Author Topic: Zygotic Poncirus hybrids  (Read 2232 times)

Till

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Re: Zygotic Poncirus hybrids
« Reply #25 on: January 31, 2023, 01:39:45 PM »
There are some in a Japanese genbank called NIAS (https://www.gene.affrc.go.jp/databases-plant_search_char_en.php?type=61). They had some cultivars that were 100% zygotic at least some years ago when I first scanned the genbank.

The existance of zygotic Poncirus hybrids like Phelps and Sanford Citrange also shows that Poncirus has the potential to be 100% zygotic. Nucellar embryony is dominantly inherited so far as I am informed. So if at least these two hybrids are zygotic the cultivar used in creating them must have been heterozygous for nucellar embryony. And that means that its offspring when selfed may be pure zygotic Poncirus.
« Last Edit: January 31, 2023, 01:45:28 PM by Till »

Ilya11

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Re: Zygotic Poncirus hybrids
« Reply #26 on: January 31, 2023, 04:37:56 PM »
Till,
They do not list zygotic seeds, just monoembryonic ones. This is a very different story.
Best regards,
                       Ilya

Till

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Re: Zygotic Poncirus hybrids
« Reply #27 on: February 01, 2023, 12:54:32 PM »
Hmm. I was not careful enough. Thank you for the remark, Ilya.

sc4001992

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Re: Zygotic Poncirus hybrids
« Reply #28 on: February 06, 2023, 01:03:17 PM »
When I transplanted the FD seedlings in my photo above, I did notice many, almost half of the seedlings were poly, more than one stem growing from one seed.

Here's a few photos I took of the poly seeds.Can anyone tell me which one of the poly seedling will be the clone of the parent FD.











« Last Edit: February 06, 2023, 05:52:52 PM by sc4001992 »

Millet

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Re: Zygotic Poncirus hybrids
« Reply #29 on: February 06, 2023, 04:17:05 PM »
Mostly nice seedlings, except for the two shown in picture #3.  Those are called  J roots, and will give the tree continues  problems.   Almost all growers growers toss them out.

sc4001992

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Re: Zygotic Poncirus hybrids
« Reply #30 on: February 06, 2023, 05:54:19 PM »
Is the J root the ones that start curled up then loops downwards?

Millet

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Re: Zygotic Poncirus hybrids
« Reply #31 on: February 07, 2023, 01:13:15 PM »
SC400 yes those are the J rooted seedlings

sc4001992

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Re: Zygotic Poncirus hybrids
« Reply #32 on: February 07, 2023, 01:55:51 PM »
ok, thanks. I have more so I will keep an eye on these and throw out the seedling if the roots grow bad.

mikkel

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Re: Zygotic Poncirus hybrids
« Reply #33 on: February 08, 2023, 04:45:25 PM »
On the other hand weak roots are sometimes correlated with less thorns or precocious flowering. Just in case this is of interest.

sc4001992

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Re: Zygotic Poncirus hybrids
« Reply #34 on: February 08, 2023, 09:46:13 PM »
Yes, that would be neat if there were no thorns on the FD, it hurts when you get hooked.

Citradia

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Re: Zygotic Poncirus hybrids
« Reply #35 on: February 09, 2023, 07:21:36 PM »
So, is the bigger seedling the clone or the little one?

sc4001992

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Re: Zygotic Poncirus hybrids
« Reply #36 on: February 09, 2023, 07:57:54 PM »
That was my question as well. I thought it was the larger one but wanted to hear from the experts who crossbred them.

kumin

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Re: Zygotic Poncirus hybrids
« Reply #37 on: February 10, 2023, 05:35:36 AM »
On occasion the zygotic seedling is more vigorous than the nucellar one(s). Many cultivars essentially produce no viable zygotic embryos. Others produce 100% zygotic embryos. The issue becomes apparent in populations of mixed types. Visual inspection will help find seedlings with identical appearances. These are likely to be nucellar in origin, except in cases where is little genetic variability in both the seed and the pollen parents. Monoembryony is  not always synonymous with zygotic embryony. Seeds may produce a single nucellar embryo.
If the pollen parent shows very distinct characteristics, such as Poncirus does, determining embryonic origin is greatly simplified.

 

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