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United States Department of Agriculture

Agricultural Research Service

Richard C. Johnson

Research Agronomist


Publications (Clicking on the reprint icon Reprint Icon will take you to the publication reprint.)
Differential resistance to stripe rust (Puccinia striiformis) in collections of basin wild rye (Leymus cinereus) - (Peer Reviewed Journal)
Dugan, F.M., Cashman, M.J., Chen, X., Johnson, R.C., Wang, M. 2014. Differential resistance to stripe rust (Puccinia striiformis) in collections of basin wild rye (Leymus cinereus). Plant Health Progress. 15:34-39.
Kentucky bluegrass (Poa pratensis L.) germplasm for non-burn seed production - (Book / Chapter)
Johnston, W.J., Johnson, R.C., Golob, C.T., Dodson, K.L., Silbernagel, D.D., Stahnke, G.K. 2014. Kentucky bluegrass (Poa pratensis L.) germplasm for non-burn seed production. p 43-48. In: Rakshit, A., editor. Technological advancement for vibrant agriculture. Athens, Greece:Atiner. p.43-48.
Comparative growth and development of hexaploid and tetraploid reed canarygrass - (Peer Reviewed Journal)
Johnson, R.C., Evans, M. 2014. Comparative growth and development of hexaploid and tetraploid reed canarygrass. Crop Science. 54:1062–1069.
Genetic variation in adaptive traits and seed transfer zones for Pseudoroegneria spicata (bluebunch wheatgrass) in the northwestern United States - (Peer Reviewed Journal)
St. Clair, J., Kilkenny, F., Johnson, R.C., Shaw, N., Weaver, G. 2013. Genetic variation in adaptive traits and seed transfer zones for Pseudoroegneria spicata (bluebunch wheatgrass) in the northwestern United States. Evolutionary Applications. Evol. Appl.: doi:10.1111/eva.12077.
Genecology for seed zones: Problems and solutions - (Abstract Only)
Johnson, R.C., and Brad St Clair. 2013 Genecology for seed zones: Problems and solutions. National Native Seed Conference Abstracts http://nativeseed.info/wp-content/uploads/2013/04/program-web.pdf
Genecology of Indian ricegrass in the Southwest - (Abstract Only)
Johnson, R.C. 2013. Genecology of Indian ricegrass in the Southwest. Plant Animal and Microbe Genomes Conference. https://pag.confex.com/pag/xxi/webprogram/Paper4897.html.
Yield and yield components of winter-type safflower - (Peer Reviewed Journal)
Johnson, R.C., Petrie, S.E., Franchini, M.C., Evans, M. 2012. Yield and yield components of winter-type safflower. Crop Science. 52:2358-2364.
Genetic diversity and population structure of Eurasian populations of reed canarygrass: cytotypes, cultivars, and interspecific hybrids Reprint Icon - (Peer Reviewed Journal)
Jakubowski, A., Casler, M.D., Johnson, R.C., Hu, J., Jackson, R. 2011. Genetic diversity and population structure of Eurasian populations of reed canarygrass: cytotypes, cultivars, and interspecific hybrids. Crop and Pasture Science. 62:982-991.
Winter safflower, a potential alternative crop for the Pacific Northwest - (Abstract Only)
Petrie, S., Johnson, R.C. 2011. Winter safflower, a potential alternative crop for the Pacific Northwest. Meeting Abstract. http://a-c-s.confex.com/crops/2011am/webprogramschedule/Paper67364.html.
Genecology and seed zones for Indian Ricegrass across the southwest USA - (Abstract Only)
Johnson, R.C., Cashman, M.J., Vance-Borland, K. 2012. Genecology and seed zones for Indian Ricegrass across the southwest USA. Meeting Abstract. http://www.rangelands.org/spokane2012.
Collection and seed production of Allium acuminatum - (Abstract Only)
Hellier, B.C., Johnson, R.C. 2011. Collection and seed production of Allium acuminatum. Meeting Abstract. Crop Science Society of America meeting, 10/15-10/19/2011 San Antonio TX.
Native plant conservation partnership with BLM and development of seed zones for restoration - (Abstract Only)
Johnson, R.C., Hellier, B.C., Cashman, M.J. 2011. Native plant conservation partnership with BLM and development of seed zones for restoration. Meeting Abstract. http://a-c-s.confex.com/crops/2011am/webprogram/Paper67747.html.
Ecological characterisation of supina bluegrass (Poa supina Schrad.) germplasm from the Italian Alps Reprint Icon - (Peer Reviewed Journal)
Pecetti, L., Johnson, R.C., Romani, M., Bassignana, M., Marianna, D.G. 2010. Ecological characterisation of supina bluegrass (Poa supina Schrad.) germplasm from the Italian Alps. Grass and Forage Science. doi: 10.1111/j.1365-2494.2010.00766.x.
Mapping genetic variation and seed zones for Bromus carinatus in the Blue Mountains of eastern Oregon, USA. Reprint Icon - (Peer Reviewed Journal)
Johnson, R.C., Erickson, V.J., Mandel, N.L., St Clair, J.B., Vance-Borland, K.W. 2010. Mapping genetic variation and seed zones for Bromus carinatus in the Blue Mountains of eastern Oregon, USA.. Botany 88: 725-736
Chapter 6: Safflower - (Book / Chapter) - (20-Apr-10)
Allium acuminatum Seed Production: First Look at Cultural Parameters - (Other)
Hellier, B.C., Johnson, R.C. 2010. Allium acuminatum Seed Production: First Look at Cultural Parameters. Great Basin Native Plant Selection and Increase Project. FY 2009 Progress Report.
Seed yield, development, and variation in diverse poa pratensis accessions Reprint Icon - (Peer Reviewed Journal)
Johnson, R.C., Johnston, W.J., Bertoli, F.L., Golob, C. 2011. Seed yield, Development, and Variation in Diverse Poa Pratensis Accessions. Crop Science. 50:337-344.
Feasibility of Seed Production from Non-flowering Orchardgrass Reprint Icon - (Peer Reviewed Journal)
Casler, M.D., Johnson, R.C., Barker, R.E., Jenderek, M.M., Papadopolous, Y.A., Cherney, J.H. 2010. Feasibility of Seed Production from Non-flowering Orchardgrass. Crop Science. 50:35-42.
Non-Target Plant Use by a Weed Biocontrol Agent in Idaho: Host Expansion or Opportunistic Behavior? Reprint Icon - (Peer Reviewed Journal)
Clement, S.L., Smith, L.J., Prena, J., Kleene, M.D., Johnson, R.C. 2009. Non-Target Plant Use by a Weed Biocontrol Agent in Idaho: Host Expansion or Opportunistic Behavior? Biocontrol Science and Technology 19:455-461.
Safflower Germplasm: Past, Present, and Future. - (Proceedings)
Johnson, R.C., Bradley, V.L., Kisha, T.J. 2008. Safflower Germplasm: Past, Present, and Future.. International Safflower Conference Proceedings.
Genebanks Pay Big Dividends to Agriculture, the Environment, and Human Welfare Reprint Icon - (Other)
Johnson, R.C. 2008. Genebanks Pay Big Dividends to Agriculture, the Environment, and Human Welfare. Public Library of Science Biology. http://biology.plosjournals.org/perlserv/?request=get-document&doi10.1371/journal.pbio.0060148(See URL).
Fall Growth, Selection, Water Relations and Membrane Leakage in Winter Safflower - (Peer Reviewed Journal)
Johnson, R.C., Dajue, L. 2008. Safflower winter survival and selection response relates to Fall Growth morphology and acclimation capacity. Crop Science 48:1872-1880.
Carbon Isotope Discrimination, Selection Response, and Forage Production of Tall Fescue in Contrasting Environments Reprint Icon - (Peer Reviewed Journal)
Johnson, R.C., Hopkins, A.A., Evans, M.A. 2008. Carbon Isotope Discrimination, Selection Response, and Forage Production of Tall Fescue in Contrasting Environments. Crop Science 48:10481054.
Registration of WSRC01, WSRC02, and WSRC03 Winter Hardy Safflower Germplasm Reprint Icon - (Germplasm Release)
Johnson, R.C., Li, D. Registration of WSRC01, WSRC02, and WSRC03 Winter Hardy Safflower Germplasm. Journal of Plant Registrations 2:140-142.
Seed Production from Non-flowering Orchardgrass: Proof of Concept - (Abstract Only)
Casler, M.D., Johnson, R.C., Barker, R.E., Jenderek, M.M., Papadopolous, Y.A., Cheney, J.H. 2007. Seed Production from Non-flowering Orchardgrass: Proof of Concept. ASA-CSSA-SSSA Annual Meeting Abstracts. Paper Number 175-1.
Collection, conservation, and seed zones for Tapertip onion (Allium acuminatum Hook). - (Proceedings) - (19-Jul-07)
Characterizing Safflower Germplasm with AFLP Molecular Markers Reprint Icon - (Peer Reviewed Journal)
Johnson, R.C., Kisha, T.J., Evans, M.A. 2007. Characterizing Safflower Germplasm with AFLP Molecular Markers. Crop Science. 47:1728-1736.
Carbon Isotope Discrimination, Selection Response, and Forage Production of Tall Fescue in Contrasting Environments Reprint Icon - (Abstract Only)
Johnson, R.C., Hopkins, A.A. 2007. Carbon Isotope Discrimination, Selection Response, and Forage Production of Tall Fescue in Contrasting Environments. ASA-CSSA-SSSA Annual Meeting Abstract 279-6.
Development of Kentucky Bluegrass for Non-Burn Seed Production - (Abstract Only)
Johnston, W.J., Johnson, R.C., Golob, C.T., Nelson, M.C., Pare, K., Dobson, K. 2007. Development of Kentucky Bluegrass for Non-Burn Seed Production. ASA-CSSA-SSSA Annual Meeting Abstract 71-13.
Insect Pollination in the Regeneration of Germplasm at the Western Regional Plant Introduction Station - (Proceedings)
Clement, S.L., Hellier, B.C., Elberson, L.R., Bradley, V.L., Johnson, R.C. 2007. Insect Pollination in the Regeneration of Germplasm at the Western Regional Plant Introduction Station. Proceedings 9th International Pollination Symposium on Plant-Pollinator Relationships, Diversity in Action. Iowa State University, Ames, Iowa. p. 62-63.
Temperate forage legume and grass genetic resources: capitalizing on the U.S. germplasm system - (Proceedings)
Greene, S.L., Bradley, V.L., Johnson, R.C. 2006. Temperate forage legume and grass genetic resources: capitalizing on the U.S. germplasm system. Meeting Proceedings.
Using Prevosti's Distance Coefficient for Direct Statistical Analysis of Population Differences - (Abstract Only)
Kisha, T.J., Johnson, R.C., Skinner, D.Z., Greene, S.L. 2006. Using prevosti's distance coefficient for direct statistical analysis of population differences [abstract]. HortScience. 44(4):967-698.
Collecting Taper Tip Onion (Allium Acuminatum HOOK.) in the Great Basin Using Traditional and GIS Methods. - (Peer Reviewed Journal)
Adair, R., Johnson, R.C., Hellier, B.C., Kaiser, W. 2006. Collecting taper tip onion (allium acuminatum hook.) in the great basin using traditional and gis methods. Native Plant Journal. 7:141-148.
Autumn Growth and Its Relationship to Winter Survival in Diverse Safflower Germplasm - (Peer Reviewed Journal)
Johnson, R.C., Dajue, L., Bradley, V.L. 2006. Autumn growth and its relationship to winter survival in diverse safflower germplasm. Canadian Journal of Plant Science. 86:701-732.
Confining Safflower Pollen During Regeneration of Germplasm Seed Stocks - (Proceedings)
Johnson, R.C. 2005. Confining safflower pollen during regeneration of germplasm seed stocks. In: Workshop on the confinement of genetically engineered crops during field testing, September 13-15, 2004, USDA-APHIS Headquaters.
Variation In Winter Hardiness Among Safflower Accessions - (Proceedings)
Johnson, R.C., Dajue, L., Foiles, C.L., Bradley, V.L. 2005. Variation In Winter Hardiness Among Safflower Accessions. In: Proceedings of the 6th International Safflower Conference, June 6-10, 2005, Istanbul, Turkey. p. 113-118.
Characterizing Safflower Germplasm with AFLP Molecular Markers Reprint Icon - (Proceedings)
Johnson, R.C., Kisha, T.J., Foiles, C.L., Bradley, V.L. 2006. Characterizing Safflower Germplasm with AFLP Molecular Markers. In Proceedings of the 6th International Safflower Conference, June 6-10, 2005, Istanbul, Turkey. p. 3-8.
Characterization of a USDA Kentucky Bluegrass (Poa Pratensis L.) Core Collection for Reproductive Mode and DNA Content by Flow Cytometry - (Peer Reviewed Journal)
Wieners, R.R., Fei, S., Johnson, R.C. 2006. Characterization of a usda kentucky bluegrass (poa pratensis l.) core collection for reproductive mode and dna content by flow cytometry. Genetic Resources and Crop Evolution. doi:10.1007/s10722-005-7766-0.
Characterizing Safflower Germplasm with Aflp Molecular Markers Reprint Icon - (Abstract Only)
Johnson, R.C., Kisha, T.J., Foiles, C.L., Bradley, V.L. 2005. Characterizing safflower germplasm with aflp molecular markers [abstract]. Crop Science Society of America. p. 5459.
Variance of Molecular Genetic Distances among Alfalfa Synthetic Populations by Marker Type - (Abstract Only)
Kisha, T.J., Johnson, R.C., Skinner, D.Z., Bauchan, G.R., Greene, S.L. 2004. Variance of molecular genetic distances among alfalfa synthetic populations by marker type. Agronomy Abstracts. #5781.
Confining Safflower Pollen During Regeneration of Germplasm Seed Stocks - (Abstract Only)
Johnson, R.C. 2005. Confining safflower pollen during regeneration of germplasm seed stocks [abstract]. USDA APHIS Headquarters Workshop on the Confinement of Genetically Engineered Crops during Field Testing September 13-15, 2004 Agenda and Abstracts, Insect Pollinated Crops.
Regional Climatic Characterization of Pacific Northwest, Usa, Green-Type Poa Annua - (Peer Reviewed Journal)
Poole, G.J., Johnson, W.J., Johnson, R.C. 2005. Regional climatic characterization of pacific northwest, usa, green-type poa annua. International Turfgrass Society Reseach Journal. 10:565-571
Breeding Non-Flowering Orchardgrass - (Abstract Only)
Casler, M.D., Barker, R.E., Cherney, J.H., Papadopolous, Y.A., Johnson, R.C., Jenderek, M.M. 2004. Breeding non-flowering orchardgrass [abstract]. ASA-CSSA-SSSA Annual Meeting Abstracts. Paper No. 4380.
Effect of Seed Sampling Method During Regeneration on Genetic Population Structure and Growth of Model Ryegrass Populations. - (Peer Reviewed Journal)
Johnson, R.C., Bradley, V.L., Evans, M.A. 2006. Effect of seed sampling method during regeneration on genetic population structure and growth of model ryegrass populations. Plant Genetic Resources Newsletter. 144:1-7.
Inflorescence Sampling Improves Effective Population Size of Grasses - (Peer Reviewed Journal)
Johnson, R.C., Bradley, V.L., Evans, M.A. 2004. Inflorescence sampling improves effective population size of grasses. Crop Science. v. 44. p. 1450-1455.
Regenerating Grass Germplasm: Choosing the Right Compromise - (Proceedings)
Johnson, R.C., Bradley, V.L., Foiles, C.L. 2004. Regenerating grass germplasm: choosing the right compromise. Grass Breeders Work Planning Conference Proceedings.
Characterization and Enhancement of the USDA-ARS Kentucky Bluegrass Collection. - (Proceedings)
Johnson, R.C., Johnston, W.J., Golob, C.T. 2004. Evaluating genetic resources for sustainable production of poa pratensis. Grass Breeders Work Planning Conference Proceedings.
Evaluation and Enhancement of Kentucky Bluegrass Genetic Resources for Sustainable Production - (Other)
JOHNSON, R.C., JOHNSTON, W.J., GOLOB, C.T., BERTOLI, F.B., NELSON, M.C., KISHA, T.J. EVALUATION AND ENHANCEMENT OF KENTUCKY BLUEGRASS GENETIC RESOURCES FOR SUSTAINABLE PRODUCTION. ASA-CSSA-SSSA ANNUAL MEETING ABSTRACTS. 2003. p. 916495.
Agronomic and Molecular Evaluation of Kentucky Bluegrass Germplasm Collected in Italy - (Other)
BERTOLI, F.B., JOHNSON, R.C., LUCARONI, B., ROMANI, M., RUSSI, L., PIANO, E., FALCINELLI, M. AGRONOMIC AND MOLECULAR EVALUATION OF KENTUCKY BLUEGRASS GERMPLASM COLLECTED IN ITALY. 2003.
Determination of Reproductive Mode and Genome Size of a USDA Core Collection of Kentucky Bluegrass (Poa Pratensis L.) by Cell Flow Cytometry - (Other)
WIENERS, R.R., FEI, S., JOHNSON, R.C. DETERMINATION OF REPRODUCTIVE MODE AND GENOME SIZE OF A USDA CORE COLLECTION OF KENTUCKY BLUEGRASS (POA PRATENSIS L.) BY CELL FLOW CYTOMETRY. ASA-CSSA-SSSA ANNUAL MEETING ABSTRACTS. 2003. p. 123246
Residue Management, Seed Production, Crop Development, and Turf Quality in Diverse Kentucky Bluegrass Germplasm - (Peer Reviewed Journal)
JOHNSON, R.C., JOHNSTON, W.J., GOLOB, C.T. RESIDUE MANAGEMENT, SEED PRODUCTION, CROP DEVELOPMENT, AND TURF QUALITY IN DIVERSE KENTUCKY BLUEGRASS GERMPLASM. CROP SCIENCE. 2003. v. 43. p. 1091-1099.
Residue Management, Seed Production, Crop Development and Turf Quality in Diverse Kentucky Bluegrass Germplasm - (Peer Reviewed Journal)
Johnson, R.C., Johnston, W.J., Golob, C.T. 2003. Residue Management, Seed Production, Crop Development, and Turf Quality in Diverse Kentucky Bluegrass Germplasm. Crop Science. v. 43. p. 1091-1099.
Molecular Variation among and Within Diverse Kentucky Bluegrass Germplasm - (Other)
BERTOLI, F.B., JOHNSON, R.C., KISHA, T.J., JOHNSTON, W.J. MOLECULAR VARIATION AMONG AND WITHIN DIVERSE KENTUCKY BLUEGRASS GERMPLASM. Molecular Breeding of Forage and Turf Conference. 2003. p. 141
The Identification of Duplicate Accessions Within a Grass Germplasm Collection Using Rapd Analysis. - (Other)
Bradley, V.L., Kisha, T.J., Johnson, R.C. 2002. The identification of duplicate accessions within a grass germplasm collection using rapd analysis [abstract]. Crop Science Society of America. p. 131923.
Incidence of Introgression Between Cultivated Alfalfa and Wild Relatives in Northwestern Kazakhstan. - (Abstract Only)
Greene, S.L., Kisha, T.J., Johnson, R.C. 2002. Incidence of introgression between cultivated alfalfa and wild relatives in northwestern Kazakhstan [abstract]. Crop Science Society of America. p. 173749.
Seed Sampling Techniques and Diversity Maintenance in Outcrossing Grass Species - (Other)
Johnson, R.C., Bradely, V.L., Evans, M.A. Seed sampling techniques and divserity maintenance in outcrossing grass species. Crop Science Society of America. 2002. Abstract p. 182030.
Evaluation and Characterization of Germplasm: An Example Using Poa Pratensis - (Proceedings)
Johnson, R.C., Johnston, W.J., Golob, C.T., Soreng, R.J. Evaluation and Characterization of Germplasm: An example using Poa pratensis. Proceeding Second International Sustainable Agriculture Conference for Food, Energy, and Industry. Beijing, China. 2002. p. 1051-1057.
Evaluating Genetic Resources for Sustainable Production of Poa Pratensis - (Proceedings)
Johnson, R.C., Johnston, W.J., Golob, C.T. Evaluating genetic resources for sustainable production of Poa pratensis. Proceeding Second International Sustainable Agriculture Conference for Food, Energy, and Industry. Beijing, China. 2002. p. 1058-1064.
Reduction in Effective Population Size During Grass Regeneration and Improvements with Sampling - (Peer Reviewed Journal)
Johnson, R.C., Bradley, V.L., Evans, M.A. Reductions in effective populations size during grass regeneration and improvements with sampling. Crop Science. 2002. v. 42. p. 286-290.
Variances of Genetic Distance Measurements among Alfalfa Accessions Compared from Several Molecular Marker Types - (Other)
Kisha, T.J., Johnson, R.C., Skinner, D.Z., Greene, S.L. Variances of genetic distance measurements among alfalfa accessions compared from several molecular marker types. Crop Science Society of America. 2002. Abstract p. 175620.
Seed Production of Diverse Kentucky Bluegrass Germplasm with Various Residue Management Systems - (Other)
Johnston, W.J., Johnson, R.C., Golob, C.T., Sitton, J.W. Seed production of diverse Kentucky bluegrass germplasm with various residue management systems. Crop Science Society of America. 2002. Abstract p. 145953.
Evaluation of the USDA Core Safflower Collection for Seven Quantitative Traits - (Proceedings)
Johnson, R.C., P.B. Ghorpade, and V.L. Bradley. 2001. Evaluation of the USDA core safflower collection for seven quantitative traits. Proceedings of the Vth International Safflower Conference, Williston, North Dakota, Sidney, Montana, USA. 2001. p. 149-152.
Managing the U.S. Safflower Collection - (Proceedings)
Bradley, V.L., Johnson, R.C. Managing the U.S. safflower collection. In Proceedings of the Vth International Safflower Conference, Williston, North Dakota, Sidney, Montana, USA. 2001. p. 143-147
Characterization of the USDA Poa Pratensis Collection Using Rapd Markers and Agronomic Descriptors - (Peer Reviewed Journal)
Johnson, R.C., Johnston, W.J., Golob, C.T., Nelson, M.C., Soreng, R.J. 2002. Characterization of the usda poa pratensis collection using rapd markers and agronomic descriptors. Genetic Resources and Crop Evolution. 49:349-361.
An Assessment of Grass Regeneration Nurseries at the Western Regional Plant Introduction Station - (Proceedings)
Bradley, V.L., Johnson, R.C. An assessment of grass regeneration nurseries at the Western Regional Plant Introduction Station, 1994-1997. In Proceedings of the XIX International Grasslands Congress, Sao Pedro, Sao Paulo, Brasil. 2001. p. 883-884.
Improving Effective Population Size During Grass Seed Regeneration - (Other)
Johnson, R.C., Bradley, V.L., Evans, M.A. Improving efffective population size during grass seed regeneration. Crop Science Society of America. 2001. Abstract p. 144248.
Comparison of Molecular Marker Types for Characterization of Alfalfa Accessions - (Other)
Kisha, T.J., R.C. Johnson, D.Z. Skinner, and S.L. Greene. Comparison of molecular markers types for characterization of alfalfa accessions. Crop Science Society of America. 2001. Abstract p. 200136
Diversity of Greens-Type Annual Bluegrass in the Pacific Northwest - (Other)
Poole, G.J., Johnston, W.J., Johnson, R.C. Diversity of greens-type annual bluegrass in the Pacific Northwest. Crop Science Society of America. 2001. Abstract p. 151948.
Poa Annua Diversity on Golf Course Greens in the Pacific Northwest, Usa - (Peer Reviewed Journal)
Poole, G.J., Johnston, W.J., Johnson, R.C. Poa annua diversity on golf course greens in the Pacific Northwest, USA. International Turfgrass Science Journal. 2001. v.9.p.192-197.
Medics (Medicago L.) - (Other)
Prosperi, J-M., Auricht, G.C., Genier, G., Johnson, R.C. Medics (Medicago L.) In N. Maxted and S. Bennett (ed.) Plant Genetic Resources of Legumes in the Mediterranean. Kluwer, Dordrecht, the Netherlands. 2001. p. 99-114.
Medics (Medicago L.) - (Other)
Prosperi, J-M., Auricht, G.C., Genier, G., Johnson, R.C. Medics(Medicago L.) In N. Maxted and S. Benett (ed.) Plant Genetic Resources of Legumes in the Mediterranean. Kluwer, Dordrecht, the Netherlands. 2001. p. 99-114.
Variation in Annual Bluegrass on Pacific Northwest Golf Greens - (Abstract Only) - (01-Nov-00)
Washington State and USDA Work to Preserve and Clarify the Rich Diversity of Kentucky Bluegrass. - (Popular Publication) - (01-Sep-00)
Seed Production and Turfgrass Quality Evaluation of Diverse Kentucky Bluegrass Germplasm Utilizing Core Subsets. - (Proceedings) - (01-Sep-00)
The Genetic Resources of the Genus Medicago - (Book / Chapter) - (01-Aug-00)
Effective Population Size Reduction Associated with Fecundity Variation in Grasses - (Peer Reviewed Journal)
Johnson, R.C., Bradley, V.L. 2000. Effective population size reduction associated with fecundity variation in grasses. Crop Science. 42:286-290.
Establishment of a New Crop Registration Category Mapping Populations - (Other)
Ullrich, S.E., Johnson, R.C., Muehlbauer, F.J., Wiesner, L.E. 2000. Establishment of a new crop registration category mapping populations. Crop Science. 40:1189-1190.
Comparing Poa Pratensis L. Core Collections Developed Using Agronomic and Rapd Data - (Abstract Only) - (01-Dec-99)
Seed Production and Turf Quality of the USDA Kentucky Bluegrass Core Collection - (Abstract Only) - (01-Nov-99)
Powdery Mildew Caused by An Odium Sp. on Twenty-One Annual Medicago Spp. in California. - (Research Notes) - (01-Nov-99)
Safflower Germplasm Collection Directory - (Other) - (01-Jun-99)
Core Collections for Today and Tomorrow - (Book / Chapter)
Johnson, R.C., Hodgkin, T. 1999. Core collections for today and tomorrow. Rome, Italy:International Plant Genetic Resource Institute.
Core Utilization and Development: An Example with Poa Pratensis L. - (Book / Chapter)
Johnson, R.C., Johnston, W.J., Nelson, M.C., Simon, C.J., Golob, C.T. 1999. Core utilization and development: an example with poa pratensis l. In: Johnson, R.C. and Hodgkin, T. editors. Core Collections for Today and Tomorrow. Rome, Italy: ICGRI. p. 49-60.
Kentucky Bluegrass Core Development and Utilization - (Abstract Only) - (18-Oct-98)
Overview and Agronomic Evaluation of the USDA Annual Medic Germplasm Collection - (Abstract Only) - (01-Aug-98)
Selection Response of Tall Fescue Germplasm to Water Use Efficiency - (Abstract Only) - (01-Sep-97)
Conservation of Grass Collections at the Western Regional Plant Introduction Station - (Proceedings) - (01-May-97)
Phenotyhpic Evaluation of Poa Pratensis L.: Usda/ars Plant Introduction Germplasm Collection - (Peer Reviewed Journal) - (01-May-97)
Evaluation of Safflower Accessions for Oil and Meal Quality Factors - (Proceedings) - (01-Apr-97)
Regeneration Sampling and Genetic Profiles of Ryegrass Accessions - (Abstract Only) - (01-Sep-96)
Expression of Russian Wheat Aphid Resistance in Genotypes of Tall Fescue Haboring Different Isolates of Acremonium Endophyte - (Peer Reviewed Journal) - (14-Dec-95)
Last Modified: 4/25/2013
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