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Post by DarJones on Apr 6, 2015 21:22:14 GMT -5
Most commercial potatoes have type T cytoplasm which leads to cytoplasmic pollen infertility. This is not the same as self-incompatibility. The first key to tetraploid fertility is to ditch the type T cytoplasm. The second step is to get multiple SI genes into the population.
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Post by nathanp on Apr 6, 2015 22:32:21 GMT -5
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Post by keen101 (Biolumo / Andrew B.) on Apr 24, 2015 16:12:49 GMT -5
Im new to all this potato breeding through tps stuff, and i havnt read rebsie's book yet. But, are diploid potatoes easy to get a hold of and easier to breed?
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Post by nathanp on Apr 24, 2015 18:25:17 GMT -5
Yes and no. You have to go to non commercial sources, or the USDA, or trade with people who have them. Nearly all commercial varieties are tetraploid. I would be willing to do some trading in the fall if you are interested. I should also add that TPS of many diploid crosses was available until recently at Tom Wagner's website. www.tatermaterseeds.com/shop/Looks like you just missed being able to buy that this year. |
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Post by raymondo on Apr 28, 2015 18:04:23 GMT -5
Well, taking all the above info into consideration (thanks everyone), it seems a worthwhile project. Sadly, importing potato germplasm is not possible for a home gardener in Australia as the quarantine costs are prohibitive. Not to worry. I have three lots of seed from different parents and a couple of supposedly fully fertile cultivars so I think I have all I need to start the project off. Once I have some clearly fully fertile plants to work with (I'd like to see clouds of pollen) I can start crossing into some of the commercial cultivars that I like and check the offspring for viable pollen. I suppose I should assume that any of the offspring of such crosses that produce no pollen probably have cytoplasmic male sterility and should be dropped from the gene pool.
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Post by DarJones on Apr 30, 2015 18:32:10 GMT -5
Not entirely correct Raymundo. Potato flowers drop pollen out of a hole in the end of the stamen. Some varieties don't produce the hole even though there is pollen that could be shed. While you may not get any pollen, it is not necessarily from cytoplasmic sterility.
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Post by philagardener on Apr 30, 2015 19:49:21 GMT -5
So if you dice up that stamen, DarJones , can you transfer that to effect a cross? (I am sure you have tried this :>)) |
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Post by keen101 (Biolumo / Andrew B.) on May 8, 2015 17:33:16 GMT -5
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