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Found 73 results
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Ryan Contreras
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Conference Proceedings
R. Contreras
,
Rothleutner, J. J.
, and
Stockwell, V.
,
“
Breeding for fire blight resistance and sterility in Cotoneaster
”
,
Proceedings of the 13th International Workshop on Fire Blight. Acta Hort
, vol. 1056:221-223. 2014.
K. S. lattier
and
Contreras, R.
,
“
Chemical mutagenesis of Galtonia candicans Decne. results in altered morphology and reduced fertility
”
,
Proc. 60th Ann. SNA Res. Conf. 60:XXX-XXX
. 2015.
J. A. Schulze
and
Contreras, R.
,
“
Effect of ploidy level on vegetative propagation of two cytotypes of Prunus laurocerasus L. ‘Schipkaensis’.
”
,
Combined Proceedings of the International Plant Propagators' Society 65
. 2015.
J. J. Rothleutner
,
Contreras, R.
, and
Stockwell, V.
,
“
Evaluation of fire blight resistance of 31 species of Cotoneaster
”
,
Proc. 57th Ann. SNA Res. Conf.
, vol. 57:276-278. 2012.
R. Contreras
and
Friddle, M. W.
,
“
Fire blight resistance among interspecific and interploidy F1 hybrids of Cotoneaster
”
,
Proc. 60th Ann. SNA Res. Conf. 60:XXX-XXX
. 2015.
J. D. Lattier
and
Contreras, R.
,
“
Hybridization Studies in Lilacs
”
,
Proc. 59th Ann. SNA Res. Conf. 59:229-234
. 2014.
R. Contreras
and
Ruter, J. M.
,
“
Induced polyploidy in Japanese cedar
”
,
Proc. 55th Ann. SNA Res. Conf.
, vol. 55:25-29. 2010.
R. Contreras
and
Ruter, J. M.
,
“
New Callicarpa species with breeding potential
”
,
Proc. 52nd Ann. SNA Res. Conf.
, vol. 52:327-329. 2007.
R. Contreras
and
Ranney, T. G.
,
“
New opportunities for breeding allopolyploid azaleodendrons
”
,
Proc. 49th Ann. SNA Res. Conf.
, vol. 49:552-554. 2004.
K. S. lattier
and
Contreras, R.
,
“
Non-targeted mutagenesis of Galtonia candicans Decne. through exposure to ethyl methanesulfonate
”
,
Combined Proceedings of the International Plant Propagators' Society 65
. 2015.
R. Contreras
,
“
Ornamental Plant Breeding at Oregon State University
”
,
Combined Proceedings of the International Plant Propagators' Society 63
. 2014.
R. Contreras
and
Ruter, J. M.
,
“
Preliminary efforts to induce polyploidy in Cryptomeria japonica.
”
,
Proc. 53rd Ann. SNA Res. Conf.
, vol. 53:159-161. 2008.
R. Contreras
,
Friddle, M. W.
, and
Lattier, J. D.
,
“
Relative fertility and ploidy levels of selected rose of sharon cultivars
”
,
Proc. 58th Ann. SNA Res. Conf.
, vol. 58:232-236. 2013.
R. Contreras
,
Ranney, T. G.
,
Tallury, S. P.
, and
Milla-Lewis, S. R.
,
“
Using molecular markers to investigate parentage of azaleodendron hybrids.
”
,
Proc. 50th Ann. SNA Res. Conf.
, vol. 50:632-635. 2005.
Journal Article
R. Contreras
,
Velez, J.
, and
Golembiewsk, R.
,
“
Are Learning Styles, Study Habits, and Performance Correlated in Woody Plant Identification Students?
”
,
HortTechnology
, 2013.
R. Contreras
and
McAninch, G.
,
“
Back from the ban: new Buddleja cultivars receive exemption under ODA amendment
”
,
Digger
, pp. 33-36, 2013.
R. Contreras
,
“
Bred for success
”
,
Digger
, pp. 41-45, 2011.
R. Contreras
and
Horn, M.
,
“
Breeding to improve garden performance of Penstemon in the Willamette Valley: early stages
”
,
Bulletin of the American Pestemon Society
, vol. 73, pp. 68-72, 2014.
R. Contreras
,
“
Bridging the gap: A new partnership between Oregon State University and LPDC designed to continue cultivar development.
”
,
Landscape Plant News
, 2010.
R. Contreras
and
Ruter, J. M.
,
“
Callicarpa evaluation and breeding at The University of Georgia Tifton Campus
”
,
Landscape Plant News
, vol. 20(2), pp. 3-5, 2009.
J. J. Rothleutner
and
Contreras, R.
,
“
Celebrating Cotoneaster
”
,
Digger
, pp. 33-36, 2012.
R. Contreras
,
Ruter, J.
,
Owen, J. S.
, and
Hoegh, A.
,
“
Chlorophyll, Carotenoid, and Visual Color Rating of Japanese-cedar Grown in the Southeastern United States
”
,
HORTSCIENCE
, vol. 48, no. 12, 2013.
J. A. Schulze
,
Contreras, R.
, and
Scagel, C. F.
,
“
Comparing Vegetative Propagation of Two ‘Schipkaensis’ Common Cherrylaurel Ploidy Levels
”
,
HortTechnology
, vol. 27, no. 1, pp. 69 - 72, 2017.
R. Contreras
,
Ruter, J. M.
,
Conner, J.
,
Zeng, Y.
, and
Ozias-Akins, P.
,
“
Confirmation of hybridity using GISH and determination of 18S rDNA copy number using FISH in interspecific F
1
hybrids of
Tecoma
(Bignoniaceae)
”
,
Genome
, vol. 55, no. 6, pp. 437 - 445, 2012.
B. M. Schwartz
,
Harris-Schultz, K. R.
,
Contreras, R.
, and
Hans, C. S.
,
“
Creation of artificial triploid and tetraploid centipedegrass using colchicine and breeding
”
,
Intl. Turfgrass Soc. Res. J.
, 2013.
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