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Post by Tom Wagner on Jul 17, 2012 20:31:34 GMT -8
Looking for frost resistance in all the wrong places. tuberosa (cultivated) ajanhuiri 2 collections 24 chromosomes...EBN= 2 ? S.PERU and N.BOL 3800-4100 meters altitude www.cgn.wur.nl/UK/CGN+Plant+Genetic+Resources/Collections/Potato/-+Species/documents.plant.wur.nl/cgn/images/potato/AJH.jpgThe photo below is from the Dutch site showing the ajanhuiri  The photo below is me trying to find viable pollen from a supposed ajanhuiri in Seattle. I selfed a few flowers since none were setting berries. and cross what little pollen I had to some F-2 Skagit Magics...diploids and used the ample pollen from an F-2 Skagit Magic I called Magic Erin to the ajanhuiri. Good news; the clone appears identical to the Dutch clone. I am making some test crosses and will report back later.  Confusing data but it seems to be a hybrid between stn. and mag. Solanum x ajanhuiri Juz. & Bukasov SYNONYM(S) : Solanum tuberosum L. (Ajanhuiri Group) AYMARA : Ajahuiri. ENGLISH : Diploid potato. QUECHUA : Kakahuiri SPANISH : Ajawiri (Bolivia), Papa ayanhuiri (Peru), Yari (Bolivia). 2 varieties / cultivars are mentioned in the Catalogue of Bolivian varieties by PROINPA : 'Janq'o Ajahuiri' & 'Lunku Ajahuiri'. Photograph of various cultivars kindly provided by La Casa del Corregidor, Centro de Encuentro Cultural, Peru, in our special gallery. __Below are some lines I have had years ago from GRIN. The Jancko ajawiri as recent as 2009 with no berries produced.______________________________________ • PI 599279 LARAM AJAWIRI www.neiker.net/neiker/papasalud/Fichas/NKD138.pdf not that it is purple skinned. • PI 599280 JANCKO AJAWIRI www.neiker.net/neiker/papasalud/Fichas/NKD139.pdf• PI 611096 YARI BLANCO I can attest that the above clones are not like the one I crossed today. --------------------------- The whole effort is to implement the frost resistance of ajanhuiri to lines that produce many beries so that I can find the real frost resistance and provide TPS to folks. |
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Post by wingnut on Jul 18, 2012 8:53:21 GMT -8
What is the difference between these and a phureja type diploid?
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atash
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Learning from my mistakes since 1964
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Post by atash on Jul 18, 2012 10:25:08 GMT -8
S. x ajanhuiri is reputedly an accidental hybrid that originated in fields where S. stenotomum was crossing to wild S. megistacrolobum.
There are reputedly 6 clones among the Amerinds who intentionally grow it for its frost-resistance, among which 2, one purple and one white, are non-bitter. The foliage reputedly takes down to -5C. Interestingly, the tuber also seems to have some freeze-resistance, being able to overwinter in climates where potatoes don't normally.
Assuming we have correctly guessed its ID in the first place, mine is the purple. Deep black-purple, like some of Tom's, though unfortunately not as uniformly-saturated. It would be good to cross it to some of his deep-saturated purples if the cross takes.
It has small, dense, waxy tubers that store surprisingly well for their small size. They came though the winter in fine shape. They are the size and shape of fingerlings except that they have odd-looking protuberances sticking out at right angles here and there.
Mine looks similar to the one in the photo from the Dutch website, but I think healthier-looking. Mine was probably de-virused some time before I got it, and is still going strong.
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atash
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Learning from my mistakes since 1964
Posts: 96
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Post by atash on Jul 18, 2012 11:50:30 GMT -8
Wingnut, I guess I didn't answer your question explicitly. The difference is that S. x ajanhuiri is believed to have some wild ancestry. It's not a real species, but a hybrid, so don't expect it to be radically different. It does have some nice traits, though, including keeping well for a small tuber, tubers high in solids, and frost resistance.
The two big drawbacks I am aware of are that it is late to start making tubers (reputedly--I haven't actually checked mine) and that it is pollen-sterile. Nevertheless, Tom was able to SQUEEZE some pollen out anyway. Not much, and we don't even know if it is viable.
Oddly it has never been used much for breeding work.
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Post by wingnut on Jul 18, 2012 14:11:09 GMT -8
Could you direct me to where you read the above info? I seem to have a hard time finding a key to the different diploid "SPECIES". thanks
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atash
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Learning from my mistakes since 1964
Posts: 96
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Post by atash on Jul 23, 2012 22:58:37 GMT -8
Could you direct me to where you read the above info? I seem to have a hard time finding a key to the different diploid "SPECIES". thanks You'll have to follow me to the campus of the University of Washington. I can't read some of the online journals off-campus; they only make themselves available for on-campus reading. Technically, it's believed to not be a species, but a hybrid. It probably won't breed true, and we don't need it to. We just want the frost-resistance and the good keeping quality. We'd like to get rid of the pollen sterility and reputed late tuberization. Tom, so far so good. I don't think your selfing took, and at first I didn't think your cross-pollination took either, because several blossoms fell off the shoot that you did. But I noticed that 3 blossoms that have not fallen off are missing their anther cones. I wasn't paying attention to how many you did but obviously those 3. Let's hope. I think I should do some more of them, so that we have plenty of berries. Plus, there are now more blossoms to work with. |
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Post by wmontanez on Jul 24, 2012 5:05:33 GMT -8
What a shame that is not-online, generally if you are a student you can access the university journals or papers online by using your student email.
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Post by wingnut on Jul 24, 2012 7:18:27 GMT -8
Rob if you have the time you should pollinate each morning, will GREATLY increase your berry count!
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atash
Junior Member
Learning from my mistakes since 1964
Posts: 96
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Post by atash on Jul 24, 2012 21:51:23 GMT -8
WMontanez, I had the same idea and gave it a shot. They intercept the IP address and can tell that it's not on-campus.
You're right, wingnut, thanks. I need some tags but I'll start making more crosses now that I have Tom's technique still fresh in my brain, and lots of flowers to work with.
Tom has two specimens that I gave him, and they have buds on them, so he can make more crosses. I think he wants to try some tetraploids.
Wingnut, by the end of the year I'll have spare x ajanhuiris, so you should have a few. I promised some to Trixtrax too. I'd like to eat at least one to see what they're like, and I'll save the rest. Better get a good crop to fulfill these needs, but they are vigorous plants so far so I am cautiously optimistic we'll have enough. I will probably remember, but feel free to remind me.
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Post by wingnut on Jul 25, 2012 7:37:07 GMT -8
Thanks, it would be a great addition to the collection. And with all the different genetics here, I should be able to produce some berries......I do have a handful of plants I have yet to get berries on though.
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atash
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Learning from my mistakes since 1964
Posts: 96
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Post by atash on Aug 11, 2012 15:46:40 GMT -8
 This is x ajanhuiri x purple-flowered Skagit Magic seedling. It's about the size of a pea. There are several more that I did later using the white-flowered SM seedling, deciding if they're going to take or not. This was after Tom showed me how to do it. Only one berry for the purple-flower cross. I should have started earlier so I'd have more berries. Unfortunately, I am now out of x ajanhuiri blossoms. Next year I'll start them at the same time and do a lot more crosses. I'll have more x ajanhuiri plants to supply blossoms, too, and if we're lucky, some hybrid seedlings. Now we really need that greenhouse space. I think I could do a tomato blossom as well. I recall that Tom showed me that you pollinate them when the petals are just starting to show. I'd like to cross some early ripeners with something like Skykomish, to try to get late blight resistance in an early tomato, to get tomatoes suitable for this confounded cool, damp climate. Maybe I can help Tom make crosses, since I'm closer to the plants in my own back yard. I can do a few every morning. |
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Post by samyaza on Aug 18, 2012 14:07:23 GMT -8
This is x ajanhuiri x purple-flowered Skagit Magic seedling. It's about the size of a pea. There are several more that I did later using the white-flowered SM seedling, deciding if they're going to take or not. Great ! I hope you'll get interesting results. I couldn't try a cross with another diploid because I was absent during the week when they were flowering. I don't remember other diploids flowering at the same time, anyway. It was early in the season. I purchased a variety sold as S. x ajanhuiri this year. They look like on both the pictures of the shop and the CGN website, the size is thinner than one of my fingers, and they already start to wither. I dug one with my finger and rubbed the skin, it didn't peel. I'm very surprised as they're really early for pure Andean potatoes. I'll try to be vicious and plant several of them in spring 2013, long before the last frosts, to see what they can stand. No berries, unfortunately. |
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atash
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Learning from my mistakes since 1964
Posts: 96
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Post by atash on Aug 19, 2012 9:47:25 GMT -8
Do you have some of Tom's recent breeds of diploids? They're good bloomers. I started mine after the x ajanhuiris but they caught up quickly and have bloomed longer. There would have been plenty of time if I had planted them at the same time, and started the process earlier.
Reputedly there are 6 cultivars, only 2 of which are non-bitter, one white-fleshed and one purple. But I wonder if they have been in cultivation in Europe long enough to have diverged a little. Yours don't look exactly like mine. Mine have more irregular shape, and more saturated flesh color.
They are more common in Europe than here, and come under several similar names. Here they are very rare. I was lucky to stumble onto these; I bought them from someone who got them as passalong plants.
I've heard a few people, especially at high latitudes, complain that they are late, but I'm wondering if that just means they're not early. It's still August, which means we haven't hit the equinox yet. I should feel around under mine and see if they have any tubers yet. If they have tubers before the equinox, then they don't absolutely require short days. I bet I do have some tubers as the plants are showing signs of senescence.
I suggest cross-pollinating them by hand. Even if you plant a pollen-doner next to them, they don't interest bees sufficiently to produce berries without human help. They offer no nectar and not even pollen, so there's nothing to interest the bees.
Every berry I have is the result of a hand-pollination, and even about half of those didn't take.
It's inconvenient to use a plant that isn't a particularly good berry producer, as the mother plant. That's one reason I'm anxious to get some of its good qualities into offspring that hopefully are more fertile both in terms of pollen and berries.
I'd like to confirm the frost tolerance as well. That's tricky here, because frost is rare once it dries out enough for potatoes. Might need to start one in a pot out of season, then put it outside.
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Post by samyaza on Aug 19, 2012 13:36:59 GMT -8
Here, the problem is you don't know what you'll get. Normally, we plant the first tubers on mid-March, because hard frosts are past, most of the time. There's at least a night with a real risk of frost, but we hill them up a bit the day before and all the stems covered with soil don't take it and they start growing again quickly. Frosts down to the famous -5°C are bad luck but it occurs, sometimes. The worst is when it lasts too long. The other thing is, sometimes, it's still not warm enough at that time of the year for potatoes. For example, this year, it took 3 weeks to pre-sprouted tubers before we could see green come up from the ground. It was so long we thought they'd never appear. In fact, there's always a risk of something uncommon. So, I don't think I'll plant S. ajanhuiri as early as February, not because of too hard frosts ( it's just a few to test ) but of too cold weather. |
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Post by samyaza on Sept 8, 2012 13:23:39 GMT -8
Sorry to be late, here are pictures taken on August 24th :    And the most important...  Imagine my reaction... I collected its seeds in a paranoid way, in fear to leave a single seed to the water ! ;D I tasted a little tuber : not bitter at all ! And see the size !  |
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