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'Rosa menstrua portlandica' rose Reviews & Comments
Discussion id : 111-250
most recent 7 JUN 18 HIDE POSTS
Initial post 4 JUN 18 by JasonSims1984
I bet this would be an excellent rose to hybridize with. I mean, it's a tetraploid, so it's fully compatible with modern HTs. So basically, this rose could be a good scaffold for a more formal flower. I could imagine a cross with Mr. Lincoln to give it better disease resistance. It has all of the basic genetics for rebloom and good foliage, and the flower form is nice and simple. It probably carries genes for damask fragrance.
Reply #1 of 6 posted 6 JUN 18 by Give me caffeine
Mr. Lincoln doesn't have particularly good resistance to disease. It survives defoliation because of its inherent vigour, but it's not resistant as such.
Reply #3 of 6 posted 6 JUN 18 by JasonSims1984
Oh, yeah, when I say "give it better disease resistance" I'm referring to improving Mr. Lincoln. I think Portlandica and Autumn Damask could be kind of a good fallback point for creating better hybrid teas. I also think that some species roses would be a good idea to add back into the rose gene pool to get better disease resistance and vigor. Rugosa, bracteata, moschata, and fedtschenkoana are all really good.
Reply #5 of 6 posted 7 JUN 18 by Andrew from Dolton
'Duchess of Portland' gets blackspot very badly.
Reply #6 of 6 posted 7 JUN 18 by Give me caffeine
Aha. Yes that makes sense. :)
Reply #2 of 6 posted 6 JUN 18 by Plazbo
If going for red, Roundelay would probably be a better option than Mr Lincoln
Reply #4 of 6 posted 6 JUN 18 by JasonSims1984
What do you think about Dark Desire by Kordes? I have heard a lot of good things about its disease resistance.
Discussion id : 103-846
most recent 1 AUG 17 HIDE POSTS
Initial post 1 AUG 17 by Sambolingo
Available from - Old Market Farm
Discussion id : 46-961
most recent 31 DEC 12 SHOW ALL
Initial post 20 JUL 10 by Margaret Furness
Does this rose sucker if grown on its own roots?
Reply #1 of 2 posted 31 DEC 12 by odinthor
Yes! But modestly, not aggressively. In perhaps 20 years, my plant's suckers and shoots haven't expanded the plant's area by more than a foot or two. I have no patience with imperialistic roses or other plants; but 'Portlandica' is absolutely no problem at all. It's a very lovable variety, in my estimation.
Reply #2 of 2 posted 31 DEC 12 by Margaret Furness
Thank you!
Discussion id : 2-889
most recent 20 MAY 11 SHOW ALL
Initial post 25 FEB 04 by Unregistered Guest
At the risk of repeating... Here's the Comment:

It has been thought for a long time that the Portland roses had the china rose as a parent.

A recent survey from the university of Lyon (France) has shown there is no China parentage in "Duchesse de Portland".

The link is

Having worked with breeding the Portland Rose, I too would say that there is no China rose in its background.
Reply #1 of 2 posted 20 MAY 11 by Hardy
Quite right. After being told for decades that the Portland Rose was something like ((Autumn Damask x some gallica) x some China, probably Slater's Crimson), DNA tests have shown that it has no China ancestry at all. See, for example, The Rose: An Illustrated History, by Peter Harkness, 2003, p. 131.
Reply #2 of 2 posted 20 MAY 11 by Palustris
I guess this is either not new information or it has recently been confirmed do to genetic testing. Graham S. Thomas in the 1994 edition of his 'Rose Book' has a footnote regarding the 'Portland Rose',

"It is now considered that the parents of the 'Portland Rose' were R. gallica and R. damascena var. semperflorens and they owe nothing to R. chinensis"
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