={8}, ISSN={["1940-3496"]}, DOI={10.1002/plr2.20070}, abstractNote={Abstract}, journal={JOURNAL OF PLANT REGISTRATIONS}, author={Mergoum, Mohamed and Johnson, Jerry W. and Buck, James W. and Sutton, Steve and Lopez, Benjamin and Bland, Daniel and Chen, Z. and Buntin, G. D. and Mailhot, Daniel J. and Babar, Md A. and et al.}, year={2021}, month={Aug} }
 @article{ward_merrill_bulli_pumphrey_mason_mergoum_johnson_sapkota_lopez_marshall_et al._2021, title={Analysis of the primary sources of quantitative adult plant resistance to stripe rust in US soft red winter wheat germplasm}, volume={14}, ISSN={["1940-3372"]}, DOI={10.1002/tpg2.20082}, abstractNote={Abstract}, number={1}, journal={PLANT GENOME}, author={Ward, Brian P. and Merrill, Keith and Bulli, Peter and Pumphrey, Mike and Mason, Richard Esten and Mergoum, Mohamed and Johnson, Jerry and Sapkota, Suraj and Lopez, Benjamin and Marshall, David and et al.}, year={2021}, month={Mar} }
 @article{dewitt_guedira_lauer_murphy_marshall_mergoum_johnson_holland_brown-guedira_2021, title={Characterizing the oligogenic architecture of plant growth phenotypes informs genomic selection approaches in a common wheat population}, volume={22}, ISSN={["1471-2164"]}, DOI={10.1186/s12864-021-07574-6}, abstractNote={Abstract}, number={1}, journal={BMC GENOMICS}, author={DeWitt, Noah and Guedira, Mohammed and Lauer, Edwin and Murphy, J. Paul and Marshall, David and Mergoum, Mohamed and Johnson, Jerry and Holland, James B. and Brown-Guedira, Gina}, year={2021}, month={May} }
 @article{ibrahim_sutton_johnson_mergoum_simoneaux_harrison_murphy_mason_babar_neely_et al._2021, title={Registration of 'GA06343-13E2 (TX-EL2)' soft red winter wheat}, volume={15}, ISBN={1940-3496}, DOI={10.1002/plr2.20031}, abstractNote={Abstract}, number={1}, journal={JOURNAL OF PLANT REGISTRATIONS}, author={Ibrahim, Amir M. H. and Sutton, Russell and Johnson, Jerry W. and Mergoum, Mohamed and Simoneaux, Bryan and Harrison, Stephen A. and Murphy, J. Paul and Mason, R. Esten and Babar, Md A. and Neely, Clark and et al.}, year={2021}, month={Jan}, pages={107–112} }
 @article{mergoum_johnson_buck_sutton_lopez_bland_chen_buntin_mailhot_babar_et al._2021, title={Soft red winter wheat 'GA 051207-14E53': Adapted cultivar to Georgia and the US Southeast region}, volume={15}, ISSN={["1940-3496"]}, DOI={10.1002/plr2.20102}, abstractNote={Abstract}, number={1}, journal={JOURNAL OF PLANT REGISTRATIONS}, author={Mergoum, Mohamed and Johnson, Jerry W. and Buck, James W. and Sutton, Steve and Lopez, Benjamin and Bland, Daniel and Chen, Z. and Buntin, G. D. and Mailhot, Daniel J. and Babar, Md A. and et al.}, year={2021}, month={Jan}, pages={132–139} }
 @article{mashaheet_burkey_saitanis_abdelrhim_rafiullah_marshall_2020, title={Differential Ozone Responses Identified among Key Rust-Susceptible Wheat Genotypes}, volume={10}, ISSN={["2073-4395"]}, DOI={10.3390/agronomy10121853}, abstractNote={Increasing ambient ozone (O3) concentrations and resurgent rust diseases are two concomitant limiting factors to wheat production worldwide. Breeding resilient wheat cultivars bearing rust resistance and O3 tolerance while maintaining high yield is critical for global food security. This study aims at identifying ozone tolerance among key rust-susceptible wheat genotypes [Rust near-universal susceptible genotypes (RnUS)], as a first step towards achieving this goal. Tested RnUS included seven bread wheat genotypes (Chinese Spring, Line E, Little Club, LMPG 6, McNair 701, Morocco and Thatcher), and one durum wheat line (Rusty). Plants were treated with five O3 concentrations (CF, 50, 70, 90, and 110 ppb), in two O3 exposure systems [continuous stirred tank reactors (CSTR) and outdoor-plant environment chambers (OPEC)], at 21–23 Zadoks decimal growth stage. Visible injury and biomass accumulation rate were used to assess O3 responses. Visible injury data showed consistent order of genotype sensitivity (Thatcher, LMPG 6 > McNair 701, Rusty > Line E, Morocco, Little Club > Chinese Spring). Additionally, leaves at different orders showed differential O3 responses. Biomass accumulation under O3 stress showed similar results for the bread wheat genotypes. However, the durum wheat line “Rusty” had the most O3-sensitive biomass production, providing a contrasting O3 response to the tolerance reported in durum wheat. Chinese Spring was the most tolerant genotype based on both parameters and could be used as a source for O3 tolerance, while sensitive genotypes could be used as sensitive parents in mapping O3 tolerance in bread wheat. The suitability of visible symptoms and biomass responses in high-throughput screening of wheat for O3 tolerance was discussed. The results presented in this research could assist in developing future approaches to accelerate breeding wheat for O3 tolerance using existing breeding materials.}, number={12}, journal={AGRONOMY-BASEL}, author={Mashaheet, Alsayed M. and Burkey, Kent O. and Saitanis, Costas J. and Abdelrhim, Abdelrazek S. and Rafiullah and Marshall, David S.}, year={2020}, month={Dec} }
 @article{rehman_gale_brown-guedira_jin_marshall_whitcher_williamson_rouse_ahmad_ahmad_et al._2020, title={Identification of seedling resistance to stem rust in advanced wheat lines and varieties from Pakistan}, volume={60}, ISSN={["1435-0653"]}, DOI={10.1002/csc2.20056}, abstractNote={Abstract}, number={2}, journal={CROP SCIENCE}, author={Rehman, Monsif Ur and Gale, Sam and Brown-Guedira, Gina and Jin, Yue and Marshall, David and Whitcher, Lynda and Williamson, Sharon and Rouse, Matthew and Ahmad, Javed and Ahmad, Gulzar and et al.}, year={2020}, pages={804–811} }
 @article{cowger_arellano_marshall_fitzgerald_2019, title={Managing Fusarium Head Blight in Winter Barley With Cultivar Resistance and Fungicide}, volume={103}, ISSN={["1943-7692"]}, url={https://doi.org/10.1094/PDIS-09-18-1582-RE}, DOI={10.1094/PDIS-09-18-1582-RE}, abstractNote={ Although there has been research on managing Fusarium head blight (FHB) in spring barley, little has been published on cultivar resistance and optimal fungicide timing for FHB management in winter barley. A 3-year (2015 to 2017) field experiment was conducted to measure FHB resistance of winter barley varieties, gauge the potential benefit from a fungicide, and help determine the optimal timing for fungicide application. The split-plot experiment took place in a misted, inoculated nursery in Raleigh, North Carolina using main plots of four winter barley cultivars (Atlantic, Endeavor, Nomini, and Thoroughbred). Three fungicide treatments were applied to subplots: prothioconazole + tebuconazole at full spike emergence, the same fungicide 6 days later, or no fungicide. The late applications significantly reduced FHB index in each of 3 years and significantly reduced deoxynivalenol (DON) in harvested grain in 2 of the 3 years. Applications at full spike emergence also yielded significant benefit in 1 of the 3 years for each parameter. Neither disease symptoms nor DON gave reason to prefer one of the fungicide timings over the other. Across the 3 years, DON ranked the cultivars Endeavor < Nomini = Thoroughbred < Atlantic. Combining the moderate resistance of Endeavor with a fungicide application and averaging the two timings resulted in a 75% DON reduction compared with unsprayed Atlantic. Taken together, our results indicate that barley growers concerned about minimizing DON should both plant moderately resistant varieties and apply fungicide if there is scab risk. During the same period, 16 commercial winter barley cultivars were tested in from three to seven Virginia and North Carolina environments each, and the DON results were compared after standardization across environments. The winter two-row malting barley cultivars Endeavor and Calypso displayed superior and robust DON resistance across environments. }, number={8}, journal={PLANT DISEASE}, publisher={Scientific Societies}, author={Cowger, Christina and Arellano, Consuelo and Marshall, David and Fitzgerald, Joshua}, year={2019}, month={Aug}, pages={1858–1864} }
 @article{boyles_marshall_bockelman_2019, title={Yield Data from the Uniform Southern Soft Red Winter Wheat Nursery Emphasize Importance of Selection Location and Environment for Cultivar Development}, volume={59}, ISSN={["1435-0653"]}, DOI={10.2135/cropsci2018.11.0685}, abstractNote={Yield and agronomic data from a regional soft red winter wheat (Triticum aestivum L.) nursery—consisting of 604 advanced breeding lines (ABLs) and 36 testing locations over a 21‐yr period—were evaluated to understand recent genetic gains in wheat and determine the impact of selection location and environment on cultivar performance and adaptation. Relative mean yield improvement of ABLs with respect to historical cultivar AGS 2000 was 106 kg ha−1 yr−1 (1.58 bu acre−1 yr−1), equating to an annual genetic gain of 1.6%. Yield gains for wheat during this timespan were attributed to an increase in both yield potential and stability across environments. However, a strong tradeoff (r = −0.36, p < 2.2 × 10−16) was observed between yield potential and stability. Additionally, distance between selection and evaluation environments was significantly correlated with yield, with yield decreasing as distance between locations increased. Advanced breeding lines had a +221, +126, and −29.6 kg ha−1 yr−1 (+3.29, +1.88, and −0.44 bu acre−1) yield difference over the location mean when the selection location was within, adjacent, and nonadjacent to the trial location zone, respectively. Advanced breeding lines in general performed poorly in production environments west of their selection site. Based on data analyzed, elevation and latitude are significant geographic parameters to consider when determining optimal selection location for a production environment. Meanwhile, change in growing degree days between selection and evaluation location had a stronger influence on yield than precipitation. Findings demonstrate the importance and benefits of breeder collaborations and multienvironment testing on crop improvement, which will be needed to maximize yield gains in the 21st century.}, number={5}, journal={CROP SCIENCE}, author={Boyles, Richard E. and Marshall, David S. and Bockelman, Harold E.}, year={2019}, pages={1887–1898} }
 @article{graybosch_baenziger_bowden_dowell_dykes_jin_marshall_ohm_caffe-treml_2018, title={Release of 19 Waxy Winter Wheat Germplasm, with Observations on Their Grain Yield Stability}, volume={12}, ISSN={["1940-3496"]}, DOI={10.3198/jpr2017.03.0018crg}, abstractNote={“Waxy” wheats (Triticum aestivum L.) produce endosperm starch devoid, or nearly so, of amylose. Waxy starch consists only of amylopectin, imparts unique cooking properties, and serves as an efficient substrate for the production of modified food starches. To expand the genetic variation of waxy wheats useful to Great Plains breeding programs, the USDA‐ARS, in cooperation with the University of Nebraska, developed and released 19 waxy winter wheats (Reg. No. GP‐1003, PI 677864 to Reg. No. GO‐1021, PI 677882) . Three of the waxy germplasm lines have soft endosperm texture; the remaining 16 lines have hard‐textured grain. The grain yields of six of the waxy winter wheat germplasm lines were not significantly different from the highest yielding nonwaxy cultivar (‘Freeman’). All but four waxy germplasm lines had grain yields statistically equal to that of the waxy winter wheat cultivar Mattern. Grain yield stability (or response to changing environments) of the waxy germplasm lines demonstrated similar trends to those of the nonwaxy controls. Grain yield observations and responses to changing production potentials argue against any yield drag associated with waxy starch and indicate potential for the development of additional and competitive cultivars.}, number={1}, journal={JOURNAL OF PLANT REGISTRATIONS}, author={Graybosch, R. A. and Baenziger, P. S. and Bowden, R. L. and Dowell, F. and Dykes, L. and Jin, Y. and Marshall, D. S. and Ohm, J-B. and Caffe-Treml, M.}, year={2018}, month={Jan}, pages={152–156} }