Hello to all!
I stumbled across this Nature-article. Even though it was published in 2021, it might be a supplemental information for R. rugosa fans, if not yet known.
Conclusions
As a popular ornamental plant, R. rugosa is widely cultivated. The flowers of R. rugosa have been utilized for essential oil production and dried to produce flower tea. The economic value of this plant will certainly grow if molecular breeding accelerates the production of novel cultivars with optimized essential oil content and improved floral traits. A high-quality reference genome will provide a map for the identification of genes responsible for key agronomic traits and provide insights into how rugosa rose evolved during its long evolutionary history. This study provides for the first time the valuable resource of a R. rugosa genome for the rose research community. Through analysis of the genome sequence of R. rugosa and comparative genomic analyses, we provide novel insights into the biology, ecology and evolution of R. rugosa from three main perspectives. From the perspective of structural genomics, we show a large reversed segment in R. chinensis and a translocation in strawberry. From the perspective of floral biology, we found that more MADS-box genes were retained in R. rugosa than in R. chinensis, suggesting their potential roles in floral development in R. rugosa. From the perspective of stress biology, a number of stress-related genes were found to be specifically expanded and retained in R. rugosa, potentially contributing to its adaptation to stressful environments.
Hybrid Rosa rugosa "Pranciška"x Hybrid Spinosissima “Egle” ("Double White"x “Seager Wheeler”).It blooms once .It bloome the next after the seedlings were planting.It participates in futher selection with the old garden roses.
Photos of roses with names:
1.Hybrid Rosa rugosa “Pranciška"x"R.laxa”
2.Hybri Rosa rugosa "Pranciška"x Hybrid Spinossima “Egle” ("Double White"x “Seager Wheeler”
3.Hybrid Rosa rugosa"Pranciška"x Hybrid spinosissima “Egle” "Double White"x “Seager Wheeler”)
4.Hybrid rosa rugosa “Pranciška” x Old garden roses
5.Hybrid rosa rugosa “Pranciška” x Old garden roses
6.Hybrid rosa rugosa “Pranciška” x Old garden roses
These are some really excellent and exciting results–I think that your “Pranciška” is particularly interesting because it seems like it may be a direct tetraploid sexual offspring of a diploid rugosa selection (‘Schneekoppe’). If so, that would help to illustrate the value of pollinating tetraploids (R. gallica ‘Officinalis’) with diploids to take advantage of the occasional production of unreduced pollen in the latter. That could essentially have given you a fully half-rugosa, tetraploid, fertile breeding bridge somewhat like “R. ×kordesii,” only using R. gallica as the other parent. It would be really interesting to know how cold-hardy “Pranciška” is, and how well it transmits its cold hardiness to its offspring.
Thanks for the valuable information and important insights.Rose “Pranciška” cold resistance is excellent (zone 4,Lithuania).This resistance to cold is transmitted to its offspring without problems.This rose and the seedling are young and further development needs to be observed.The rose bears fruit and is a good pollinator.This rose spreads slowly.
R. gallica "Officinalis’ is the mother of R.“Pranciška”.I put another Rosa Rugosa hybrid “Janina”.Her mother is Hybrid Rosa Rugosa “Lac Majeau”.The father is R.gallica “Agatha Incarnata”.This rose does not bear fruit,but is a good pollinator.It is more difficult to spread in cool,rainy wheather.It likes heat,it blooms twice,winters well.
Rose “Janina”(Hybrid rosa rugosa "Lac Majeau"x R.gallica “Agatha Incarnata”)
