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United States Department of Agriculture

Agricultural Research Service

Mark K. Ehlenfeldt

Research Geneticist (Plants)


Publications (Clicking on the reprint icon Reprint Icon will take you to the publication reprint.)
Highly fertile intersectional blueberry hybrids of Vaccinium padifolium Section Hemimyrtillus and V. corymbosum Section Cyanococcus - (Peer Reviewed Journal)
Ehlenfeldt, M.K., Polashock, J.J. 2014. Highly fertile intersectional blueberry hybrids of Vaccinium padifolium Section Hemimyrtillus and V. corymbosum Section Cyanococcus. Journal of the American Society for Horticultural Science. 139:30-38.
Variation among highbush blueberry cultivars for frost tolerance of open flowers Reprint Icon - (Peer Reviewed Journal)
Rowland, L.J., Ogden, E.L., Takeda, F., Glenn, D.M., Ehlenfeldt, M.K., Vinyard, B.T. 2013. Variation among highbush blueberry cultivars for frost tolerance of open flowers. HortScience. 48(6):692-695.
Self-fertility evaluations of northern-adapted rabbiteye blueberry hybrids Reprint Icon - (Peer Reviewed Journal)
Ehlenfeldt, M.K., Kramer, M.H. 2012. Self-fertility evaluations of northern-adapted rabbiteye blueberry hybrids. HortScience. 47:1837-1842.
Vaccinium Species of Section Hemimyrtillus: Their value to cultivated blueberry and approaches to utilization Reprint Icon - (Peer Reviewed Journal)
Ehlenfeldt, M.K., Ballington, J. 2012. Vaccinium Species of Section Hemimyrtillus: Their value to cultivated blueberry and approaches to utilization. Botany. 90:347-353.
Cold-hardiness, acclimation, and deacclimation among diverse blueberry (Vaccinium spp.) genotypes Reprint Icon - (Peer Reviewed Journal)
Ehlenfeldt, M.K., Rowland, L.J., Ogden, E.L., Vinyard, B.T. 2012. Cold-hardiness, acclimation, and deacclimation among diverse blueberry (Vaccinium spp.) genotypes. HortScience. 137:31-37.
Antioxidant capacity and alpha-glucosidase inhibitory activity in peel and flesh of blueberry (Vaccinium sp.) Cultivars - (Peer Reviewed Journal)
Wang, S.Y., Camp, M.J., Ehlenfeldt, M.K. 2011. Antioxidant capacity and alpha-glucosidase inhibitory activity in peel and flesh of blueberry (Vaccinium sp.) Cultivars. Food Chemistry. 132:1759-1768.
Flavonoid constituents and their contribution to antioxidant activity in cultivars and hybrids of rabbiteye blueberry (Vaccinium ashei Reade) - (Peer Reviewed Journal)
Wang, S.Y., Chen, H., Camp, M.J., Ehlenfeldt, M.K. 2011. Flavonoid constituents and their contribution to antioxidant activity in cultivars and hybrids of rabbiteye blueberry (Vaccinium ashei Reade). Food Chemistry. 132:855-864.
Summer Sunset: A new ornamental blueberry variety Reprint Icon - (Peer Reviewed Journal)
Nesmith, D.S., Ehlenfeldt, M.K. 2011. Summer Sunset: A new ornamental blueberry variety. HortScience. 46:1560-1561.
Antioxidant capacities vary substantially among cultivars of rabbiteye blueberry (Vaccinium ashei Reade) - (Peer Reviewed Journal)
Wang, S.Y., Chen, H., Ehlenfeldt, M.K. 2011. Antioxidant capacities vary substantially among cultivars of rabbiteye blueberry (Vaccinium ashei Reade). International Journal of Food Science and Technology. 46:2482-2490.
Variation in antioxidant enzyme activities and nonenzyme components among cultivars of rabbiteye blueberries (Vaccinium ashei Reade) and V. ashei derivatives - (Peer Reviewed Journal)
Wang, S.Y., Chen, H., Ehlenfeldt, M.K. 2011. Variation in antioxidant enzyme activities and nonenzyme components among cultivars of rabbiteye blueberries (Vaccinium ashei Reade) and V. ashei derivatives. Food Chemistry. 120:13-20.
Ranking cultivated blueberry for Mummy Berry Blight and Fruit Infection Incidence Reprint Icon - (Peer Reviewed Journal)
Ehlenfeldt, M.K., Polashock, J.J., Stretch, A., Kramer, M.H. 2010. Ranking cultivated blueberry for Mummy Berry Blight and Fruit Infection Incidence. HortScience. 45:1205-1210.
Seed set, berry weight, and yield interactions in highbush blueberry cultivars (Vaccinium corymbosum L.) ‘Bluecrop’ and ‘Duke’ Reprint Icon - (Peer Reviewed Journal)
Ehlenfeldt, M.K., Martin Jr, R.B. 2010. Seed set, berry weight, and yield interactions in highbush blueberry cultivars (Vaccinium corymbosum L.) ‘Bluecrop’ and ‘Duke’. Journal of American Pomological Society. 64:161-170.
Est-Pcr Markers Developed for Highbush Blueberry Are Also Useful for Genetic Fingerprinting and Relationship Studies in Rabbiteye Blueberry - (Peer Reviewed Journal)
Rowland, L.J., Ogden, E.L., Ehlenfeldt, M.K. 2010. EST-PCR markers developed for Highbush Blueberry are also useful for genetic fingerprinting and relationship studies in Rabbiteye Blueberry. Scientia Horticulturae. 125:779-784.
Est-PCR markers developed from highbush blueberry sequences are useful for genetic fingerprinting and relationship studies in rabbiteye blueberry - (Abstract Only)
Rowland, L.J., Ogden, E.L., Ehlenfeldt, M.K. 2010. Est-PCR markers developed from highbush blueberry sequences are useful for genetic fingerprinting and relationship studies in rabbiteye blueberry. Meeting Abstract. 2010:p.56.
"Blue Suede"TM: A southern highbush blueberry for the home gardener - (Germplasm Registration)
Nesmith, S.D., Ehlenfeldt, M.K. 2010. "Blue Suede"TM: A southern highbush blueberry for the home gardener. HortScience. 45:302-303.
Mummy Berry Fruit Rot and Shoot Blight Incidence in Blueberry: Prediction, Ranking, and Stability in a Long-term Study Reprint Icon - (Peer Reviewed Journal)
Ehlenfeldt, M.K., Polashock, J.J., Stretch, A.W., Kramer, M.H. 2010. Mummy Berry Fruit Rot and Shoot Blight Incidence in Blueberry: Prediction, Ranking, and Stability in a Long-term Study. HortScience. 45:92-97.
Molecular Detection and Discrimination of Blueberry Red Ringspot Virus Strains Causing Disease in Cultivated Blueberry and Cranberry - (Peer Reviewed Journal)
Polashock, J.J., Ehlenfeldt, M.K., Crouch, J.A. 2009. Molecular detection and discrimination of blueberry red ringspot virus strains causing disease in cultivated blueberry and cranberry. Plant Disease. 23:720-726.
Cold hardiness of southern-adapted blueberry genotypes and the potential for their use in northern adapted blueberry breeding - (Peer Reviewed Journal)
Ehlenfeldt, M.K., Rowland, L.J., Ogden, E.L., Vinyard, B.T. 2009. Cold hardiness of southern-adapted blueberry genotypes and the potential for their use in northern adapted blueberry breeding. Plant Breeding. 128:393-396.
Instrumental and sensory quality characteristics of blueberry fruit from twelve cultivars - (Peer Reviewed Journal)
Saftner, R.A., Polashock, J.J., Ehlenfeldt, M.K., Vinyard, B.T. 2008. Instrumental and sensory quality characteristics of blueberry fruit from twelve cultivars. Postharvest Biology and Technology. 49:19-26.
Cold Tolerance of Blueberry Genotypes throughout the Dormant Period from Acclimation to Deacclimation - (Peer Reviewed Journal)
Rowland, L.J., Ogden, E.L., Ehlenfeldt, M.K., Arora, R. 2008. Cold Tolerance of Blueberry Genotypes throughout the Dormant Period from Acclimation to Deacclimation. HortScience. 43:1970-1974.
Suppression of Flowering in "bluecrop" Highbush Blueberry. - (Abstract Only)
Black, B., Ehlenfeldt, M.K., Martin Jr, R.B. 2006. Suppression of flowering in "bluecrop" highbush blueberry. American Society of Horticulture Science Meeting. 55:8269-8274.
Analytical and sensory quality characteristics of twelve blueberry cultivars - (Abstract Only) - (01-Apr-07)
Cold Tolerance of Blueberry Genotypes throughout the Dormant Period from Acclimation to Deacclimation - (Abstract Only)
Rowland, L.J., Ogden, E.L., Ehlenfeldt, M.K. 2007. Cold Tolerance of Blueberry Genotypes throughout the Dormant Period from Acclimation to Deacclimation. HortScience, v. 42, p. 823
Cold Hardiness of Vaccinium ashei, V. constablaei and Hybrid Flower Buds and the Potential for Producing Northern-Adapted Rabbiteye Cultivars - (Peer Reviewed Journal)
Ehlenfeldt, M.K., Rowland, L.J., Ogden, E.L., Vinyard, B.T. 2007. Cold Hardiness of Vaccinium ashei, V. constablaei and Hybrid Flower Buds and the Potential for Producing Northern-Adapted Rabbiteye Cultivars. HortScience. 42:1131-1134.
Inheritance Patterns of Parthenocarpic Fruit Development in Highbush Blueberry (Vaccinium corymbosum L.) - (Peer Reviewed Journal)
Vorsa, N., Ehlenfeldt, M.K. 2007. Inheritance Patterns of Parthenocarpic Fruit Development in Highbush Blueberry (Vaccinium corymbosum L.). HortScience. 42:1127-1130.
Foliar Applications of GA4+7 Reduce Flowering in Highbush Blueberry - (Peer Reviewed Journal)
Black, B., Ehlenfeldt, M.K. 2007. Foliar Applications of GA4+7 Reduce Flowering in Highbush Blueberry. HortScience, vol. 42, pp. 555-558.
Organoleptic Analysis of Blueberry Cultivars - (Proceedings)
Polashock, J.J., Saftner, R.A., Ehlenfeldt, M.K. 2007. Organoleptic Analysis of Blueberry Cultivars. New Jersey Annual Vegetable Meeting Proceedings, pp. #152-153.
G-435 and ARS 96-138, Pink-Fruited Blueberry Selections - (Peer Reviewed Journal)
Ehlenfeldt, M.K., Finn, C.E. G-435 and ars 96-138, pink-fruited blueberry selections. HortScience. 42:172-173.
Parthenocarpic Fruit Development in Highbush Blueberry (Vaccinium Corymbosum L.) - (Proceedings)
Ehlenfeldt, M.K. 2006. Parthenocarpic fruit development in highbush blueberry (vaccinium corymbosum l.). Blueberry Research Extension North American Workers Conference Proceedings. P. 82-84.
Progress in Selection for Cold-Hardiness, Adaption, and Quality in Vaccinium Ashei and Vaccinium Ashei/v. Constablaei Derivatives and the Potential for Northern-Adapted Rabbiteye Cultivars - (Abstract Only)
Ehlenfeldt, M.K., Rowland, L.J. 2006. Progress in selection for cold-hardiness, adaption, and quality in vaccinium ashei and vaccinium ashei/v. constablaei derivatives and the potential for northern-adapted rabbiteye cultivars. American Society of Horticulture Science Meeting. 41:936
Evaluaton of Mid-Winter Cold Hardiness among 25 Rabbiteye Blueberry (Vaccinium Ashei Reade) Cultivars - (Peer Reviewed Journal)
Ehlenfeldt, M.K., Ogden, E.L., Rowland, L.J., Vinyard, B.T. 2006. Evaluaton of mid-winter cold hardiness among 25 rabbiteye blueberry (vaccinium ashei reade) cultivars. HortScience. 41:579-581.
Leaf Disk Infection by Colletotrichum Acutatum and Its Relation to Fruit Rot in Diverse Blueberry Germplasm - (Peer Reviewed Journal)
Polashock, J.J., Ehlenfeldt, M.K., Stretch, A.W., Kramer, M. 2006. Leaf disk infection by colletotrichum acutatum and its relation to fruit rot in diverse blueberry germplasm. Plant Disease. 41:270-271.
Cold Hardiness, Deacclimation Kinetics, and Bud Development among 12 Diverse Blueberry (Vaccinium SPP.) Genotypes under Field Conditions - (Peer Reviewed Journal)
Rowland, L.J., Ogden, E.L., Ehlenfeldt, M.K., Vinyard, B. 2005. Cold hardiness, deacclimation kinetics, and bud development among 12 diverse blueberry (vaccinium spp.) genotypes under field conditions. Journal of American Society for Horticultural Science. 130:508-514.
"hannah's Choice" Highbush Blueberry - (Peer Reviewed Journal)
Ehlenfeldt, M.K., Stretch, A.W., Yorsa, N., Draper, A.D. 2005. "hannah's choice" highbush blueberry. HortScience. 40:1558-1560.
"cara's Choice' Blueberry - (Peer Reviewed Journal)
Ehlenfeldt, M.K., Stretch, A.W., Vorsa, N., Draper, A.D. 2004. "cara's choice' blueberry. Hortscience. 40:1556-1557.
Winter-Hardiness and Deacclimation Behavior of Diverse Blueberry (Vaccinium SPP.) Genotyped under Field Conditions - (Proceedings)
Ehlenfeldt, M.K. 2005. Winter-hardiness and deacclimation behavior of diverse blueberry (vaccinium spp.) genotyped under field conditions. New Jersey Annual Vegetable Meeting Proceedings.
Susceptibility of Blueberry Cultivars to Fruit and Foliage Infection by Anthracnose (Colletotrichum Acutatum) - (Proceedings) - (27-Jul-04)
Anthracnose Fruit-Rot Resistance in Blueberry Cultivars. - (Peer Reviewed Journal)
Polashock, J.J., Ehlenfeldt, M.K., Kramer, M.H., Stretch, A.W. 2004. Anthracnose fruit-rot resistance in blueberry cultivars.. Plant Disease. 89:33-38.
Dehardening Kinetics, Bud Development, and Dehydrin Metabolism in Blueberry (Vaccinium SPP.) Cultivars During Deacclimation - (Peer Reviewed Journal)
Arora, R., Rowland, L.J., Ogden, E.L., Dhanaraj, A.J., Marian, C.O., Ehlenfeldt, M.K., Vinyard, B.T. 2004. Dehardening kinetics, bud development, and dehydrin metabolism in blueberry (vaccinium spp.) cultivars during deacclimation. Journal of the American Society for Horticultural Science.129:667-674
Cold-Hardiness of Vaccinium Ashei and V. Constablaei Germplasm and the Potential for Northern-Adapted Rabbiteye Cultivars - (Proceedings)
Ehlenfeldt, M.K., Rowland, L.J. 2004. Cold-hardiness of vaccinium ashei and v. constablaei germplasm and the potential for northern-adapted rabbiteye cultivars. Acta Horticulturae. Paper No. 38.
Development of Est-Pcr Markers for DNA Fingerprinting and Mapping in Blueberry (Vaccinium, Section Cyanococcus) - (Peer Reviewed Journal)
Rowland, L.J., Smriti, M., Dhanaraj, A., Ehlenfeldt, M.K., Ogden, E.L., Slovin, J.P. 2003. Development of est-pcr markers for dna fingerprinting and mapping in blueberry (vaccinium, section cyanococcus). Journal of American Society for Horticultural Science. 128 (5):682-690.
Bud Hardiness and Deacclimation in Blueberry Cultivars with Varying Species Ancestry : Flowering Time May Not Be a Good Indicator of Deacclimation. - (Proceedings)
Ehlenfeldt, M.K., Rowland, L.J., Arora, R. 2002. Bud hardiness and deacclimation in blueberry cultivars with varying species ancestry : flowering time may not be a good indicator of deacclimation.. Acta Horticulture Proceedings. 626:39-44.
Fruit Firmness and Holding Ability - Implications for Mechanical Harvesting - (Abstract Only) - (08-Sep-02)
Investigations of Metaxenia in Northern Highbush Blueberry (Vaccinium Corymbosum L.) Cultivars - (Peer Reviewed Journal) - (07-Sep-02)
'elliott' Highbush Blueberry - (Review Article) - (12-Jun-02)
Bud Hardiness and Deacclimation in Blueberry Cultivars with Varying Species Ancestry: Flowering Time May Not Be a Good Indicator of Deacclimation - (Abstract Only)
Ehlenfeldt, M.K., Rowland, L.J., Rajeev, A. 2002. Bud hardiness and deacclimation in blueberry cultivars with varying species ancestry: flowering time may not be a good indicator of deacclimation. International Society for Horticultural Science Meeting.
Interspecific Variation in Anthocyanins, Phenolics and Antioxidant Capacity among Genotypes of Highbush and Lowbush Blueberries (Vaccinium Section Cyanococcus SPP.) - (Peer Reviewed Journal) - (25-Jul-01)
Fruit Firmness and Holding Abilty in Highbush Blueberry-Implications for Mechanical Harvesting - (Peer Reviewed Journal) - (16-May-01)
Postharvest Research and Technology in Vaccinium. - (Proceedings) - (15-Mar-01)
Identifying Sources of Resistance to Mummy Berry and Anthracnose in Highbush, Rabbiteye, and Species Germplasm. - (Proceedings) - (15-Mar-01)
A Survey of Fruit Firmness in Highbush Blueberry (V. Corymbosum L.) and Species-Introgressed Blueberry (V. X Corymbosum L.) Cultivars - (Peer Reviewed Journal) - (07-Mar-01)
A Disease Resistance Database for Blueberry Cultivars - (Abstract Only) - (20-Jan-01)
Oxygen Radical Absorbance Capacity (Orac), Phenolic, and Anthocyanin Concentrations in Fruit and Leaf Tissue of Highbush Blueberry - (Peer Reviewed Journal) - (04-Jan-01)
Oxygen Radical Absorbance Capacity (Orac), Phenolic, and Anthocyanin Concentrations in Fruit and Leaf Tissue of Highbush Blueberry - (Abstract Only) - (15-Apr-00)
Mummy Berry Blight Resistance in Rabbiteye Blueberry Cultivars - (Peer Reviewed Journal) - (11-Apr-00)
Aspects of Self and Cross-Fertility in Recently Released Highbush Blueberry Cultivars - (Abstract Only) - (30-Jun-99)
Resistance to Blighting by Monilinia Vaccinii-Corymbosi in Diploid and Polyploid Vaccinium Species - (Peer Reviewed Journal) - (02-Mar-99)
Resistance of Diploid Vaccinium Species to the Fruit Rot Stage of Mummy Berry Disease - (Peer Reviewed Journal) - (02-Sep-98)
Antioxidant Capacity Is Influenced by Total Phenolic and Anthocyanin Content, Maturity and Variety of Vaccinium Species - (Peer Reviewed Journal) - (19-Jun-98)
'chanticleer' Highbush Blueberry - (Peer Reviewed Journal) - (21-Apr-98)
Mummy Berry Disease Fruit Infection Resistance in Highbush Blueberry Cultivars - (Peer Reviewed Journal) - (20-Mar-98)
Enhanced Bud Production in Highbush Blueberry (Vaccinium Corymbosum, L.) in Response to Paclobutrazol - (Peer Reviewed Journal) - (06-May-97)
A Further Examination of the Relationship Between Shoot Length and Mummy Berry Resistance in Highbush Blueberry Cultivars - (Peer Reviewed Journal) - (07-Feb-97)
Breeding Blueberries for the New Century - (Peer Reviewed Journal) - (17-Nov-96)
Mummy Berry Blight Resistance in Highbush Blueberry Cultivars - (Peer Reviewed Journal) - (22-Mar-95)
Last Modified: 2/28/2014
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