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Post by prairiegardens on Apr 7, 2020 20:46:36 GMT -5
Anyone know anything about these things? www.gardeningknowhow.com/edible/vegetables/potato/hairy-potato-pest-resistance.htmApparently they are not really edible, but crossed with a "normal" potato they are, but supposedly retain the qualities of pest resistance. There are supposedly two crosses available now, "Prince Hairy" which takes ages to mature ( 140 days) and King Harry which takes from 70 - 90 days. I've never heard of this before and never heard of those varieties either, anyone know anything more?
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Post by nathanp on Apr 7, 2020 21:20:25 GMT -5
Anyone know anything about these things? www.gardeningknowhow.com/edible/vegetables/potato/hairy-potato-pest-resistance.htmApparently they are not really edible, but crossed with a "normal" potato they are, but supposedly retain the qualities of pest resistance. There are supposedly two crosses available now, "Prince Hairy" which takes ages to mature ( 140 days) and King Harry which takes from 70 - 90 days. I've never heard of this before and never heard of those varieties either, anyone know anything more?
Yes. I'm currently working with a few lines with these. The general summary is that there are trichome hair traits that have been introgressed through traditional breeding methods, from S. berthaultii (wild potatoes) into S. tuberosum. The two most prominent commercial releases are Prince Hairy and King Harry. This provides a measurable, but variable resistance to pests like CPB. There are two trichome hair traits (called Type A and B trichome hairs). One is longer than the other, the other shorter and denser. One type also can produce a sticky resin that can affect CPB movement and any significant resistance requires all three of these. Type A and B trichome hairs without the resin are not sufficient to provide measurable resistance. King Harry is the only potato I am aware of that is currently available in the US with these traits. I am not aware if there is a source for Prince Hairy. Some people who eat them complain about an 'off taste' to them that is not present in other potatoes, but I have not noticed. The other key resistance being used in breeding programs is from some specific S. chacoense lines that have two glycoalcaloids, called Leptines I and II, in the foliage, but not in the tubers. These also are being introgressed into tuberosum. Ideally, a few programs are intending to try to combine the Leptines with the trichome hairs to offer potatoes with both types of resistance. No commercial potatoes with Leptines have been released thus far. Genetically modifying (bioengineering) these traits likely will speed up the process of bringing potatoes like this to market at some point. For further reading, here are some references: Link to tatermater forumIntrogression of trichome hairsWalter de Jong quote in KPPWalter De Jong: The pubescence on the cotyledons is from trichome hairs. Whether the density on cotyledons correlates with density on mature leaves, I don't know. For good insect resistance, density alone isn't sufficient - the trichomes need to make the right metabolites to deter and/or entrap insects.Kenosha Potato Project search for CPB resistance: KPP Discussions |
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Post by nathanp on Apr 7, 2020 21:27:58 GMT -5
King Harry is sold in the US by Wood Prairie currently. Wood PrairieIf you have Facebook, this post has some photos of the trichome hairs on a seedling from the USDA accession # GS 397. link |
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Post by diane on Apr 8, 2020 12:03:24 GMT -5
I had to google - now I know what CPB is. Colorado Potato Beetle
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Post by prairiegardens on Apr 8, 2020 13:21:34 GMT -5
King Harry is sold in the US by Wood Prairie currently. Wood PrairieIf you have Facebook, this post has some photos of the trichome hairs on a seedling from the USDA accession # GS 397. linkThank you for all this information! All this stuff going on out there! I love this community, figured if I was going to get any info someone here would know; and hey presto!  Unfortunately Wood Prairie only ships to US addresses and I am in Canada. I am going to email to ask if they would sell me a few TPS but I'm not really sure if they would want to be bothered, or whether they might think that doing that might somehow rebound on them. I THINK that in the event the border police seized them I would be out of the cash but that would pretty much the end of the story. Usually we can import seeds without problems, I've never had an issue, but it all depends on how officious someone is, perhaps. A few years back I was mailing out some seed and had a postal clerk tell me that it was illegal to import seeds. I wondered if she had been busy seizing packets of seed or if she was just confused and thinking of marijuana Plants or tubers are a different story and do need a phytosanitary certificate, (so I couldn't have got them even if they had been willing to ship to Canada) which is a ridiculously expensive hurdle to jump through. It seems only to apply to the small orders so it's pretty much just a government control/money thing. I've seen truckloads of plants brought in from the US and clearly they hadn't all been inspected as several that I saw were obviously sick or/and infected with bugs. If they aren't going to be careful with the plants the big box stores bring in then the whole exercise is useless. Anyway, thanks for the info, it's really interesting. |
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Post by nathanp on Apr 8, 2020 23:15:08 GMT -5
Yes, you will have difficulty legally importing any potato material. Your best bet may be to locate one or more of the following varieties. I have seen documentation that the following have preferential feeding resistance, meaning that if given a choice, they are not preferred by CPB. You could potentially grow a trap crop of a traditional potato with no resistance, and then grow one or more of these with the intent of saving these for eating.
Elba - has some level of moderate resistance
NorValley - two studies determined: 50% reduced defoliation and Reduced defoliation levels
Dakota Diamond - 23.3% of genome is from wild potatoes. Has andigena, demissum, phureja and chacoense
Dakota Pearl - perhaps a long shot, but is related to Dakota Diamond and may have some resistance
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Post by diane on Apr 9, 2020 12:23:37 GMT -5
I just checked the Seeds of Diversity website to see which of those potatoes are sold in Canada and only Dakota Pearl is - from Eagle Creek Seed Potatoes.
They say it has good resistance to scab.
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Post by prairiegardens on Apr 9, 2020 15:25:27 GMT -5
Parkland Seed also has it but I can't so far find out if they sell to individuals, not the type of company I normally patronize. Eagle Creek is out of stock...
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Post by diane on Apr 9, 2020 19:20:01 GMT -5
There are a number of Seeds of Diversity members offering potatoes in the Members' Exchange
Interesting potatoes I've never heard of - from Norway, Germany, Holland - but not the ones mentioned above.
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Post by nathanp on Apr 10, 2020 10:03:59 GMT -5
One suggestion that was made on the Kenosha Potato Project Facebook page about this was:
They might try the Federal Ag Research Station in Fredericton, NB. They're really good to deal with. They ship tubers or in-vitro plantlets. Expect to pay roughly 60CDN for shipping by courrier.
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Post by jocelyn on Apr 13, 2020 7:06:50 GMT -5
If one plant is furry and there are 4 non furry ones next to it, and only the furry one is not defoliated, is this what you mean?
I did have a furry blue seedling last summer, and I was away for a bit and the CPB ate the smoother leaved ones, but not the one furry one.
Should I take pictures once it comes up again this spring?
I will share, if it is what you mean. I'm on PEI, east coast of Canada.
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Post by nathanp on Apr 13, 2020 9:23:00 GMT -5
If one plant is furry and there are 4 non furry ones next to it, and only the furry one is not defoliated, is this what you mean? I did have a furry blue seedling last summer, and I was away for a bit and the CPB ate the smoother leaved ones, but not the one furry one. Should I take pictures once it comes up again this spring? I will share, if it is what you mean. I'm on PEI, east coast of Canada. Not exactly, though some of the hairiness may be similar or shared. Nearly all potatoes have trichome hairs and often some of them are visible, but they do not necessarily impact pest resistance, nor does the density of the trichome hairs necessarily mean greater resistance. These Trichome Hairs A and B are specific traits found in a few wild potatoes that have been identified and brought into only a few tetraploid S. tuberosum commercial lines. Having Trichome Hair A without B, or vice versa, also is not enough to significantly deter CPB. There may be some preferential feeding involved, so it is not necessarily resistance. I find a great deal of variety in what is eaten each year, but there are some lines I have identified that seem to be bothered less, and others that get mowed down. Studies have found even the amount of resistance with lines that have these traits varies greatly each year with the same varieties. Feel free to take pictures though. If you do notice preferential feeding or avoidance, there could very well be something present that is undocumented. Any idea what the parent of that one was? |
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Post by jocelyn on Apr 13, 2020 10:21:28 GMT -5
it was a russian blue open pollinated seedling, father unknown and many possible.
I got 2 tubers from it, so will be replanting. There were 4 superior seedlings next to it and they got bared off to just stems.
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Post by RpR on Apr 17, 2020 19:27:42 GMT -5
I have grown King Harry several times.
It is totally resistant to CPB .
Last year I grew a large number of hills of potatoes; CPB arrived briefly and really only hit the potatoes that were carry overs from the year before.
I had no King Harry last year but he CPB seemed to just disappear, there were no Lady Bug larvae which often zap them, which has never happened before.
The new varieties were pretty much untouched even though they were the largest plants.
New varieties grown last year:
Butterfly
Lily
Harvest Moon
Purple Peruvian
Gourmetessa
White Giant
All Blue
Peruvian Sunrise
Chipperbec
All pretty much left alone by beetles, and as I have fought them often the past ten years, that they did little damage, without Lady Bugs, was amazing.
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Post by nathanp on Apr 18, 2020 17:47:48 GMT -5
I have noticed preferential feeding habits for different potatoes. Last year in two of my fields I did nothing to prevent or respond to CPB. It might be a bit anecdotal, but I find many of those with better taste are usually the first ones to be heavily eaten. I am fairly content to let nature take it's course and enjoy seeing the predators moving in.
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