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United States Department of Agriculture

Agricultural Research Service

Related Topics

Ivan Simko
Crop Improvement and Protection Research
Research Geneticist (Plants)

Phone: (831) 755-2862
Fax: (831) 755-2814

1636 E ALISAL ST
SALINAS, CA, 93905

Projects
Genetic Enhancement of Lettuce, Spinach, Melon, and Related Species
Appropriated (D)
  Accession Number: 424945
Lettuce Breeding and Genetics
Trust (T)
  Accession Number: 426665

Publications (Clicking on the reprint icon Reprint Icon will take you to the publication reprint.)
Characterization and performance of 16 new inbred lines of lettuce - (Peer Reviewed Journal)
Simko, I., Hayes, R.J., Bull, C.T., Mou, B., Luo, Y., Trent, M.A., Atallah, A.J., Ryder, E.J., Sideman, R.G. 2014. Characterization and performance of 16 new inbred lines of lettuce. HortScience. 49:679-687.
Notice of release of iceberg, romaine, and leaf lettuce breeding lines with improved disease resistance - (Germplasm Registration)
Simko, I., Hayes, R.J. 2014. Notice of release of iceberg, romaine, and leaf lettuce breeding lines with improved disease resistance. Germplasm Release. Available: http://calgreens.org/wp-content/uploads/2014/03/USDA-Releases-Sixteen-New-Breeding-LInes-of-Lettuce1.pdf.
QTL mapping, association mapping and marker assisted breeding in lettuce - (Proceedings)
Simko, I. 2014. QTL mapping, association mapping and marker assisted breeding in lettuce. American Seed Trade Association Conference, January 23-27, 2014, Monterey, California. Available: http://biodiagnostics.net/wp-content/uploads/2014/04/Dr.-Simko-ASTA-on-Lettuce-breeding-strategies-2014.pdf.
Development of a high-density intra-specific linkage map of lettuce using genotyping by sequencing (GBS) - (Proceedings)
Galeano, C.H., Froenicke, L., Duitama, J., Kozik, A., Reyes-Chin-Wo, S., Simko, I., Hayes, R.J., Michelmore, R. 2014. Development of a high-density intra-specific linkage map of lettuce using genotyping by sequencing (GBS). Plant and Animal Genome XXII Conference, January 11-15, 2014, San Diego, California. P686.
Baby leaf lettuce germplasm enhancement: developing diverse populations with resistance to bacterial leaf spot caused by Xanthomonas campestris pv. vitians - (Peer Reviewed Journal)
Hayes, R.J., Trent, M.A., Mou, B., Simko, I., Gebben, S.J., Bull, C.T. 2014. Baby leaf lettuce germplasm enhancement: developing diverse populations with resistance to bacterial leaf spot caused by Xanthomonas campestris pv. vitians. HortScience. 49:18–24.
Identification of QTLs conferring resistance to downy mildew in legacy cultivars of lettuce - (Peer Reviewed Journal)
Simko, I., Atallah, A.J., Ochoa, O., Antonise, R., Galeano, C., Truco, M.J., Michelmore, R. 2013. Identification of QTLs conferring resistance to downy mildew in legacy cultivars of lettuce. Scientific Reports. DOI:10.1038/srep02875.
Genome-wide association of 10 horticultural traits with expressed sequence tag-derived SNP markers in a collection of lettuce lines - (Peer Reviewed Journal)
Kwon, S.J., Simko, I., Hellier, B.C., Mou, B., Hu, J. 2013. Genome-wide association of 10 horticultural traits with expressed sequence tag-derived SNP markers in a collection of lettuce lines. The Crop Journal. 1(1):25-33. DOI: 10.1016/j.cj.2013.07.014.
Yield gains in leafy vegetables - (Book / Chapter)
Simko, I., Hayes, R.J., Mou, B., McCreight, J.D. 2014. Yield gains in leafy vegetables. In: Smith, S., Diers, B., Specht, J., Carver, B., editors. Yield gains in major U.S. field crops. CSSA Special Publications 33. Madison, WI: American Society of Agronomy, Inc., Crop Science Society of America, Inc., and Soil Science Society of America, Inc. p. 53-86.
Evaluation and Quantitative trait loci mapping of resistance to powdery mildew in lettuce - (Peer Reviewed Journal)
Simko, I., Rauscher, G., Sidemann, R., McCreight, J.D., Hayes, R.J. 2013. Evaluation and Quantitative trait loci mapping of resistance to powdery mildew in lettuce. Plant Pathology. DOI: 10.1111/ppa.12087.
Development of genomic SSR markers for fingerprinting lettuce (Lactuca sativa L.) cultivars and mapping genes - (Peer Reviewed Journal)
Rauscher, G., Simko, I. 2013. Development of genomic SSR markers for fingerprinting lettuce (Lactuca sativa L.) cultivars and mapping genes. BMC Plant Biology. 13:11.
Marker-assisted selection for disease resistance in lettuce - (Book / Chapter)
Simko, I. 2013. Marker-assisted selection for disease resistance in lettuce. In: Varshney, R.K., Tuberosa, R., editors. Translational genomics for crop breeding. Vol. I: Biotic stresses. Ames, IA: John Wiley & Sons, Inc. p. 267-289.
Audpc and Audps: What Is the Difference? - (Abstract Only)
Simko, I., Piepho, H. 2012. AUDPC and AUDPS: What is the Difference? Phytopathology. 102:S4.110.
Environmental factors contributing to development of lettuce dieback disease and genomic characterization of lettuce necrotic stunt virus - (Abstract Only)
Wintermantel, W.M., Simko, I. 2012. Environmental factors contributing to development of lettuce dieback disease and genomic characterization of lettuce necrotic stunt virus. Phytopathology. 102:S4.136.
Computing Integrated Ratings from Heterogeneous Phenotypic Assessments: A Case Study of Lettuce Postharvest Quality and Downy Mildew Resistance - (Peer Reviewed Journal)
Simko, I., Hayes, R.J., Kramer, M.H. 2012. Computing integrated ratings from heterogeneous phenotypic assessments: A case study of lettuce postharvest quality and downy mildew resistance. Crop Science. 52:2131-2142.
Empirical evaluation of DArT, SNP, and SSR marker-systems for genotyping, clustering, and assigning sugar beet hybrid varieties into populations - (Peer Reviewed Journal)
Simko, I., Eujayl, I.A., Van Hintum, Jl, T. 2012. Empirical evaluation of DArT, SNP, and SSR marker-systems for genotyping, clustering, and assigning sugar beet hybrid varieties into populations. Plant Science. 184:54-62.
The area under the disease progress stairs: calculation, advantage, and application - (Peer Reviewed Journal)
Simko, I., Piepho, H. 2012. The area under the disease progress stairs: calculation, advantage, and application. Phytopathology. 102:381-389.
Developing lettuce with improved quality for processed salads. - (Abstract Only)
Hayes, R.J., Truco, M.J., Mchale, L.K., Michelmore, R.W., Antonise, R., Hand, P., Simko, I. 2011. Developing lettuce with improved quality for processed salads. Eucarpia Conference on Lettuce and Leafy Vegetables. August 24, 2011, Lille, France.
Mapping dominant negative mutation for triforine sensitivity in lettuce and its use as a selectable marker for detecting hybrids. - (Peer Reviewed Journal)
Simko, I., Hayes, R.J., Truco, M.J., Michelmore, R.W. 2011. Mapping dominant negative mutation for triforine sensitivity in lettuce and its use as a selectable marker for detecting hybrids. Euphytica. 182(2):157-166.
Combining phenotypic data from ordinal rating scales in multiple plant experiments - (Peer Reviewed Journal)
Simko, I., Piepho, H. 2011. Combining phenotypic data from ordinal rating scales in multiple plant experiments. Trends in Plant Science. 16:235-237.
Application of Hi-Res Melting Approach for Mapping Resistance Genes and Marker-assisted Selection in Lettuce - (Other)
Simko, I. 2011. Application of Hi-Res Melting Approach for Mapping Resistance Genes and Marker-assisted Selection in Lettuce. Plant and Animal Genome Conference. Online.
Iceberg lettuce breeding lines with resistance to Verticillium wilt caused by race 1 isolates of Verticillium dahliae. - (Peer Reviewed Journal)
Hayes, R.J., Maruthachalam, K., Vallad, G.E., Klosterman, S.J., Simko, I., Luo, Y., Subbarao, K.V. 2011. Iceberg lettuce breeding lines with resistance to Verticillium wilt caused by race 1 isolates of Verticillium dahliae. HortScience. 46(3):501-504.
Evaluation of the RPi-ber late blight resistance gene for tuber resistance in the field and laboratory. - (Peer Reviewed Journal)
Mayton, H., Rauscher, G., Simko, I., Fry, W. 2011. Evaluation of the RPi-ber late blight resistance gene for tuber resistance in the field and laboratory. Plant Breeding. 130:464-468.
Combining partially ranked data in plant breeding and biology: I. Rank aggregating methods. - (Peer Reviewed Journal)
Simko, I., Pechenick, D.A. 2010. Combining partially ranked data in plant breeding and biology: I. Rank aggregating methods.. Communications in Biometry and Crop Science (CBCS), Year 2010, volume 5, pages 41-55.
Combining partially ranked data in plant breeding and biology: II. Analysis with Rasch model. - (Peer Reviewed Journal)
Simko, I., Lincare, J.M. 2010. Combining partially ranked data in plant breeding and biology: II. Analysis with Rasch model.. Communications in Biometry and Crop Science (CBCS). 2010, Vol 5, Pages 56-65.
Sm09a and Sm09b: Romaine Lettuce Breeding Lines Resistant to Dieback and with Improved Shelf-Life. - (Peer Reviewed Journal)
Simko, I., Hayes, R.J., Subbarao, K.V., Sideman, R.G. 2010. SM09A and SM09B: Romaine Lettuce Breeding Lines Resistant to Dieback and with Improved Shelf-life.. HortScience,Year 2010, volume 45, pages 670-672.
Association mapping and marker-assisted selection of the lettuce dieback resistance gene Tvr1. - (Peer Reviewed Journal)
Simko, I., Pechenick, D.A., Mchale, L.K., Truco, M.J., Ochoa, O.E., Michelmore, R.W., Scheffler, B.E. 2009. Association mapping and marker-assisted selection of the lettuce dieback resistance gene Tvr1.. Biomed Central (BMC) Plant Biology, Year 2009, volume 9, article number 135.
Development of molecular markers for marker-assisted selection in lettuce (Lactuca sativa). - (Peer Reviewed Journal)
Simko, I., Pechenick, D.A., Mchale, L.K., Truco, M.J., Ochoa, O.E., Michelmore, R.W., Scheffler, B.E. 2010. Development of molecular markers for marker-assisted selection in lettuce (Lactuca sativa). Acta Horticulture Proceedings, Year 2010, volume 859, pages 401-408.
QTL mapping of resistance to Powdery Mildew in lettuce. Reprint Icon - (Abstract Only)
Rauscher, G.M., Hayes, R.J., Simko, I. 2009. QTL mapping of resistance to Powdery Mildew in lettuce. Phytopathology 99:S107.
Development of molecular markers for marker-assisted selection in lettuce (Lactuca sativa). - (Abstract Only) - (18-May-09)
Foliar and Tuber Blight Resistance in a Solanum Tuberosum Breeding Lines. - (Review Article)
Mayton, H., Griffiths, H., Simko, I., Cheng, S., Lorenzen, J., De Jong, W., Fry, W.E. 2009. FOLIAR AND TUBER BLIGHT RESISTANCE IN A SOLANUM TUBEROSUM BREEDING LINES.. Plant Breeding.DOI:10.1111/J.1439-0523.01671.x
Association analysis of beet curly top disease resistant genes in sugarbeet - (Abstract Only)
Eujayl, I.A., Simko, I., Strausbaugh, C.A. 2009. Association analysis of beet curly top disease resistant genes in sugarbeet [Abstract]. Proceedings of 35th Biennial Meeting of American Society of Sugar Beet Technologists: Section B&E. Paper No. 1.
Development of EST-SSR Markers for the Study of Population Structure in Lettuce (Lacutca sativa L.). - (Peer Reviewed Journal)
Simko, I. 2009. Development of EST-SSR Markers for the Study of Population Structure in Lettuce (Lacutca sativa L.). Journal of Heredity 180: 256-262.
Effect of Isolate, Environment and a Defeated R-gene (RPi-ber) on Quantitative Resistance of Potato to Late Blight - (Peer Reviewed Journal)
Rauscher, G.M., Mayton, H., Bonierbale, M., Simko, I., Smart, C., Grunwald, N.J., Fry, W. Effect of Isolate, Environment and a Defeated R-gene (RPi-ber) on Quantitative Resistance of Potato to Late Blight. American Phytopathological Society Annual Meeting, Minneapolis, Minnesota, July 26-July 30. Phytopathology 98:S130.
Mapping Loci for Chlorosis Associated with Chlorophyll B Deficiency in Potato - (Peer Reviewed Journal)
Simko, I., Van Den Berg, J.H., Vreugdenhil, D., Ewing, E.E. 2008. Mapping loci for chlorosis associated with chlorophyll b deficiency in potato. Euphytica Vol 162, Pages 99-107, 2008.
Populations structure in cultivated lettuce (Lactuca sativa L.) and its impact on assocation mapping. - (Peer Reviewed Journal)
Simko, I., Hu, J. Populations structure in cultivated lettuce (Lactuca sativa L.) Journal of the American Society for Horticultural Science, Vol. 133, Pages 61-68, 2008.
Comparison of the two pathogenic systems: Bremia Lactucae on Lactuca, and Phytophthora infestans on Solarum - (Abstract Only)
Simko, I. 2007. Comparison of the two pathogenic systems: Bremia Lactucae on Lactuca, and Phytophthora infestans on Solarum. Downy Mildews 2nd International Symposium. Olomouc, Czech Republic, July 2-7, 2007.
From Association Mapping to Marker-Assisted Selection: Experimental Design and Application. - (Abstract Only)
Simko, I. 2007. From Association Mapping to Marker-Assisted Selection: Experimental Design and Application. Phytopathology 97:S149..
Effect of Population Structure on Association Mapping in Cultivated Lettuce. - (Abstract Only)
Simko, I., Hu, J. 2007. Effect of Population Structure on Association Mapping in Cultivated Lettuce. In Eucarpia Leafy Vegetables 2007 Conference Abstracts. Warwick, UK, April 18-20, 2007.
Foliar and tuber late blight resistance in a Solanum tuberosum potato mapping population - (Abstract Only)
Mayton, H., Simko, I., Dejong, W., Fry, W. 2006. Foliar and tuber late blight resistance in a Solanum tuberosum potato mapping population. American Phytopathological Society Annual Meeting, Quebec City, Canada, July 29-August 2, 2006. Phytopathology 96:S74.
Characterization and Mapping of Rpi-Ber, a Novel Potato Late Blight Resistance Gene from Solanum Berthaultii - (Peer Reviewed Journal)
Rancher, G., Smart, C.D., Simko, I., Bonierbale, M., Mayton, H., Greenland, A., Fry, W.E. 2006. Characterization and mapping of rpi-ber, a novel potato late blight resistance gene from solanum berthaultii. Theoretical and Applied Genetics. 112(4):674-687.
Last Modified: 9/20/2014