Search found 1024 matches

by henry kuska
Sat Jun 08, 2019 11:07 am
Forum: Rose Hybridizers Association Forum
Topic: Three-year screening for cold hardiness of garden roses
Replies: 0
Views: 702

Three-year screening for cold hardiness of garden roses

They looked at: "Name Synonym Rose type1 Breeder / Author1 Coldest USDA Zone2 Temperature range (°C)3 Ploidy level4 Propagation method 'John Cabot' Hybrid Kordesii Felicitas Svejda 2b −42.8 ∼ −40.0 4x Cutting 'J.P. Connell' shrub Felicitas Svejda 2b −42.8 ∼ −40.0 3x Cutting 'Henry Kelsey' Hybrid Kor...
by henry kuska
Sat May 25, 2019 1:58 pm
Forum: Rose Hybridizers Association Forum
Topic: Best sources for virus free hybrid teas?
Replies: 3
Views: 337

Re: Best sources for virus free hybrid teas?

The most recent Foundation Plant Services at UC Davis web page that I am aware of is at:

https://ucanr.edu/sites/ncpnrose/files/285806.pdf

If anyone is aware of anything more recent, please post.
by henry kuska
Thu May 16, 2019 4:18 pm
Forum: Rose Hybridizers Association Forum
Topic: A.R.T.S. national trial gardens
Replies: 1
Views: 200

A.R.T.S. national trial gardens

"Each year, more rose breeders send their most promising introductions to the A.R.T.S. national trial gardens to be evaluated under low-input conditions across the various U.S. climate regions. Each year’s set of trial roses are grown side by side with two industry standard/control roses that have w...
by henry kuska
Thu May 16, 2019 4:13 pm
Forum: Rose Hybridizers Association Forum
Topic: "assay reveal the presence of rose cryptic virus-1 in the United Kingdom"
Replies: 1
Views: 151

Re: "assay reveal the presence of rose cryptic virus-1 in the United Kingdom"

Here is a general review:

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2880111/

" In plants, they appear to persist indefinitely. For example, years of continuous tissue culture, thermotherapy and meristem tip culture were unable to cure plants of partitiviruses (Szegö et al. 2005). "
by henry kuska
Thu May 16, 2019 10:37 am
Forum: Rose Hybridizers Association Forum
Topic: "assay reveal the presence of rose cryptic virus-1 in the United Kingdom"
Replies: 1
Views: 151

"assay reveal the presence of rose cryptic virus-1 in the United Kingdom"

Title: " High throughput sequencing and RT-qPCR assay reveal the presence of rose cryptic virus-1 in the United Kingdom" "A sample with symptoms similar to those caused by rose rosette virus was positive for RoCV1; further studies will be undertaken to investigate if those symptoms were due to mixed...
by henry kuska
Mon May 13, 2019 10:35 am
Forum: Rose Hybridizers Association Forum
Topic: Can anyone update this information?
Replies: 5
Views: 716

Re: Can anyone update this information?

The powerpoints have not yet appeared, but this summary concerning the rose rosette virus has:

https://today.agrilife.org/2019/05/10/r ... XPZ9pTaOh8
by henry kuska
Sat Apr 13, 2019 9:06 pm
Forum: Rose Hybridizers Association Forum
Topic: Can anyone update this information?
Replies: 5
Views: 716

Re: Can anyone update this information?

Today I received an email that the plans are to post (within a month) the presentation powerpoints on the NCPN Rose web site.
by henry kuska
Fri Apr 12, 2019 10:31 am
Forum: Rose Hybridizers Association Forum
Topic: background reading -Apomixis
Replies: 0
Views: 334

background reading -Apomixis

"In agriculture, apomixis has the potential to transform plant breeding, allowing new varieties to retain valuable traits through asexual reproduction. The production of seeds without sexual union is considered the holy grail of plant biology (Hofmann 2010)." See: https://link.springer.com/article/1...
by henry kuska
Fri Apr 12, 2019 10:25 am
Forum: Rose Hybridizers Association Forum
Topic: By following what is happening with related plants
Replies: 1
Views: 195

By following what is happening with related plants

"Experimental procedures exploiting RNAi approaches allowed the generation of Prunus necrotic ringspot virus (PNRSV) resistant individuals of a cherry rootstock217. Grafting of these individuals demonstrated small RNA transport from rootstock to scion, resulting in “Emperor Francis” scions becoming ...