I’ve been reading Mr Moore’s article on striping again, trying to understand the nature of striping and how it may be inherited. If I’m correct in my understanding, Mr Moore selected ‘No. 26 Stripe’ and ‘No. 14 Stripe’ from 29 seedlings obtained from a an F1 cross between ‘Little Darling’ and ‘Ferdinand Pichard’… indicating that stripes may be somewhat dominant because it reappeared in the first generation (is this kind of correct… not taking into account individual cases… only looking at generalisations atm or was it it due to an individual case that enabled the expression of striping in the F1 generation?). From then various crosses were made (while a lot failed to produce striping) and one with ‘Little Chief’ resulted in ‘Stars n Stripes’… from which most of our striped cultivars come from. Is this right so far?
I’ve been collecting striped varieties descendent from, and including ‘Stars n Stripes’ to try for some striped roses… I’d really love to make striped healthy shrub roses with Teas. In my collection is a rose bred by Sam McGredy called ‘Papageno’ (see link). I bought this one because its pollen parent was a striped seedling with ‘Stars n Stripes’ as its pollen parent. ‘Papageno’ is nicely striped and I assumed the striping came directly from ‘Stars n Stripes’. I’ve had ‘Papageno’ for a few seasons now and it forms masses of OP hips… so taking people’s advice on here I collected a lot of them to test germinability with the intention of using it as a seed parent to create striped roses. I germinated about 100 seedlings (very easy to germinate seeds… I got about 90% germination from it and they were the first seeds, after the multiflora rootstock seeds, to germinate). Not one of the seedlings has turned out striped. They are all reds, oranges, and hot pinks and about half of them are white on the reverse. One really lovely one is an red colour with an orange reverse. They are lovely strong colours but none are striped. The unusual bud I posted earlier is almost open now and the green striping is, as Robert said, only on the guard petals. The rest is a rich red with a white reverse. I’ll be checking it over carefully for even the faintest stripes when fully open but so far I can see none.
So, I’m a little confused about the inheritance of stripes given that Mr Moore got stripes in his first generation with FP. Out of about 100 seedlings I can understand getting a small percentage of stripes because I assume non-striping would also be present, possibly in a larger dose than striping… but am having trouble understanding how/why 100% of them have turned out solid coloured? 100 is not a terribly large sample size but it isn’t that small either. My new little ‘Stars n Stripes’ is about to flower and I hope to play with it a bit but am keen to use ‘Papageno’ because the seedlings are super vigorous, so far healthy, seem to grow easily on their own roots, and have beautiful flower form. This one, below, is the first flower of one of these seedlings and the colour is pretty accurate.
The little curled bud below it is the red with orange reverse I mentioned and is part of the same batch of seeds. I’ve culled them down to about 10 seedlings now and they just seem to get stronger and stronger. The larger flower in the photo above has a a lot of petals for a first flower I think and really nice form for its first flower and it will be interesting to watch it as it ages…
So can someone explain to me how this works because I was expecting at least one striped seedling from the bunch… especially from an OP batch of seeds that I assume is mostly self pollinated. Does striped rose x striped rose not result in many striped seedlings?
My other striped roses to try are ‘Stars n Stripes’, ‘Soaring Spirits’, ‘Honorine de Brabant’, ‘Maurice Utrillo’, ‘Paul Cezanne’, and ‘Red Intuition’. The last three are a different bunch of striped roses that may or may not be linked back to FP… they are Delbards and their parentage is not listed… I’m assuming their striping is from sporting or some other origin until I see the first flowers from them (and their seedlings are so far weak).
Thanks in advance.