Hi Robert& Rob, thank you, - as you know its only a bit luck here and I did not breed this one.
…
but perhaps the trait really can be bred in!!
I searched for possible viruses that could express such a pattern … but nothing like this should be possible per virus, it seems.
I will do infection experiments in the next weeks too, but I think its origin is of other kind.
Here are my todays results for this topic:
http://image.fs.uidaho.edu/vide/famly114.htm#Rosa
Rosa
Susceptible to:
Apple mosaic ilarvirus
http://image.fs.uidaho.edu/vide/descr024.htm
Natural host range and symptoms
Symptoms persist.
(…)
Rosaceae (many species) - necrotic ringspots.
(…)
Summary: Symptoms are different.
Arabis mosaic nepovirus
http://image.fs.uidaho.edu/vide/descr030.htm
Natural host range and symptoms
Symptoms disappear soon after infection (but plants may remain stunted).
(…) P. persica, (…) Rosa spp., R - mosaics, mottling and chlorotic ringspots and sometimes necrosis.
Summary: Symptoms are different.
chlorotic ringspots would be something like this:
http://www.apsnet.org/online/Archive/2004/iw000039.asp
Citrus enation - woody gall (?) luteovirus
http://image.fs.uidaho.edu/vide/descr217.htm
Natural host range and symptoms
Symptoms persist.
(…) Rosa sp., (…) - woody galls.
Summary: Symptoms are different.
Prunus necrotic ringspot ilarvirus
http://image.fs.uidaho.edu/vide/descr658.htm
Natural host range and symptoms
Symptoms persist (in some hosts), or disappear soon after infection (in some hosts).
(…)
Rosa (rose) - chlorotic lines and rings, oak leaf patterns, no recovery.
(…)
Summary: Symptoms are different.
Rose (?) tobamovirus
http://image.fs.uidaho.edu/vide/descr699.htm
Host range and symptoms
First reported in Rosa spp.; from Essex, U.K.; by Hicks and Frost (1984).
Natural host range and symptoms
Symptoms persist. Symptoms flower break.
Rosa spp. - deformed flecked and streaked petals, but roses infected with this tobamovirus, by sap or grafting, show no flower symptoms so the cause of the flower break disease is unknown.
Summary: Symptoms are different.
Strawberry latent ringspot (?) nepovirus
http://image.fs.uidaho.edu/vide/descr757.htm
Host range and symptoms
First reported in Fragaria vesca and Rubus idaeus; from Dundee, Scotland; by Lister (1964).
Natural host range and symptoms
(…)
Rosa spp. - chlorotic ringspots and stunting.
(…)
Summary: Symptoms are different.
chlorotic ringspots would be something like this:
http://www.apsnet.org/online/Archive/2004/iw000039.asp
Rosa setigera
Common names:
Prairie rose; Climbing rose
Susceptible to:
Tobacco streak ilarvirus
http://image.fs.uidaho.edu/vide/descr811.htm
Host range and symptoms
First reported in Nicotiana tabacum; from Wisconsin, U.S.A; by Johnson (1936).
Natural host range and symptoms
Symptoms persist (most hosts do not recover).
(…)
Rosa setigera - leaf vein yellowing.
(…)
Summary: Symptoms are different.
So it should be a Mutation or a Transposon or something I don’t know … .
Greetings!
Arno
Link: image.fs.uidaho.edu/vide/famly114.htm#Rosa