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Roses, Clematis and Peonies
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Initial post yesterday by KarelBvn
In a booklet called "Rozeninzicht" published by DvP-CLO (Departement voor Plantengenetica en -veredeling - Centrum voor Landboukundig Onderzoek ~ connected to Rijkstation voor Sierplantenteelt Melle, don't know the specifics) I found this information about Melflor (so direct information of the breeders themselves):

Melflor: bred in 1982 from
"tetraploid R. rugosa seedling" x seedling

It was introduced by RVS Rijksstation voor Sierplantenteelt in 1987 as Melflor.

Further in the booklet, in the information of Melrose, a descendant of Melflor, it is mentioned that they've used a chromosome-doubled seedling of R. rugosa to create Melflor. This seedling was - very likely (mentioned elsewhere in this booklet) - created in vitro culture (so in a highly controled lab environment) treated with a colchicine solution to induce polyploidisation. So to create a tetraploid from a diploid parent.
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Reply #1 of 1 posted today by jedmar
Thank you! The Rijksstation voor Sierplantenteelt joined In 1998 with the Rijksstation voor Plantenveredeling to form the Departement Plantengenetica en -veredeling (DvP).
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Initial post yesterday by lewkat
If you want to see what this plant looks like Liens Garden YouTube channel has a video called "50 rose varieties, rose tour early December 2024 "back yard"". This rose is featured at the 25 min 40 second mark in this video.
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Initial post 2 days ago by SDShine
The blooms are gorgeous with leather-like petals that last forever in a vase. Unfortunately, for me, it is a mildew magnet in 10a Oakland hills.
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Initial post 2 days ago by Matthew 0rwat
I grew this in the 1990s and recall intense fragrance
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