rose chimeras
kevins_choice
22 years ago
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godplant
22 years agolast modified: 9 years agokevins_choice
22 years agolast modified: 9 years agoRelated Discussions
Sports...Which roses have sported for you?
Comments (16)Possible reason why Cemeteryroses' friends has had several sports. This theory was something I read in ORGANIC GARDENING AND FARMING MAGAZINE decades ago when the originator was editing it. Apparently farmers had noticed that there were certain areas in their fields where the plants where known to frequently mutate. Testing showed that in these areas there were (I believe-geophysicists help me out) electromagnetic fields either entering or exiting the earth's surface. And in the " hot spots" the forces were so strong that it encouraged genetic mutations in the plants. Apparently these waves enter and exit in specific areas around the globe. They were detected with suitable meters which registered the increased forces. Sorry I am not more specific on the details but it was over thirty years ago- they ran a series of articles on the phenomenon then it died out. Maybe someone can pipe in with more knowledge of the forces than I have remembered. Jim...See MoreClimbing Rose recomendations....
Comments (10)How lovely! My favorite combo is Aloha & her sport Dixieland Linda (also called Lady Ashe). Aloha is a blend of salmon, medium pink & terracotta & Linda blooms apricot, buff & pastel salmon. Both are identical in form & habit - lush double roses with powerfully rich fragrance & continuous clustered bloom from mid-Spring right through to hard freeze. They have healthy dark green plentiful foliage, pliable canes, grow 8-10' high by 6' wide & are rated to zone 5. In my lazy no-spray garden neither blackspots nor mildews. David Austin has used Aloha to breed many of his English roses. Dixieland Linda is part of the Biltmore collection under the name Lady Ashe. Mine started as own-roots (in gallon pots) which do best in the icestorms we sometimes suffer in Winter, lack of snow cover & numerous freeze-thaw cycles. Three years old now, they're a lush 8'. I don't do anything to protect them over Winter besides leave the last blooms to become hips, put a light layer of fallen oak leaves under them & find little die-back here. They're not usually available at garden centers, so you will likely need to mailorder them (start with gallons or larger) or wait till early next Spring for bareroots. I know you asked for a white climber, but the apricot of Linda pales as the bloom ages to tinted cream & reads antique white, especially in twilight & evening. Some bright white rose blooms age unbecomingly to pale sepia. Unless you're planning a very deep arch (more than 6'), two roses will do fine & be much easier to train over the arch. I've planted potted roses whenever they're available & transplanted garden roses to new locations anytime the ground isn't frozen, even during heatwaves with no trouble, even in a previous zone 6 garden. Sounds like your composted soil will do well - if you grow good vegetables you'll grow good roses. Enjoy! Here is a link that might be useful: both roses...See MoreHelp With Rose I.D.
Comments (7)I followed a link here from the Antique Rose forum, and posted a response there. I'm posting it again here, with a brief addition as to why it isn't a chimera. Chimeras result when an organism is composed of a mix of cells deriving from more than one zygote (fertilized egg). When you have a plant derived from asexual reproduction (as rose cultivars all are -- they are clones of an original plant), then every individual will thus have cells deriving from that first zygote. There may be mitotic errors (mistakes in cell copying) which can result in "sports" as seen in the third pic in the first post, but no plant grown from a cutting will contain genetic information from a different plant than the original (excepting, of course, for plants grown on a different rootstock, but in this case, there will be a delineation between one plant and the other at the graft union -- there will be no single branch or root which contains cells of both plants mixed together). Below is my response on the other thread: It's not a chimera -- that term gets tossed around incorrectly quite often. What this is is an example of a partial reversion or sporting -- there are pictures on HelpMeFind for 'Quatre Saisons Blanc Mousseau' showing similar partial reversions even within one flower. My thoughts on most "sports" is that they are not actually genetic mutations, but rather changes in how the genes are expressed, which is passed on via vegetative propagation (and also breeding, if the change in genetic expression is a result of methylation or a similar epigenetic phenomenon that is maintained in germ cells). The way it would work is like this -- when you see a branch "sporting" to a different flower color, or with the addition of moss, or into a climbing version, what you're seeing is genes present in the plant as a whole which are now expressed to a greater (or lesser) degree because of the arrangement of the DNA within the cells. But the actual sequence of genes remains the same. To give a simple explanation -- think of the genes as a list of ingredients in a recipe. The level of expression would be comparable to the quantities for each ingredient in the complete recipe. When a plant "sports" according to my idea, the ingredients don't change, but the quantities do. So if the recipe originally lists "eggs" and the quantity expressed is usually "2 eggs", a "sport" would result when, for whatever reason, the cell starts putting "4 eggs" into the recipe. This is a normal part of cell differentiation -- all our cells (except RBCs and eggs/sperm) contain all the same genes, but vary in the degree to which particular genes are expressed. This differentiation is usually fixed in most cells, with some exceptions. In plants, there is more flexibility regarding differentiation, allowing us to induce root cells to form on branches. It's probable that this "flexibility" leaves plants more prone to "sporting" than are animals. This change can result from proteins attached to the DNA strand, or methyl-group molecules, increasing or decreasing transcription rates of certain sections of the DNA. These changes can (but not always) be transmitted to offspring produced by sexual reproduction, but are most easily maintained in plants via asexual reproduction (i.e. taking a cutting of the "sported" branch). :-) ~Christopher...See Morethorny rose roots
Comments (2)Hi Kevin if this rose seedling is mutated and thornless it is possible that single shoots "fall back". This is often the case with varigated, dwarfed or hanging/weeping varieties. I have watched a dwarf fir (Picea conica) which all at a sudden sporten common fir branches, a hanging beech (Fagus sylvatica pendula) with a new leader growing straight upright and others. Those mutations occur in regular plant cells from which the "new" form keeps growing. In case of the dwarf fir I could fix it by sawing off the regular branch. I think that you could remove the "wild shoot" of your thornless (seedling?) rose if you want to keep it. If not it is likely that the thornless part gets overgrown by the more vigourus thorny part. Regards L...See Morekeking
22 years agolast modified: 9 years agodavid_zlesak
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22 years agolast modified: 9 years agoLazaro
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20 years agolast modified: 9 years agoJemah Craft
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3 years ago
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