A preconference book of abstracts will be provided to speakers and registrants on the first day of the meeting.
Abstracts: Submit abstracts, for talks or posters, electronically by August 8 as an attachment in MS Word, Word Perfect, or in a text format. Please use the following format: Times Roman 12 point with 1 inch margins. Abstracts should be one full page and include: names, institution, e-mail address, brief overview of the problem, methods, and results (graphics are encouraged). If you wish to bring additional handouts and want them copied at the meeting, let us know. Submit your abstract(s) to: corjf@ars-grin.gov
If you do not get an acknowledgment of receipt, we didn't receive it successfully!
A full viewing of abstracts and the meeting agenda will be available on the conference web site www. ars-grin.gov/cor/wpbrmeet by August 23, 1999.
Please indicate if you wish to present an oral report or a poster. Oral reports will be 25 minutes with 5 minutes for questions. If many additional speakers register time may be reduced to 20 minutes per speaker. Posters will be affixed with push pins and limited to 4' x 4' and will be presented Tuesday evening before the dinner.
Oral Presentations/Posters:
Written reports from the oral presentations or posters will be considered for publication in the journal: HortTechnology. Each report will be no longer than 5 pages double spaced.
Authors submitting papers to be published in HortTechnology should use U. S. units followed by their metric equivalents in parentheses. If the original measurements of observations were actually made in metric units, report metric units first followed by their U. S. equivalents in parentheses. Authors may not use metric units without reporting their equivalents in U. s. units. Metric units should be reported in accordance with the Systeme International díUnites (SI) version of the metric system. In some cases it may be appropriate to mix U. S. and metric units, e.g. yield in tons/acre and seed weight in grams, or use specialized units common to a commodity or discipline, e.g., 3-gal container, 50-lb sack, bushel, hundredweight.
In papers that report large numbers of units in the text, it may be awkward to supply both U. S. and metric equivalents for every unit reported. The Associate Editor or Editor will advise authors in such cases. Equivalents for units in tables and figures may be reported as conversion factors in the titles and captions or as footnotes.
Please contact Kim Hummer (hummerk@bcc.orst.edu) for additional information concerning format for journal publication.
Example Report Format: (THIS IS ONLY A SAMPLE!)
White Pine Blister Rust in the Ribes Collection at the NCGR-Corvallis
Kim E. Hummer1 and Chad Finn 2
Additional index words. Genetics, germplasm, currants, gooseberries
Summary. Accessions for 55 Ribes species were evaluated for presence of uredia of white pine blister rust (WPBR), Cronartia ribicola Fischer, during the fall of 1995, 1996, and 1997 after natural infection. Incidence varied by year, within taxonomic sections, and between and within species. The number of infected accessions was greatest in 1997, the autumn with the most precipitation. During this study, 36 species were observed to be infected with WPBR; 19 had no observable uredia. Some species may contain new sources of genes for developing additional rust-resistant commercial Ribes cultivars. For the cultivars, about 82 % of the black currant (R. nigrum L.); about 27% of the red, white and pink currants (R. rubrum L.); 15% of the gooseberries (R. uva-crispa L. and R. oxyacanthoides L.); 13% of the black currant x gooseberry hybrids (R. x nidigrolaria Bauer) had uredia of C. ribicola. Further studies should be conducted to confirm WPBR resistance of cultivars and species through artificial inoculation.
1Research Leader. USDA ARS National Clonal Germplasm Repository, 33447 Peoria Road, Corvallis, OR 97333-2521.
2Small Fruit Geneticist, USDA ARS HCRL, Corvallis, OR 97333.
White pine blister rust (WPBR) is a fungal disease which requires both a five-needle white pine, Pinus L., and, currant or gooseberry, Ribes L., to complete its life cycle. This disease can be lethal to pines but only moderately affects Ribes. The first occurrence of WPBR in a large Ribes collection the United States occurred in 1906 (Steward, 1906) and, by 1937, the rust had naturally spread across the northern tier of North America (Darrow, 1937).
Materials and methods
The Ribes plantation for this study covers about a quarter of an acre including 55 species and about 400 genotypes from North and South America, Europe, and Asia. Each accession is represented by one or two plants. In-row plant spacing is 3 ft and between row spacing is 8 ft. Turf is planted between the rows. In 1995, 1996, and 1997 Ribes plants were visually evaluated in August through October for the presence of uredia of C. ribicola on abaxial leaf surfaces. If one plant of a species was observed to have uredia that species was reported as infected. Plants without uredia were noted but these plants were not necessarily considered as "resistant" because this study relied on natural infection.
Results and discussion
Uredia of C. ribicola were present on 36 Ribes taxa in at least one year, while 19 others had no uredia (Table 1 and 2). WPBR infection varied by year (Table 1 and 2), which may have depended on the weather and amount of rain or fog. The most infection occurred in 1997, the year with the most August and September rains; the least infection occurred in 1996, with the least rains in those months (Taylor, 1997). Ten species that had no uredia in 1995 or 1996 (Hummer, 1997) became infected in 1997 (Table 1). Eight R. sanguineum cultivars, which had no uredia previously (Hummer, 1997), became infected in 1997 (Table 1). Infection also varied within taxonomic sections and between and within species (Table 1). Some of the non-infected Ribes species (Table 2) were native outside the vicinity of eastern Russia, the native range of the rust. These non-infected species may contain new sources of genes for developing additional rust-resistant commercial Ribes cultivars.
Literature cited
Darrow, G. M. 1937. Improvements of Currants and Gooseberries p. 534-544 in: Yearbook of Agriculture. U.S. Department of Agriculture, Govt. Prt. Off. Washington.
Hummer, K. 1997. Diamonds in the Rust: Ribes resistance to White pine blister rust. Fruit Var. J. 51(2):112-117.
Stewart. F. C. 1906. An outbreak of the European currant rust. N.Y. Agri. Expt. Sta. Tech. Bull. No. 2. Geneva, N.Y. pp. 61-74.
Taylor, G. H. 1997. Weather summary for Corvallis, Oregon. July, August, and September 1997. Oregon Climate Service. Oregon State University, Corvallis.