Uneven Distribution of Tobacco Streak Virus in Santiam Blackberry Before and After Heat Therapy

Publisher Website
Google Scholar
Abstract
Santiam is an Oregon [USA] blackberry [Rubus ursinus] cultivar that is naturally infected with the Rubus strain of tobacco streak virus (TSV-R). Indexing of softwood propagants showed that TSV-R was unevenly distributed in the shoot system when ''Santiam'' plants were grown at normal greenhouse temperatures. When grown at a constant 37.degree. C over a 14 mo. period, ''Santiam'' plants also produced healthy and virus-infected propagants. The percentage of infected propagants varied with the source of the mother plant, increased in cyclic fashion with time, but was not influenced by the nodal position on the shoot from which the propagant was taken. ''Santiam-75'' a clone obtained free from known viruses, produced significantly (32%) more shoots in field tests than stock infected with TSV-R.

This publication has 0 references indexed in Scilit: