ISHS Acta Horticulturae 189: I International Symposium of the Research and Cultivation of Roses
ROOTSTOCK NATIVE TO JAPAN |
| Author: | K. Ohkawa |
| Abstract:
There are many native wild roses in Japan. But as rootstock, only R. multiflora is used. The author collected many strains of R. multiflora from all over Japan and selected strains resistant to nematoda and crown gall and has denoted them as K-1 and K-2. Presently, K-1 and K-2 are used widely as rootstock under cover in Japan. The author has also collected six Japanese native wild roses, in addition to R. multiflora, in an effort to find a better rootstocks with improved characteristics including compatibility, productivity and quality. The following rootstock were used; R. catheyensis, R. Wichuraiana, R. bracteata, R. laevigata, R.hirtula, R.acicularis and R.multiflora "K-1". R.laevigata is the better rootstock from among those mentioned above including R.multiflora "K-1". Productivity of R.laevigata is almost the same as R.multiflora "K-1". The quality (stem length and stem weight) is better than R.multiflora, because when R.laevigata is used as rootstock, lower portion of the leaves of scion variety do not drop even in the mid-winter. R.laevigata is native to China and Taiwan and was introduced to Japan in ancient times. Currently R.laevigata has become a wild rose, especially in the southern part of Japan. Vigour of this wild rose is very strong. New shoots reach heights of 3 m or more and many scions can be obtained. Nursery stock can be made by cutting-grafts under the mist. | |
Download Adobe Acrobat Reader (free software to read PDF files) | |
