ISHS Acta Horticulturae 262: V International Symposium on Rubus & Ribes
EVERGREEN BLACKBERRY SCREENING FOR GENETIC THORNLESSNESS |
| Authors: | E.H. Nelson, J.T. DeFrancesco, L.W. Martin, R.L. Skirvin |
| Abstract:
Two trials of 'Oregon Thornless Evergreen' blackberry (Rubus laciniatus WILLD.) produced through tissue culture have been established in hopes of identifying a genetically thornless clone as productive as the chimerally thornless Oregon standard. In a replicated planting, nine potentially-thornless compact clones were compared with Illinois tissue-cultured standards and Oregon vegetatively propagated standards. Illinois and Oregon standards performed comparably. The most productive of the nine potentially thornless compact clones was comparable to the standards, but produced a partially thorny cane. The type and extent of thorny regrowth will be evaluated in 1989. In a screening trial of 91 clones selected from 1300 bent-petiole plantlets, 43 performed well in the first year. All 91 will be evaluated for productivity and thornlessness in 1989. | |
Download Adobe Acrobat Reader (free software to read PDF files) | |
