I’ve been waiting for four or five years to see the result of this cross! I’ve wondered… is the spotting on Fa’s Marbled Moss the same, in kind and/or in genetic control, as the spotting on roses such as ‘Marbree,’ ‘Alain Blanchard’ and ‘Song of the Stars.’ I made the FMM x ‘Song of the Stars’ cross and got seven seedlings, two of which did not overwinter. The other five are only producing buds this year for the first time.
And here it is! I think I shall call it “42” since it’s giving me answers, at least partially, to that vexing question!
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Here is a picture of it with its parents, seed parent “Fa’s Marbled Moss” (left) and pollen parent ‘Song of the Stars’ (right).
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Here are three petals, one from each flower, showing a close up of the spot.
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My original question was, are the types of spotting found in FMM and the others created by the same genetic mechanism, or a different one? My hypothesis was that the genetic mechanism is different, because the spots on the two types of petals are distinct in two ways:
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FMM’s spots are large and involve the entire cross-section of the petal, front and back, while the other spots seem to be, in the main, surface markings; and
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FMM’s spots are distributed randomly–some petals have two or three spots that cover virtually the whole petal, other petals on the same flower may have none at all, while the distribution of spots on the others is relatively uniform in both size and distribution, both on individual petals and on whole flowers.
Now I’m wondering if what I’m seeing is the rose equivalent of the Leopard (Appaloosa-spotting) gene in horses. There is one gene which says, “You will be spotted,” and many others that say, “And you will be spotted in this particular way.” They way to find this out, of course, is to allow 42’s flowers to self pollinate and see if I can get the parental spot types, and only those types, to appear on any of the offspring.
Sorry for blathering, this kind of thing is very heaven for me! In any case, I have a beautiful new rose!