August 2006 scientific paper - blackspot and rose breeding

See:

http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6TC3-4K717X2-1&_user=10&_handle=V-WA-A-W-AZ-MsSAYWA-UUA-U-AAZUZCAVDY-AACYWBWWDY-AWUDYAWWD-AZ-U&_fmt=summary&_coverDate=08%2F15%2F2006&_rdoc=8&_orig=browse&_srch=%23toc%235159%232006%23998909995%23628682!&_cdi=5159&view=c&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=aa802a7730a27c3b4e40508a43a5537a

Link: www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6TC3-4K717X2-1&_user=10&_handle=V-WA-A-W-AZ-MsSAYWA-UUA-U-AAZUZCAVDY-AACYWBWWDY-AWUDYAWWD-AZ-U&_fmt=summary&_coverDate=08%2F15%2F2006&_rdoc=8&_orig=browse&_srch=%23toc%235159%232006%23998909995%236

Of particular interest to me in this paper is that a yellow - Poulsen’s “Chinatown” - only showed 4.7 % blackspot infection. As a comparison The Fairy had 11.9 % infection, Lichtkonigin Lucia exhibited 32.2 % infection, Orange Triumph had 60.6 % and Allgold had 87.5 %.

HelpMeFind lists the present offspring of Chinatown, see:

Has anyone used Chinatown? Any comments on the zone 5 rating?

Link: www.helpmefind.com/rose/pl.php?n=1155&tab=1

Chinatown grows vigorously bolt upright here. It provides a good Spring flush and very little repeat in this climate. It’s has a very stiff growth habit and it’s very prickly. For some reason I have decided to ignore it in terms of breeding.Perhaps I should look at it again? The lack of repeat is a real deficit. It probably repeats well in cooler climates.

Friesinger Morgenrote, a cultivar from Lichtkonigin Lucia is partially blackspot prone here.

Chinatown does not exhibit blackspot at a local cottage nursery that does not spray.

The results do not suprise me to be honest.

I’ve used it a little. It is apparently a triploid, so it

doesn’t give a large number of offspring. I don’t recall

seeing blackspot on it, but it is somewhat prone to mildew

here.