Rose Hybridizers Association Forum

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.

See:

http://enpuir.npu.edu.ua/bitstream/1234 ... ermany.pdf

See:
https://link.springer.com/article/10.10 ... 20-03652-7

See:

https://bioone.org/journals/florida-ent ... .0317.full

Interesting question. Perhaps your experience could contribute to the science,

See:

https://link.springer.com/article/10.10 ... 20-03670-5

https://pdf.sciencedirectassets.com/271177/1-s2.0-S0304423800X01525/1-s2.0-0304423890900319/main.pdf?X-Amz-Security-Token=IQoJb3JpZ2luX2VjEPn%2F%2F%2F%2F%2F%2F%2F%2F%2F%2FwEaCXVzLWVhc3QtMSJIMEYCIQDJEBZL2cAVanoj1Is%2FXv3PfC9aH28yaKapGONNIi9AmAIhAKH2KiLSnge6YFVVJN2LV5S2xPSRQRP3TvIyKoAQfzmQKr0DCOH%2F%2...

Thanks David for the complete reply. I am not familiar with Nanopore sequencing. It may be useful to the NCPN due to the lower cost: "Nanopore sequencing has several advantages such as the relatively low cost compared to other HTS technologies, high mobility due to the sequencer small size and rapid...

The NCPN 2019 meeting estimated the cost of HTS as $350. slide 27 of 30 https://ucanr.edu/sites/ncpnrose/files/316401.pdf ----------------------------------------------------------- Having a reliable testing method is a primary necessity for developing a clean plant program. However, it is not the o...

Title: "ASSESSMENT OF GENETIC VARIABILITY AND DEVELOPMENT OF HYBRIDS IN ROSA SPECIES"

205 page thesis.

http://prr.hec.gov.pk/jspui/bitstream/1 ... %20prr.pdf

This series of slides has to do with a comparison of how the accuracy of the previous type of tests compares with high throughput sequencing (HTS). Please note that even PCR misses some infections. https://ucanr.edu/sites/ncpnrose/files/330324.pdf ----------------------------------------------------...

Link timed out see karl's in next post. Thank you Karl.