Search found 5 matches

by Gismapper
Wed Sep 18, 2019 3:36 pm
Forum: Rose Hybridizers Association Forum
Topic: Environment and gene expression
Replies: 18
Views: 746

Re: Environment and gene expression

There are many cases where gene expression is altered by environmental conditions. ...it appears that the enzyme that converts cyanin to peonin is variable in its expression. I can't say for sure why it produces more peonin around Zurich, Switzerland than Morden, Manitoba. Hi Karl, You had me at 'H...
by Gismapper
Fri Sep 06, 2019 9:14 pm
Forum: Rose Hybridizers Association Forum
Topic: Show and Tell?
Replies: 25
Views: 1400

Re: Show and Tell?

Ploidy can be a bit of a challenge when you're just starting out. It's bad enough when two diploids give sterile (mostly) hybrids because their chromosomes just don't line up properly. 'Max Graf', from R. wichuraiana and a Rugosa gives very little pollen. And the plants I've seen raised from it (as...
by Gismapper
Sun Aug 25, 2019 9:46 am
Forum: Rose Hybridizers Association Forum
Topic: Agnes as parent?
Replies: 7
Views: 304

Re: Agnes as parent?

Also this made me wonder about heat and rugosa hybrids setting hips, which was mentioned before. Any more thoughts or findings on this? I don't have a lot of experience (in fact, i just started looking into hybridizing roses a few months ago), but i have two rugosas (Hansa and Alba), and they both ...
by Gismapper
Thu Aug 01, 2019 10:48 pm
Forum: Rose Hybridizers Association Forum
Topic: Show and Tell?
Replies: 25
Views: 1400

Re: Show and Tell?

In addition to its hardiness, perfume and reliable rebloom, 'Hansa' has color. According to Eugster & Märki-Fischer (1991), the pigment is almost pure peonin. Usually, this pigment appears clear pink or red with no tendency to "blue'". As such, it combines well with orange (pelargonidin) and yellow...
by Gismapper
Mon Jul 29, 2019 11:14 am
Forum: Rose Hybridizers Association Forum
Topic: Show and Tell?
Replies: 25
Views: 1400

Re: Show and Tell?

I suppose this is also my "hello world" post, since it's my first on the forum. I've been obsessed with rugosas since I was a kid because my aunt used to have a "Hansa" bush (which she had gotten from her mother - so it goes way back to the 1950s). When i was little, some of my favorite memories wer...