Rose Hybridizers Association Forum

"A new virus resembling members in the genus Carlavirus was identified in an Out of Yesteryear rose (Rosa sp.) by high-throughput sequencing. The virus was discovered during the screening of a rose virus collection belonging to Foundation Plant Services (UC-Davis)." "Based on genome organization, se...

"A novel virus was discovered in a Rosa wichuraiana Crep. by high-throughput sequencing and tentatively named "rose virus A" (RVA)." "RVA is the first carlavirus identified in rose and has the highest nucleotide sequence similarity to poplar mosaic virus." See: https://web.a.ebscohost.com/abstract?d...

"............ and rose spring dwarf-associated virus were also identified in both samples with mosaic disease and asymptomatic samples." See: https://www.x-mol.com/paper/1294264051380658176?adv From the full article: "The results showed that RSDaV was present in mosaic (YJ3) and (YJ5) and asymptomat...

See:

https://www.ndrs.org.uk/pdfs/042/NDR_042013.pdf

See:


https://ashs.confex.com/ashs/2019/meeti ... term=roses

See:

https://ashs.confex.com/ashs/2019/meeti ... aper/30621

Title: "Rose virus R, a cytorhabdovirus infecting rose"

See:


https://pubmed.ncbi.nlm.nih.gov/33394170/

https://link.springer.com/article/10.10 ... 20-04927-6

Title: "Prevalence and molecular characterization of Turkish isolates of the rose viruses" See: https://www.sciencedirect.com/science/article/pii/S0261219421000351/pdfft?md5=f7bea2f8f495db6620a9976f6e0ab018&pid=1-s2.0-S0261219421000351-main.pdf Please note that the Highlights could be misinterpreted...

I have updated my web page to include the California work.

See:

https://apsjournals.apsnet.org/doi/abs/ ... 0-2268-PDN

This what I have on my web page (it will have to be updated):

https://sites.google.com/site/wildrosel ... tedisease/

See:

https://ucanr.edu/sites/natcpn/files/342499.pdf

See the last part of Table 1 for a summary of the rose virus information.

What I am particularly interested in include:


A picture of what the infected leaves look like.


A discussion of how the virus is transmitted.

"RNA was extracted from ‘Hugh Dickson’ rose leaves displaying virus-like symptoms in Maryland, USA. Using high-throughput sequencing, we identified a new virus, tentatively named “rose virus R”"

See:

https://link.springer.com/article/10.10 ... 20-04927-6

See:

https://www.sciencedaily.com/releases/2 ... 212931.htm

AND

https://onlinelibrary.wiley.com/doi/ful ... zj5THIR3ww

See:

https://scholarworks.calstate.edu/downloads/5h73q0840

California is a very large state with many climatic variations. There is, like in most states, University based agricultural extension service publications which provide information for their climatic conditions. This is what was last updated 2/2020.

http://ipm.ucanr.edu/PMG/PESTNOTES/pn7463.html

I would suggest one of the red Kordes roses since they were (in general) selected for both hardiness and disease resistance. Illusion is one example.

I prefer sand in baggie. It is easy to see if too wet or not wet enough. The sand can be removed with a strainer without the possibility of damaging the root. Sand does not support mold.

I recommend getting a copy of the old newsletters.

https://rosebreeders.org/amember/signup ... 23p64s23d1

Rugosa seeds normally float. Personal experience and: https://cdnsciencepub.com/doi/pdf/10.4141/cjps72-177

I did not apply the float test to my rugosa hybrids. I do not remember any extensive studies regarding the float behavior of first generation (or higher) hybrids.