Author Topic: Green zebra x tomato with green shoulder  (Read 225 times)

Adrian

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Green zebra x tomato with green shoulder
« on: 2021-12-22, 05:02:13 AM »
The stripes of green zebra are well influenced by the gene U?
I understand that the gene U increase the chloroplast rate
The chloroplast is transformed in chromoplast( carotenoid).
What is the effect of U with the production of lycophene and beta carotene?
« Last Edit: 2021-12-22, 07:35:57 AM by Adrian »

Vesa Tee

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Re: Green zebra x tomato with green shoulder
« Reply #1 on: 2021-12-23, 04:22:16 AM »
I would assume that both the green stripes (gs) and the green shoulders (U) would contribute to the carotenoid accumulation. UU+gsgs tomato just looks more intense green and striped.

IDK how much the gs would contribute to the total carotenoids, haven’t seen any studies on it. Below one reference on the contribution of green shoulders.

Quote
U fruit displayed 10-20% increases in soluble solids and carotenoids compared to u fruit


https://ecommons.cornell.edu/handle/1813/39315

Vesa Tee

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Re: Green zebra x tomato with green shoulder
« Reply #2 on: 2021-12-23, 07:57:37 AM »
Here is a picture of an F2 that I consider UU+gsgs. It is clear skin (pink) tomato. One (or both) of the genes could still be heterozygote.
« Last Edit: 2021-12-23, 08:04:43 AM by Vesa Tee »

Adrian

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Re: Green zebra x tomato with green shoulder
« Reply #3 on: 2021-12-23, 01:10:25 PM »
I have the choice between differents varieties
with green shoulder for cross with green zebra
I think the tomato of the third photo has hp-1 or hp-2
Do you think it possible to cumulate U/U gs/gd and hp-1 or 2
« Last Edit: 2021-12-23, 02:50:33 PM by Adrian »

Vesa Tee

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Re: Green zebra x tomato with green shoulder
« Reply #4 on: 2021-12-23, 03:07:07 PM »
Nothing comes to my mind that would prevent having U, gs and high pigment genes in the same plant. You would also have the green flesh gf from green zebra which would probably not increase the carotenoids but would keep the green colour in the ripe fruit. That could be a very pretty tomato.  :)

Adrian

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Re: Green zebra x tomato with green shoulder
« Reply #5 on: 2021-12-28, 01:02:46 PM »
The green shoulder increase also the sugar rate.
I think gs can increase the sugar rate.

The plant of the photo 1 was a low vegetative vigor.
A low vigor or a stress can affected the expression of U/U?
« Last Edit: 2021-12-28, 02:55:46 PM by Adrian »

Vesa Tee

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Re: Green zebra x tomato with green shoulder
« Reply #6 on: 2021-12-28, 11:09:32 PM »
I found the below article interesting when trying to understand what different traits of uniform and green shoulders may contribute. There was a similar discussion in this forum earlier. This study actually did not find evidence to the claim that green shoulder phenotype has always more sugars than the various uniform phenotypes. Based on this study, if we crossed an uniform and a green shoulder, the uniforms may still have in average more sugars in the F2 generation than green shoulders. The situation might change when the cultivars are stable.

https://journals.ashs.org/jashs/view/journals/jashs/142/6/article-p444.xml

One explanation why some green shoulders might be lighter and others darker (as in your pictures 1 and 3) is that those green shoulders are not because of the same UU gene. For example, the above research refers to ”medium green” shoulders which has lighter green shoulders than the wild type green shoulders. Not sure if the plant vigor or stress would explain the lighter green shoulders.
« Last Edit: 2021-12-28, 11:12:50 PM by Vesa Tee »

Adrian

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Re: Green zebra x tomato with green shoulder
« Reply #7 on: 2021-12-29, 05:18:47 AM »
This study is very interested!

I will see this season if the vigor can play on the expression of U/U.
I have cross the tomato of the photo 4 with the tomato of the photo 1 the last season.I will see if the f2 medium green shoulder are more sweets.

The tomato of the photo 1 has a low vigor with leaf of light color and wispy but they have large size.
I think large and thin leafs leaf is good for upgrade photosynthesis.


The tomato of the photo 4 has potato leafs mid dark and thick with a great vigor with a lot of leafs.

I have mainly observed that the stress increase the anthocyan rate on the apical merystem.

I think the F1 will give more large leafs than the two parents.
« Last Edit: 2021-12-29, 01:04:00 PM by Adrian »