3/4 native tetraploid 1/4 Hybrid Tea

Thanks Max but I think the window of opportunity has passed for any ‘Lynnie’ pollen. I appreciate the offer though.

Just FYI about pollen, using your finger is obviously fine - I do that too sometimes. Lately though, most often, I’ll just collect a bunch of ready to open buds and pull off all petals and the five green calyx pieces, so that all that is left is a little brush of anthers on the end of a stem. I leave these to dry (and anthers to bust open) in an undisturbed place and then just use these as preloaded, disposable, “pollen brushes”. Depending on what pollen parent you’re working with you can easily pollinate a couple of emasculated (or not) flowers with each “brush”. These can also be dusted onto a small mirror, so that the pollen can be scraped with a razor blade into storage containers. My favorite way to store is in gelatin capsules. These are then kept within another container that has silica gel for mositure control. They can be refrigerated or even frozen this way.

Simon, yes I was pretty surprised at how much Hybrid Tea influence came through in the flower of ‘Fragrant Cloud’ X carolina. The plant itself definitely is more intermediate in appearance, maybe even more like the species. That’s an especially interesting point that carolina (and wichuraiana and virginiana as Jadae added) seem to blend well with the moderns. Makes me wonder how intercrossed hybrids of these (wichuriana X virginiana for example) would behave as parents. I guess that would probably be triploid, but would it maybe allow even more of the modern influence show than each species individually does???

3/4 & 1/4

First: Very nice roses with brilliant already visible traits … .

Indeed: I haven’t read all the text but the calculation is not forcibly or conclusive for the thought that the genes will spread in the mentioned variations.

Grx.

Arno

Thanks Arno.

Good point. I totally agree if I’m understanding what you meant. By fractions of ancestry, it is 3/4 and 1/4, but the ‘Fragrant Cloud’ X carolina hybrid could certainly produce gametes with varying composition. Some of these could be nearly completely modern and some could be nearly completely carolina derived, with all combinations in between also.

A perfect example of this that I’ve witnessed is:

bracteata X (rugosa x palustris)

While these seedlings could be considered 1/4 rugosa or 1/4 palustris by ancestry, it is very obvious that the pollen produced by rugosa x palustris contained varying proportions of genes derived from the two species. Some of the offspring look like what one would expect crosses of bracteata x rugosa to look like, while others show hardly any rugosa influence at all but instead show a strong influence from palustris. Of course most of the seedlings showed influence of both of those species.

It’s fascinating to see how wildly different siblings can be, especially coming from advanced generations (beyond F1)of species crosses.

Thanks again, Tom

Howdy Tom

I noticed that your Fragrant cloud x R. carolina foliage is grey green, I have at the moment Sympathie x R. virginiana seedlings which germinated last month showing the same colour of foliage. Is this foliage colour trait a common occurrance when crossing R. carolina and R. virginiana with moderns or other species?

cheers Warren

Hi Warren,

I see what you mean about the grey green foliage, but I haven’t payed that much attention to it. Thanks for bringing that up - I’ll have to check some other hybrids for it. If I had to hazard a guess, it seems to be a fairly dominant trait of the clone of carolina that I have. Another F1 hybrid with gallica also has that foliage color but then again the gallica was also fairly dull matte green. The virginiana clones I grow are all more shiny (not that dull, matte, grey-green) and their hybrids follow after them in also being more shiny. The 3/4 hybrid at the very top of this thread is a good example of this shiny-ness.

Cheers, Tom

Hi Tom

The foliage of the 3/4 Hybrid is fantastic and is what I expected with the crosses that I am doing. With this batch of seedlings around 30% have this grey green foliage, the others are displaying foliage traits similar to your hybrid. I was given a R. carolina which I will replicate that cross with it and see whether the grey green foliage is expressed. I have n’t seen R. carolina growing , but from HMF , it and R. virginiana look very similar, but as I am aware genetically they are different.

cheers Warren