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United States Department of Agriculture

Agricultural Research Service

Adam D Henk
Plant Germplasm Preservation Research Unit
Biological Science Lab Technician

Phone: (970) 495-3208
Fax: (970) 221-1427
1111 S MASON ST
FORT COLLINS, CO, 80521-4500


Publications (Clicking on the reprint icon Reprint Icon will take you to the publication reprint.)
Genetic relationships between wild progenitor pear (Pyrus L.) species and local cultivars native to Georgia, South Caucasus - (Peer Reviewed Journal)
Asanidze, Z., Akhalkatsi, M., Henk, A.D., Richards, C.M., Volk, G.M. 2014. Genetic relationships between wild progenitor pear (Pyrus L.) species and local cultivars native to Georgia, South Caucasus. Flora. 209(9):504-512. DOI: 10.1016/j.flora.2014.06.013.
Application of genetic and spatial analyses to identify collection priorities for wild Malus species - (Abstract Only)
Volk, G.M., Richards, C.M., Henk, A.D., Baldo, A.M., Fazio, G., Chao, C.T. 2014. Application of genetic and spatial analyses to identify collection priorities for wild Malus species [abstract]. 7th International Rosaceae Genomics Conference. p. 84.
Plant shoot tip response to treatment with plant vitrification solution 2 - (Peer Reviewed Journal)
Volk, G.M., Henk, A.D., Bonnart, R.M., Shepherd, A., Gross, B.L. 2014. Plant shoot tip response to treatment with plant vitrification solution 2. Acta Horticulturae. 1039:81-84.
Gene expression in arabidopsis shoot tips after liquid nitrogen exposure - (Abstract Only)
Volk, G.M., Henk, A.D., Bonnart, R.M., Gross, B. 2013. Gene expression in arabidopsis shoot tips after liquid nitrogen exposure. Meeting Abstract. 2nd International Society for Horticultural Science Meeting. p.17.
Diversity captured in the USDA-ARS National Plant Germplasm System apple core collection - (Peer Reviewed Journal)
Gross, B., Volk, G.M., Richards, C.M., Henk, A.D., Forsline, P., Szewc-Mcfadden, A.K., Fazio, G., Chao, C.T. 2013. Diversity captured in the USDA-ARS National Plant Germplasm System apple core collection. Journal of the American Society for Horticultural Science. 138(5):375-381.
Malus sieversii: a diverse Central Asian apple species in the USDA-ARS National Plant Germplasm System - (Peer Reviewed Journal)
Volk, G.M., Henk, A.D., Richards, C.M., Forsline, P.L., Chao, C.T. 2013. Malus sieversii: a diverse Central Asian apple species in the USDA-ARS National Plant Germplasm System. HortScience. 48(12):1440-1444.
Genetic diversity of wild European and Mediterranean pear species - (Abstract Only)
Volk, G.M., Richards, C.M., Henk, A.D., Bassil, N.V., Postman, J.D. 2012. Genetic diversity of wild European and Mediterranean pear species (abstract). 6th Rosaceous Genomics Conference (RGC6). September 30 - October 4, 2012, Trento, Italy. p. 130-131.
Identification of interspecific hybrids among domesticated apple and its wild relatives - (Peer Reviewed Journal)
Gross, B.L., Henk, A.D., Forsline, P.L., Richards, C.M., Volk, G.M. 2012. Identification of interspecific hybrids among domesticated apple and its wild relatives. Tree Genetics and Genomes. (2012)8:1223-1235. Available: DOI 10.1007/s11295-012-0509-4.
Interspecific hybridization among domesticated apple and its wild relatives - (Abstract Only)
Gross, B.L., Henk, A.D., Forsline, P.L., Richards, C.M., Volk, G.M. 2012. Interspecific hybridization among domesticated apple and its wild relatives. Meeting Abstract. Available: https://pag.confex.com/pag/xx/webprogram/Paper3193.html.
Application of functional genomics to plant cryopreservation - (Abstract Only)
Volk, G.M., Henk, A.D., Gross, B.L. 2011. Application of functional genomics to plant cryopreservation [meeting abstract]. In: Proceedings of Cryo 2011: 48th Annual Meeting of the Society for Cyrobiology. July 24-27, 2011, Corvallis, Oregon. p. 63.
Diversity in wild apple species of Chinese origin - (Abstract Only)
Volk, G.M., Henk, A.D., Richards, C.M., Baldo, A.M., Forsline, P.L. 2010. Diversity in wild apple species of Chinese origin. Meeting Abstract. American Society for Horticultural Science annual conference, Palm Desert, CA August 2-5, 2010.
Gene expression in response to cryoprotectant and liquid nitrogen exposure in Arabidopsis shoot tips - (Peer Reviewed Journal)
Volk, G.M., Henk, A.D., Chhandak, B. 2011. Gene expression in response to cryoprotectant and liquid nitrogen exposure in Arabidopsis shoot tips. Acta Horticulturae. 908: 55-66.
Capturing The Diversity Of Wild Malus Orientalis From Georgia, Armenia, Russia And Turkey - (Peer Reviewed Journal)
Volk, G.M., Richards, C.M., Henk, A.D., Reilley, A.A., Reeves, P.A., Forsline, P.L., Aldwinckle, H.S. 2009. Capturing The Diversity Of Wild Malus Orientalis From Georgia, Armenia, Russia And Turkey. Journal of the American Society for Horticultural Science. 134:453-459.
Identification of historic apple trees in the Southwestern United States and implications for conservation - (Peer Reviewed Journal)
Routson, K., Reilley, A., Henk, A.D., Volk, G.M. 2009. Identification of historic apple trees in the Southwestern United States and implications for conservation. HortScience 44:589-594.
Resistance Gene Analogs in Six Genera of Rosaceae: A Family-wide Classification - (Abstract Only)
Baldo, A.M., Volk, G.M., Henk, A.D., Iezzoni, A., Olmstead, J.W., Aldwinckle, H.S., Weber, C., Samuelian, S., Malnoy, M. 2009. Resistance Gene Analogs in Six Genera of Rosaceae: A Family-wide Classification. Plant & Animal Genome XVII Conference. Annual Conference. January 10-14, 2009. San Diego, CA. pp.182. Meeting Abstract.
Novel diversity identified in a wild apple population from Kyrgyz Republic - (Peer Reviewed Journal)
Volk, G.M., Richards, C.M., Henk, A.D., Reilley, A., Miller, D.D., Forsline, P.L. 2009. Novel diversity identified in a wild apple population from Kyrgyz Republic. HortScience 44:516-519.
Selection of stratified core sets representing wild apple (Malus sieversii) - (Peer Reviewed Journal)
Richards, C.M., Volk, G.M., Reeves, P.A., Reilley, A., Henk, A.D., Forsline, P.L., Aldwinckle, H. 2009. Selection of stratified core sets representing wild apple (Malus sieversii). Journal of the American Society for Horticultural Science. 134:228-235.
Gene expression in response to cryoprotectant and liquid nitrogen exposure in Arabidopsis shoot tips - (Abstract Only)
Volk, G.M., Henk, A.D., Chhandak, B. Gene expression in response to cryoprotectant and liquid nitrogen exposure in Arabidopsis shoot tips. I International Symposium on Cryopreservation in Horticultural Species, April 5-8, 2009. Leuven, Belgium. pp. 24. Meeting abstract.
Genetic diversity and population structure in Malus sieversii, a wild progenitor species of domesticated apple. - (Peer Reviewed Journal)
Richards C.M., G. Volk, A.A. Reilley, A.D. Henk, D. Lockwood, P.A. Reeves, and P.L. Forsline. 2009. Genetic diversity and population structure in Malus sieversii, a wild progenitor species of domesticated apple. Tree Genetics and Genomics 5:339-347.
Genetic diversity and disease resistance of wild Malus orientalis from Turkey and southern Russia - (Peer Reviewed Journal)
Volk, G.M., Richards, C.M., Reilley, A., Henk, A.D., Reeves, P.A., Forsline, P.L., Aldwinckle, H. 2008. Genetic diversity and disease resistance of wild Malus orientalis from Turkey and southern Russia. Journal of the American Society for Horticultural Science 133:383-389.
Genetic diversity of wild Malus orientalis - (Abstract Only)
Volk, G.M., Richards, C.M., Henk, A.D., Reilley, A., Reeves, P.A., Forsline, P.L. 2007. Genetic diversity of wild Malus orientalis. Plant & Animal Genome XVI Conference. Annual Conference. January 12-16, 2008. San Diego, CA. pp. 137. Meeting Abstract.
Genetic Diversity of the Malus sieversii Collection in the USDA-ARS National Plant Germplasm System - (Abstract Only)
Volk, G.M., Richards, C.M., Henk, A.D., Reilley, A., Forsline, P.L. 2007. Genetic Diversity of the Malus sieversii Collection in the USDA-ARS National Plant Germplasm System. Meeting Abstract HortScience. July 16-19, 2007, Scottsdale, Arazona. 44:895.
Gene Expression patterns in cryogenically stored Arabidopsis thaliana shoot tips - (Abstract Only)
Basu, C., Volk, G.M., Henk, A.D. 2007. Gene Expression patterns in cryogenically stored Arabidopsis thaliana shoot tips. Meeting Abstract for the 5th Canadian Plant Genomics Workshop. July 30,-August 2, 2007, Vancouver, BC, Canada pp. 56.
Genetic diversity assessment of wild Malus sieversii populations in Kazakhstan - (Abstract Only)
Volk, G.M., C.M. Richards, A. Henk, A. Reilley and P. Forsline. 2007. Genetic diversity assessment of wild Malus sieversii populations in Kazakhstan. Meeting Abstract for the Plant and Animal Genome Conference. January 13-18, 2007, San Diego, California. pp. 133.
Genetic Diversity of Wild Pyrus Communis L. - (Abstract Only)
Volk, G.M., Richards, C.M., Henk, A.D., Reilley, A., Bassil, N.V., Postman, J.D. 2006. Genetic diversity of wild pyrus communis l. American Society of Horticulture Science Meeting. July 26-29, 2006, New Orleans, Louisiana. 41: 1035. Meeting Abstract.
Diversity of Wild Pyrus Communis Based on Microsatellite Analyses - (Peer Reviewed Journal)
Volk, G.M., Richards, C.M., Henk, A.D., Reilley, A., Bassil, N.V., Postman, J.D. 2006. Diversity of wild pyrus communis based on microsatellite analyses. Journal of the American Society for Horticultural Science. Vol. 131:408-417.
Patterns of Molecular and Quantitative Trait Variation in Malus Sieversii from Kazakhstan - (Abstract Only)
Richards, C.M., Henk, A.D., Reilley, A., Forsline, P.L., Volk, G.M. 2006. Patterns of molecular and quantitative trait variation in Malus sieversii from kazakhstan. Meeting Proceedings of the Plant and Animal Genome XIV, January 13-18, 2006, San Diego, CA.
Ex Situ Conservation of Vegetatively-Propagated Species: Development of a Seed-Based Core Collection for Malus Sieversii - (Peer Reviewed Journal)
Volk, G.M., A. Reilley, A.D. Henk, P.L. Forsline, H.S. Aldwinckle, and C.M. Richards. 2005. Ex situ conservation of vegetatively-propagated species: development of a seed-based core collection for Malus sieversii. Journal of the American Society of Horticultural Science. 130:203-210.
How Many Garlics Are There? - (Trade Journal)
Volk, G.M., A.D. Henk and C.M. Richards. 2004. How many garlics are there? The Garlic Press 44:5-8.
Genetic Diversity among Us Garlic Clones As Detected Using Aflp Methods - (Peer Reviewed Journal)
Volk, G.M., A.D. Henk and C.M. Richards. 2004. Genetic Diversity among US garlic clones as detected using AFLP methods. Journal of the American Society for Horticultural Science 129(4):559-569.
Genetic and Physical Localization of the Soybean Rpg1-B Disease Resistance Gene Reveals a Complex Locus Containing Several Tightly Linked Families of Nbs-Lrr Genes - (Peer Reviewed Journal)
Ashfield, T., A. Bocian, D. Held, A.D. Henk, L.F. Marek, D. Danesh, S. Penuela, K. Meksem, D.A. Lightfoot, N.D. Young, R.C. Shoemaker and R.W. Innes. 2003. Genetic and physical localization of the soybean Rpg1-b disease resistance gene reveals a complex locus containing several tightly linked families of NBS-LRR genes. Molecular Plant-Microbe Interactions 16:817-826.
Diversity of Garlic Accessions Within the National Plant Germplasm System - (Abstract Only)
Volk, G.M., Henk, A.D., Richards, C.M. 2003. Diversity of garlic accessions within the national plant germplasm system. HortScience. 2003. 38:736.
Sex Determination - (Book / Chapter)
Antolin M.F. and A.D. Henk. 2003. Sex Determination. pp.1024-1032. In V.H. Resh and R.T. Carde (eds). Encyclopedia of Insects, Academic Press, San Diego.
Comparison of DNA Extraction Methods for Genetic Analysis of Garlic - (Abstract Only)
Harris, J., Henk, A.D., Volk, G.M. Comparison of dna extraction methods for genetic analysis of garlic. Colorado State University Undergraduate Research: Creative Symposium, April 23, 2002, Fort Collins, Colorado. p.60.
Genetic Variability among Accessions of Garlic in the USDA National Plant Germplasm System - (Abstract Only)
VOLK, G.M., HENK, A.D., RICHARDS, C.M. GENETIC VARIABILITY AMONG ACCESSIONS OF GARLIC IN THE USDA NATIONAL PLANT GERMPLASM SYSTEM. American Society of Plant Biologists. 2002. Pp25.
Last Modified: 9/21/2014
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