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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.)
Pruning time × cultivar effects on flower-bud hardiness in northern highbush and southern highbush blueberry Reprint Icon -
Ehlenfeldt, M.K., Vinyard, B.T. 2015. Pruning time × cultivar effects on flower-bud hardiness in northern highbush and southern highbush blueberry. HortScience. 50(5): 673-675.
LT25, LT50, and LT75 determinations for a diverse selection of vaccinium genotypes Reprint Icon -
Ehlenfeldt, M.K., Rowland, L.J., Ogden, E.L., Vinyard, B.T. 2015. LT25, LT50, and LT75 determinations for a diverse selection of vaccinium genotypes. Canadian Journal of Plant Science. 95(3):491-494.
Utilizing V. constablaei and V. ashei in germplasm and cultivar development -
Ehlenfeldt, M.K., Rowland, L.J. 2015. Utilizing V. constablaei and V. ashei in germplasm and cultivar development. Blueberry Research Extension North American Workers Conference Proceedings. DOI: 10.7282/T35140W5.
a-glucosidase inhibitory activity and antioxidant capacities in peel and pulp of mixed species blueberry (Vaccinium spp.) genotypes -
Ehlenfeldt, M.K., Wang, S.Y., Camp, M.J. 2014. a-glucosidase inhibitory activity and antioxidant capacities in peel and pulp of mixed species blueberry (Vaccinium spp.) genotypes. Plant Genetic Resources: Characterization and Utilization. 13:190-194.
Highly fertile intersectional blueberry hybrids of Vaccinium padifolium Section Hemimyrtillus and V. corymbosum Section Cyanococcus Reprint Icon -
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 -
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 -
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 -
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 -
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 Reprint Icon -
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) Reprint Icon -
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 -
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) Reprint Icon -
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 Reprint Icon -
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 -
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 -
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 -
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 -
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 -
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 -
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 -
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 Reprint Icon -
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 -
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 -
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. -
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 -
Cold Tolerance of Blueberry Genotypes throughout the Dormant Period from Acclimation to Deacclimation -
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 -
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.) -
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 -
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 -
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 -
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.) -
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 -
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 -
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 -
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 -
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 -
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 -
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 -
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) -
ANTHRACNOSE FRUIT-ROT RESISTANCE IN BLUEBERRY CULTIVARS. -
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 -
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 -
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) -
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. -
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 -
INVESTIGATIONS OF METAXENIA IN NORTHERN HIGHBUSH BLUEBERRY (VACCINIUM CORYMBOSUM L.) CULTIVARS -
'ELLIOTT' HIGHBUSH BLUEBERRY -
BUD HARDINESS AND DEACCLIMATION IN BLUEBERRY CULTIVARS WITH VARYING SPECIES ANCESTRY: FLOWERING TIME MAY NOT BE A GOOD INDICATOR OF DEACCLIMATION -
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.) -
FRUIT FIRMNESS AND HOLDING ABILTY IN HIGHBUSH BLUEBERRY-IMPLICATIONS FOR MECHANICAL HARVESTING -
POSTHARVEST RESEARCH AND TECHNOLOGY IN VACCINIUM. -
IDENTIFYING SOURCES OF RESISTANCE TO MUMMY BERRY AND ANTHRACNOSE IN HIGHBUSH, RABBITEYE, AND SPECIES GERMPLASM. -
A SURVEY OF FRUIT FIRMNESS IN HIGHBUSH BLUEBERRY (V. CORYMBOSUM L.) AND SPECIES-INTROGRESSED BLUEBERRY (V. X CORYMBOSUM L.) CULTIVARS -
A DISEASE RESISTANCE DATABASE FOR BLUEBERRY CULTIVARS -
OXYGEN RADICAL ABSORBANCE CAPACITY (ORAC), PHENOLIC, AND ANTHOCYANIN CONCENTRATIONS IN FRUIT AND LEAF TISSUE OF HIGHBUSH BLUEBERRY -
OXYGEN RADICAL ABSORBANCE CAPACITY (ORAC), PHENOLIC, AND ANTHOCYANIN CONCENTRATIONS IN FRUIT AND LEAF TISSUE OF HIGHBUSH BLUEBERRY -
MUMMY BERRY BLIGHT RESISTANCE IN RABBITEYE BLUEBERRY CULTIVARS -
ASPECTS OF SELF- AND CROSS-FERTILITY IN RECENTLY RELEASED HIGHBUSH BLUEBERRY CULTIVARS -
RESISTANCE TO BLIGHTING BY MONILINIA VACCINII-CORYMBOSI IN DIPLOID AND POLYPLOID VACCINIUM SPECIES -
RESISTANCE OF DIPLOID VACCINIUM SPECIES TO THE FRUIT ROT STAGE OF MUMMY BERRY DISEASE -
ANTIOXIDANT CAPACITY IS INFLUENCED BY TOTAL PHENOLIC AND ANTHOCYANIN CONTENT, MATURITY AND VARIETY OF VACCINIUM SPECIES -
'CHANTICLEER' HIGHBUSH BLUEBERRY -
MUMMY BERRY DISEASE FRUIT INFECTION RESISTANCE IN HIGHBUSH BLUEBERRY CULTIVARS -
ENHANCED BUD PRODUCTION IN HIGHBUSH BLUEBERRY (VACCINIUM CORYMBOSUM, L.) IN RESPONSE TO PACLOBUTRAZOL -
A FURTHER EXAMINATION OF THE RELATIONSHIP BETWEEN SHOOT LENGTH AND MUMMY BERRY RESISTANCE IN HIGHBUSH BLUEBERRY CULTIVARS -
BREEDING BLUEBERRIES FOR THE NEW CENTURY -
MUMMY BERRY BLIGHT RESISTANCE IN HIGHBUSH BLUEBERRY CULTIVARS -
Last Modified: 8/26/2016
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