|
|
Post by czech on Sept 17, 2017 9:01:04 GMT -5
Hello, I would like to ask if will have apios americana after the flowering seeds in Central Europe. If not, why is it not fruitful here and multiplies only with tubers? Is it for that we have here no pollinators for this flower? My apios(es?) are not getting seeds yet, and I do not know why. Here in czech republic is this crop wery little planted, and it is hard to search some plants to buy. I am sorry for my english:) and thank you for your answer. I can't serch answer nowhere.
|
|
|
|
Post by blueadzuki on Sept 17, 2017 11:42:00 GMT -5
The problem is that a lot of apios cultivars are triploid (three sets of chromosomes as opposed to two), and therefore sterile. Those are often the ones planted, since the triploid have bigger tubers than the normal diploid kind. Finding fertile diploid types is kind of hard.
|
|
|
|
Post by philagardener on Sept 17, 2017 17:43:44 GMT -5
So does that mean there is a tetraploid lurking out there that was one parent of the triploids?
|
|
|
|
Post by blueadzuki on Sept 17, 2017 18:06:06 GMT -5
I imagine so, though I have never seen it.
|
|
|
|
Post by czech on Sept 18, 2017 1:48:20 GMT -5
Thank you once again for the answer. Another question from me is . what plants would come from the seeds when I would managed to get diploid plants, and they would accidentally cross with my triploids? Or I should eventually remove them for sure?
|
|
|
|
Post by blueadzuki on Sept 18, 2017 6:24:01 GMT -5
a diploid and a triploid plant will not make seeds if they cross. For a plant to make seeds, both parents must have an even number of pairs of chromosomes, since they have to split in half during reproduction (that's WHY the triploid is sterile)
|
|
|
|
Post by walt on Sept 18, 2017 12:35:40 GMT -5
Triploids generally have very low fertility. They are not always sterile.
I got a laugh out of learning that back about the 1960s some of the orchid breeders started started selling only triploid orchids so others couldn't use their breeding lines. But a single orchid seed pod can have thousands of dust-like seeds. Breeders that didn't know any better used them as breeding stock. And out of the thousands of seeds, they were getting maybe 100 seedlings. They didn't even notice the reduced fertility, as they often tossed the growing flasks after a hundred more or less seedlings.
Breeders often use triploids as a step in breeding when a useful gene is not in diploids but is available in tetraploids. But it takes a lot of pollinations to succeed. And in many species, triploids are absolutely sterile.
It will be lot easier to aquire diploid Apios americana than to breed from triploids. Do a search on Google or such. They are out there.
One might be able to double triploid Apios americana plants to get hexaploids, which might be fertile. Doubling chromosomes takes time and study, and not all hexaploids are fertile. And chemicals that can double chromosomes are at least somewhat toxic, most are very toxic.
Look for seeds.
|
|
|
|
Post by czech on Sept 19, 2017 14:17:01 GMT -5
Thank you, I'am going to procure diploid american groundnuts.🖒
|
|
