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Author Topic: Oroblanco  (Read 608 times)

lebmung

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Re: Oroblanco
« Reply #25 on: November 05, 2018, 04:17:48 AM »


Your plant, immediately need Mg and more N. Check your water it might be very alkaline.

Millet

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Re: Oroblanco
« Reply #26 on: November 05, 2018, 10:15:07 AM »
I don't see a magnesium problem, but as Lemung wrote, it is badly in need of nitrogen.

lebmung

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Re: Oroblanco
« Reply #27 on: November 05, 2018, 10:47:03 AM »
If you zoom in, the 4 lower leaves show the beginning of Mg deficiency. This is because of anion/cation exchange, and Mg blocking by Ca Ón alkaline water.
Also the transparent bottles will bring algae/ moss and root exposure to light. Which in turn will slow down growth.

SoCal2warm

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Re: Oroblanco
« Reply #28 on: November 11, 2018, 12:56:47 AM »
It would be interesting to know the ploidy level.
There's also a small chance the seedling could be tetraploid.
Due to the much lower viability of triploid seed formation (when they are zygotic; this doesn't affect nucellar seed), a substantially greater proportion of the viable sexual gametes are unreduced. An unreduced 3n gamete can then combine with a normal 1n haploid, resulting in a 4n zygote.

There was one study that found a tetraploid in 1 out of 24 Oroblanco seeds.

(The much less common naturally unreduced gametes do not suffer from the triploid viability problems since they never underwent meiosis, that's why their ratio becomes higher among the viable seeds, since there are fewer viable seeds)
« Last Edit: November 11, 2018, 01:03:31 AM by SoCal2warm »

lebmung

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Re: Oroblanco
« Reply #29 on: November 11, 2018, 08:11:53 AM »
How do you test if the seedling is tetraploid?

SoCal2warm

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Re: Oroblanco
« Reply #30 on: November 11, 2018, 04:19:35 PM »
How do you test if the seedling is tetraploid?
There's no easy certain test, but generally the leaves of tetraploids tend to be just a little bit bigger.

You might go find the thread "about how to breed seedless citrus varieties" starting at post number 3. Ilya11 posted some good information.

 

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