College of Agricultural, Human, and Natural Resource Sciences

Department of Plant Pathology

Long-Xi Yu

Research Plant Geneticist
USDA ARS/ Adjunct Professor

Research Specialty and Interest

Dr. Yu’s lab is interested in applying genomic tools for enhancing resistance to biotic and abiotic stress in forage crops. His current research has been focused on genome-wide association studies (GWAS) of resistance to soil-borne diseases and stem nematode in alfalfa using genotyping by sequencing (GBS).  Drought and salt tolerance, and enhanced water use efficiency are also investigated in his group using forward or reverse genetics. Molecular markers and high throughput strategies will be developed and used in marker-assisted breeding to develop improved forage varieties with resistance to disease and abiotic stresses.


  • Postdoc, Department of Plant Biology, Cornell University, Ithaca NY
  • Ph.D. in Plant Molecular Biology, University of Orleans, France
  • Certificate of Professional Achievement in Plant Biology, Zhongshan University, Guangzhou
  • BS in Agricultural Science, Hunan Agricultural University, Changsha, China

Selected Publications

  • Yu L-X*, Zheng P, Zhang T, Rodringuez J, Main D (2016) Genotyping-by-sequencing based genome-wide association studies on Verticillium wilt resistance in autotetraploid alfalfa (Medicago sativa). Mol. Plant Pathol. 2016 Mar 2. doi: 10.1111/mpp.12389.
  • Yu L-X*, Liu X, Boge W and Liu X-P (2016) Genome-Wide Association Study Identifies Loci for Salt Tolerance during Germination in Autotetraploid Alfalfa (Medicago sativa) Using Genotyping-by-Sequencing. Front. Plant Sci. 7:956. doi: 10.3389/fpls.2016.00956.
  • Yu L-X*, Zheng P, Bhamidimarri S, Liu X -P and Main D (2017) The impact of genotyping-by-sequencing pipelines on snp discovery and identification of markers associated with verticillium wilt resistance in autotetraploid alfalfa (Medicago sativa). Front. Plant Sci. 8:89. doi: 10.3389/fpls.2017.00089.
  • Yu L-X*, Chao S, Singh PR, Sorrells EM (2017) Identification and validation of single nucleotide polymorphic markers linked to ug99 stem rust resistance in spring wheat. PLoS ONE 12 (2): e0171963. doi:10.1371/journal.pone.0171963.
  • Yu L-X* and Setter TL. (2015) Comparative transcriptomes between viviparous1 and wildtype maize developing endosperms in response to water deficit. Env. Exp. Botany. DOI: 10.1016/j.envexpbot.2015.11.009
  • Zhang T, Yu L-X*, Zheng P, Li Y, Rivera M, Main D and Greene S (2015) Identification of Loci Associated with Drought Resistance Traits in Heterozygous Autotetraploid Alfalfa (Medicago sativa L.) Using Genome-Wide Association Studies with Genotyping by Sequencing. PLoS ONE 10(9): e0138931. doi:10.1371/journal.pone.0138931
  • Zhang T, Yu L-X*, McCord P, Miller D, Bhamidimarri S, et al. (2014) Identification of Molecular Markers Associated with Verticillium Wilt Resistance in Alfalfa (Medicago Sativa L.) Using High-Resolution Melting. PLoS ONE 9(12): e115953. doi:10.1371/journal.pone.0115953
  • Yu L-X, Barbier H., Rouse M., Singh S., Singh R., Bhvanani S., Huerta-Espino J., Sorrells M. (2014) A Consensus Map for Ug99 Stem Rust Resistance Loci in Wheat. Theor Appl Genet 127:1561–1581, DOI 10.1007/s00122-014-2326-7.
  • Yu L-X, Shen X, Setter LT (2014) Molecular and functional characterization of two drought-induced zinc finger proteins, ZmZnF1 and ZmZnF2 from maize kernels. Env Exp. Bot. DOI: 10.1016/j.envexpbot.2014.10.004.http: Online @
  • Yu L-X, Parthasarathy MV (2014) Molecular and Cellular Characterization of the Tomato Pollen Profilin, LePro1. PLoS ONE 9(1): e86505, doi:10.1371/ journal.pone.0086505
  • Yu L-X, Morgounov A, Wanyera R, Keser M, Singh SK and Sorrells M (2012) Identification of Ug99 Resistance loci in Winter Wheat Germplasm Using Genome-Wide Association Analysis Theor Appl Genet 125:749-758, DOI 10.1007/s00122-012-1867-x
  • Yu L-X, BG. Dzikovski, JH. Freed (2012) A Protocol for Detecting and Scavenging Gas-phase Free Radicals in Mainstream Cigarette Smoke. Journal of Visualized Experiments, 2012; (59) e3406, DOI: 10.3791/3406
  • Kulwal P, Ishikawa G, Benscher D, Feng Z, Yu L-X, Jadhav A, Mehetre S, and Sorrells M (2012) Association Mapping for Pre-harvest Sprouting Resistance in White Winter Wheat. Theor Appl Genet 125:793-805, DOI 10.1007/s00122-012-1872-0
  • Yu L-X, Lorenz A, Rutkoski J, Singh RP, Bhavani S, Huerta-Espino J, Sorrells ME (2011) Association Mapping and Gene-Gene Interaction for Stem Rust Resistance in Spring Wheat Germplasm. Theor Appl Genet 123: 1257-1268, DOI 10.1007/s00122-011-1664-y.
  • Dasheng Xiong, Long-Xi Yu, Xiao Yan, Chunqiu Guo, Ying Xiong (2011) Effects of Root and Stem Extracts of Asparagus cochinchinensis on Biochemical Indicators Related to Aging in the Brain and Liver of Mice, The American Journal of Chinese Medicine. 39: (4) 719-726.
  • Yu L-X, Liu S, Anderson JA, Singh RP, Jin Y, Dubcovsky J, Brown-Guidera G, Bhavani S, Morgounov A, He Z, Huerta-Espino J, Sorrells ME (2010) Haplotype diversity of stem rust resistance loci in uncharacterized wheat lines. Mol Breeding, 26:667-680, DOI: 10.1007/s11032-010-9403-7
  • Liu S., Yu L.-X., Singh R.P., Jin Y., Sorrells M.E. and Anderson J.A. (2010) Diagnostic and co-dominant PCR markers for wheat stem rust resistance genes Sr25 and Sr26. Theor Appl Genet 120:691–697.
  • Yu L-X, Z. Abate, J. A. Anderson UK Bansal, HS Bariana, S. Bhavani, J. Dubcovsky, E. S Lagudah, S. Liu, PK Sambasivam R. P Singh and M. E Sorrells (2009) Developing and Optimizing Markers for Stem Rust Resistance in Wheat. Proceedings of Borlaug Global Rust Initiative C.D. Obregon, Mexico, 2009:1-21.
  • Yu L-X, Gray BN., Rutzke CJ., Walker LP., Wilson DB. and Hanson MR. (2007) Expression of Thermostable Microbial Cellulases in the Chloroplasts of Nicotine-Free Tobacco. Journal of Biotechnology 131: (3) 362-369.
  • Melkonian J., Yu L.-X. and Setter T.L. (2004) Chilling responses of maize (Zea mays L.) seedlings: root hydraulic conductance, abscisic acid, and stomatal conductance. Journal of Experimental Botany 55: 1751-1760
  • Yu L-X and Setter T.L. (2003) Comparative transcriptional profiling of placenta and endosperm in response to water deficit. Plant Physiol., 131:568-582.

Adjunct Professor Long-Xi Yu

Room 118, Hamilton Hall
24016 N Bunn Rd
Prosser, WA 99350

Tel: 509-786-9259
Fax: 509-786-9277


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