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Post by DarJones on Apr 16, 2015 7:24:57 GMT -8
As with many discoveries, the entire horizontal/vertical resistance paradigm is being replaced with something that better explains the interactions. The overall concept that single gene resistance is an invitation to disaster is valid. However, there are counterexamples.
Strobilurin is produced by mushrooms to inhibit growth of other fungi nearby. Strobilurin can be extracted and used as a fungicide on vegetable crops such as tomato. The method by which strobilurin blocks fungal growth is deep in the core biopath of most fungi. This is an example of a single gene product that produces durable effects.
The potato R gene complex is a good example of the opposite effect. Each R gene provides a genetic lock that is easily overcome by late blight. Even stacking multiple R genes into a single variety will eventually fail as late blight can adapt to any imaginable combination.
While I don't advocate doing so, consider what would happen if the gene for strobilurin was transferred into a potato so that the leaves produced strobilurin. This should give a potato that is harmless to humans yet has durable resistance to late blight. This highlights the potential benefit of GMO's. Keep in mind that GMO's come with a wealth of hazards that also must be considered. What if we find out that strobilurin also blocks beneficial soil fungi that potatoes need in order to live?
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Sheila
New Member
Photo, 49 yrs. old, My brain, 18, but smarter!
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Post by Sheila on May 25, 2015 13:59:54 GMT -8
Lets say that the gene for strobularin was transferred into a potato so that the leaves produced stobularin, would it also be in the potatoes? If someone was allergic to mushrooms, could it then be toxic to someone that's allergic to them? Or tomatoes or even the ground that vegetables are grown in from then on? Ever since I read an early study of GMO's, before most even knew about them, they scared me to death. I try to have a very open mind about them, but it always seems to come back as a huge NO, to me. I guess it's the never knowing until something terrible happens, that I hate the most about the issue of GMO's. We have had way too many examples of what goes wrong, 20 years later, for me to trust them. My only prayer is, that we learn a whole lot more about them, before we ever use them, more than we already do.
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Post by Tom Wagner on May 28, 2015 19:45:10 GMT -8
Strobilurus tenacellus commonly known as the pinecone cap, The mushrooms, sometimes described as edible, are too small to be of culinary interest. The fungus releases compounds called strobilurins that suppress the growth and development of other fungi. Derivatives of these compounds are used as an important class of agricultural fungicides. Interesting that this mushroom is described edible....to whom? I suppose if it were to be inserted into the genome of a potato the protection against various fungal groups would be exploited by the GMO folks. Whatever allergy one may have to any mushroom species would be a concern.
Strobilurins one of the most widely used fungicides due to their versatile utility and effectiveness against a number of fungal diseases.
There are many chains of strobilurins which would necessitate allergy reactions to humans. I have no idea if there is any research on allergies based on foliar application on growing potato vines and post harvest reactions. Since I am generally anti-GMO, I am not the right person to address strobilurin questions.
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Sheila
New Member
Photo, 49 yrs. old, My brain, 18, but smarter!
Posts: 17
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Post by Sheila on May 29, 2015 8:54:52 GMT -8
Very interesting, Thank you. I'm VERY anti-GMO myself, and I like to find out whatever I can, however I'm also very limited in my understanding of even a simple cross of any plant, so I am thankful for any information, or opinion, I can read from those that do know a great deal about this topic. Great information, Thank you, Sheila
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Post by *Marches on Jun 22, 2015 14:35:01 GMT -8
Strobilurus tenacellus commonly known as the pinecone cap, The mushrooms, sometimes described as edible, are too small to be of culinary interest. The fungus releases compounds called strobilurins that suppress the growth and development of other fungi. Derivatives of these compounds are used as an important class of agricultural fungicides. Interesting that this mushroom is described edible....to whom? I suppose if it were to be inserted into the genome of a potato the protection against various fungal groups would be exploited by the GMO folks. Whatever allergy one may have to any mushroom species would be a concern. Strobilurins one of the most widely used fungicides due to their versatile utility and effectiveness against a number of fungal diseases. There are many chains of strobilurins which would necessitate allergy reactions to humans. I have no idea if there is any research on allergies based on foliar application on growing potato vines and post harvest reactions. Since I am generally anti-GMO, I am not the right person to address strobilurin questions. Probably edible in the same way say grass is... Whatever doesn't kill you must be edible, if not necessarily digestible or apetising.
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Post by Rizwan Rind on Oct 22, 2017 21:19:49 GMT -8
in vertical its just one gens mean the target organism the resistance from them other horizontal mean multiple and the have ability from many species and the protect from different environmental,disease,pests,weeds ,etc ......when we apply in our fields then we properly know them.....
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Post by DarJones on Nov 1, 2017 3:27:04 GMT -8
It has been several years since this thread started. It is still relevant and very good reading.
I'm making slow progress with introgressing wild tomato genes into a domestic background. I have crosses with LA0417 which is S. Pimpinellifolium that expresses exceptionally good septoria resistance. I have crosses with LA2175 which is S. Habrochaites that expresses multiple resistances including nematodes, septoria, and late blight.
I need a lot more years growing out the progeny to get stable combinations.
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Post by Tom Wagner on Nov 2, 2017 18:08:51 GMT -8
Thanks Dar
Someday I will get more active on this site. I need to coordinate my Iphone and laptop to do that.
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