Our Scientists

Dr. Lisa Alexander

Research Geneticist
{McMinnville, TN}
Lisa.Alexander@ars.usda.gov

Conducts research to develop, evaluate, and release improved germplasm of selected nursery crop species, including, but not limited to, Hydrangea, Osmanthus, and Callicarpa, and utilize genetic markers to accelerate the breeding process. Click here for more details

Mr. Kevin Conrad

Curator, Woody Landscape Plant Germplasm Repository
{Beltsville, MD}
Kevin.Conrad@ars.usda.gov

Responsible for the conservation of 182 genera (over 5000 taxa) of woody landscape plants of diverse wild-origin; to establish a viable repository (Woody Landscape Plant Germplasm Repository - WLPGR) for the long term preservation of this germplasm in the form of seeds and clonal material; to transfer technology and associated information for use in research and crop improvement; and, to establish, manage, and make available collections information by electronic links between U.S. National Arboretum, National Plant Germplasm System, and the public sector. Click here for more details

Dr. John Hammond

Research Plant Pathologist
{Beltsville, MD}
John.Hammond@ars.usda.gov

Conducts research on virus diseases of ornamental crops, including identification and characterization of newly occurring viruses, resistance to virus infection and replication in transgenic plants, and virus detection and strain differentiation by serology and nucleic acid hybridization. Development of a Universal Plant Virus Microarray for detection and identification of plant viruses. Click here for more details

Dr. Qi Huang

Plant Pathologist
{Beltsville, MD}
Qi.Huang@ars.usda.gov

Identifies, detects, and gains a better understanding of genetic relationships and molecular basis of pathogenicity of selected bacterial pathogens to facilitate effective control of bacterial diseases of major significance to ornamental and agronomic crops. Current research interests include: conducting research on Xylella fastidiosa including genome characterization and specific detection and identification of ornamental strains, as well as genetic relationships among ornamental and non-ornamental strains of X. fastidiosa; and improving current detection and identification methods for the select agent pathogen Ralstonia solanacearum race 3 biovar 2. Click here for more details

Dr. Ramon Jordan

Research Plant Pathologist
{Beltsville, MD}
Ramon.Jordan@ars.usda.gov

Conducts research on the biochemical and biological nature of plant viruses, their genomes, and their gene products. Develops and utilizes serological and nucleic acid-based reagents and technologies for improved detection, differentiation and identification of new and emerging viruses; determines the genome organization of selected important ornamental viruses; and, develops methods and new strategies to confer virus resistance in plants through expression of antibody proteins or replicase-binding peptides in transgenic plants. Click here for more details

Dr. Kathryn K. Kamo

Plant Physiologist
{Beltsville, MD}
Kathryn.Kamo@ars.usda.gov

Identifies biochemical events associated with cell division and differentiation. Studies cell, tissue and organ development and correlates biochemical changes with morphological changes leading to formation of the whole plant. Applies biotechnology to the development of floral bulb plants to make them resistant to viruses and nematodes. Click here for more details

Dr. Margaret Pooler

Research Geneticist
{Beltsville, MD}
Margaret.Pooler@ars.usda.gov

Conducts basic and applied research on breeding and genetics of ornamental shrubs and small trees, including flowering cherries, redbuds, and crapemyrtles, in order to develop new cultivars that are disease and pest resistant, tolerant of environmental stresses, and have superior ornamental qualities. Breeding methodologies include traditional crosses, ploidy manipulation, in-vitro techniques, as well as using molecular markers to identify hybrids or assess genetic diversity. Click here for more details

Dr. Scott Warnke

Research Plant Geneticist/Physiologist
{Beltsville, MD}
Scott.Warnke@ars.usda.gov

Conducts research on the genetics of plants used as turfgrasses. Identifies and develops enhanced germplasm from wild species that express improved biotic and abiotic stress resistance. Develops improved turfgrasses through the use of new technologies such as molecular markers and genomics. Click here for more details

Dr. Alan Whittemore

Research Plant Molecular Taxonomist
{Washington, DC}
Alan.Whittemore@ars.usda.gov

Responsible for original molecular, biosystematic, taxonomic, and nomenclatural research on cultivated woody plants and their wild-occurring allies of potential scientific, economic, and landscape utility. Leads and joins domestic and foreign plant explorations. Responsible for, provides oversight of, and contributes actively to the growth and proper curation of the U.S. National Arboretum Herbarium. Click here for more details