|
|
-
-
|
I am trying to identify a few of my unknown seedlings and this may be a possible parent. I have a few questions that will help with my determinations:
1) Is L83 a once-bloomer or does it repeat? How well does it repeat if it does?
2) Does the wood on this variety darken during cold weather, especially during the winter?
3) For anyone that has used it in their rose hybridizing program, does it often produce once-bloomers when paired with repeat blooming varieties?
|
REPLY
|
|
L83 is a once bloomer but flowers for a good length of time.
Hybrids with it can repeat their bloom, but it appears there is a wide variation in how much they do. For example, 'George Vancouver' in a Zone 3 climate is essentially a once bloomer but flowers over a long period of time. On the other hand, 'Rosy Vision' ('Dornroschen' x L83 reputedly repeats quite well. The Swedish 'Anna' and 'Irma' also supposedly repeat quite well. Perhaps to obtain repeat blooming progeny it's best using L83 as the staminate parent in a breeding program as was done in Sweden, but no controlled studies have been done to determine that yet.
The potential of using L83 in breeding programs to develop roses for cold climates (Zone 3) is unlimited. For example, nothing has been done yet combining it with the Meidiland landscape roses that I'm aware of. The progeny would likely have an attractive semi-weeping form and perhaps have increased disease resistance over L83.
For further information.
Three New Winter-hardy Explorer Rose Cultivars - HortScience.
Four Novel Swedish Cultivars - HortScience.
'George Vancouver' - HortScience
|
REPLY
|
-
-
|
In PP10009 Shrub rose plant named `George Vancouver`, it states that the L83 line was derived from a cross between Rosa kordesii and breeding line G49. G49 is a seedling of Max Graf as is R. kordesii.
|
REPLY
|
|
Rob..........
As I read your comment, the parentage of the rose should be reported as seedling X seedling as the roses used in the cross were unnamed seedlings. Am I reading this correctly ?
Smiles,
Lyn
|
REPLY
|
|
Hi Lyn. Felicitas Svejda listed the parentage of L83 as R. kordesii x G49. G49 was a study name for her own tetraploid seedling of 'Max Graf'. I'm thinking that G49 should have its own entry and listed as a seedling of 'Max Graf' hybridized by Felicitas Svejda and L83 should have the parentage listed as R. kordesii x G49. The reason I think these should have their own entries with parentage listed as Felicitas had them is that these roses were important in the breeding of many Canadian roses. Some are still working with L83 and with direct descendants now. What do you think? Thank you!
Rob
|
REPLY
|
|
Rob.......
I put up 'G49' as a rose page and added the parentage to 'L83' as you suggested in your post. I would love to put up more plant characteristics for these roses. Can you email me at HMFRoses @ (at)aol.com ? Delete the (at) in the email addy.
Smiles,
Lyn
|
REPLY
|
|
Rob Byrnes:
L83 was a line released by Dr. F. Svejda to the scientific community at large for research purposes. Lineage is given in her publication "Rose Germplasm L83" HortScience 23(2): 415-416. 1988. I hope that this will be of use.
All the very best.
Dr. Neville Arnold,
Northern Hybrid Roses,
RR #2,
Green Valley, Ontario
K0C 1L0 CANADA
|
REPLY
|
|
