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Post by samyaza on Dec 6, 2011 11:14:31 GMT -8
Hello. I just heard of Acaphu potato variety (information here). S. acaule x S. phureja must be the most direct bridge for traditional breeding between sexual incompatible disomic tetraploid S. acaule and tetrasomic tetraploid S. tuberosum gene pools. |
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Post by Tom Wagner on Dec 6, 2011 23:45:38 GMT -8
Interesting searches for Acaphu aside.....I can't find anywhere that Estrada kept the line going from 27 plus years ago. About the only potato readily available with S. acaule in the pedigree is Alaska Frostless and it has 60 chromosomes (5x) and I've never gotten TPS from that clone. Acuale has 48 chromosomes and it must be hard to cross otherwise....i think all of my crosses with acuale met with failure, but I don't keep good records of my failures. I have lots of TPS of various acaule accessions....most recently 2007. You could run a lawn mover over the vines....they were so low growing....the berries formed at ground zero. The acuale lines are tough to get any tubers worth keeping or even trying to keep...to small and day lenght sensitive. The Acaphu was developed in Colombia or Puru...not sure...and I could not find the clone or offspring via CIP or Grin. It does not show up in any pedigree data base that I have access to. I think S. acuale plants are cute....see below  As I go thru my seed inventories...I may try to list an acuale line...they would make great ground cover plants in a bed or pot. Who knows? Maybe a clone or two would show up with some tubering potential. |
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Post by samyaza on Dec 7, 2011 4:43:45 GMT -8
Acaphu is tetraploid as written here, made from unreduced S. phureja pollen. I'd like to try it myself, especially with productive varieties. I have late frosts to test both the parents and the results  The problem with pentaploids as Alaska Frostless is the same that with triploids : they're rarely fertile. In addition, I remember reading a study about it that said it wasn't so frostless... You can't just make a somatic cross of S. acaule with potato, keep the most productive and say "ok, now it's frost tolerant", there's a lot of selection to do with it. If you read this article, you realize hybridation between different species of potatoes is a more complex thing than we think. |
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Post by jak on Dec 7, 2011 20:00:54 GMT -8
Solanum megistacrolobum looks nice too!  |
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Post by Tom Wagner on Oct 6, 2014 3:13:17 GMT -8
I need to bump this thread and make the postings more relevant for the future. My webmaster and friend, Rob Wagner made some acaule x diploid crosses and has TPS of several separate crosses using Skagit Valley Gold for one. With Acaphu providing some indication of what to expect from the TPS, tetraploid rather than Tripoli, one must still figure on alkaloids being extreme in type and levels.
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Post by stevecrouse on Oct 9, 2014 1:08:37 GMT -8
Trying to keep all these numbers about chromasomes, ploidies, genes, and such makes my head hurt.
I do have a knack for remembering some things though...............
Last year I raised about an acre of Papa Cacho. They were planted around the middle of June, and when I began the process of dessicating the greenery, I ran into problems.
They wouldn't die. I beat the tops off and sprayed a desicant a second time with no luck.
We had numerous frosts down to at least 25 deg F and they just kept coming back.
Finally, on the second of November we started digging them. It was 22 degrees that morning and the ground was frozen so hard that I had to break through it with the tractor front wheels in order to get the digger point into the ground. We literally picked those tubers out of the frozen crust.
I store my potatoes in one ton bulkbags, and I kept a very close eye on them thru the winter.
They kept rather well.
If your are looking for something that's frost hardy, You might try Papa Cacho.
As a side note, this year, I planted P.C. with no fertilizer as a test plot and compared to the fertilized plot, the unfertilized are doing much better with less tuber set, but much better type and size.
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Post by Tom Wagner on Oct 9, 2014 22:11:19 GMT -8
Steve, thanks for mentioning Papa Cacho, likewise I concur with your comments about the frost hardiness, late vigorous vines, frost resistance, and its usage of nutrients, probably due to a vigorous root system. I will make a special topic point just on Papa Cacho since it is going to be an increasingly popular specialty potato variety.
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