gs gene

[darthslater]

How many genes are responsible for striping, is it just gs? Or are there others and in what tomatoes can they be found?

[GunnarSK]

Jan 23, 2011 11:14:24 GMT -5 @darthslater said:

How many genes are responsible for striping, is it just gs? Or are there others and in what tomatoes can they be found?

I think we'd have to ask Tom Wagner (maybe at his own forum), as he's the "father" of Green Zebra and several other striped tomatoes, and I know all of Kozula's striped varieties have their stripes from Copia, which is also based on Green Zebra.

[frogsleapfarm]

Although there are different types of stripes, such as the radial stripes in CP or Aburzini vs the more pronounced stripes in GZ/Wild Boar Farms types - what most folks consider to be "striped tomatoes", appears to be controlled by the recessive gs "green stripe" gene. The striped phenotype appears to be an interaction between gs and several other genes affecting fruit coloration, such as gf, skin color, flesh color, etc. Every year I learn a little more about these different interactions. If there's detailed info out there on this, I haven't found it.

[blane]

so whats the difference between gs and fs genes?

[darthslater]

So, no matter the "color' of the stripes, it is still gs.
Also, some forms of tomatoes such as Violet jasper show indications of metallic striping, some silver.
Is that also considered gs?
I also noted in some of the pics you had Before Mule that the flesh of some anthocyanin strains appeared to be colored as well.
I asked this before but for the sake of others it would be nice to show examples.
Perhaps it was the lighting.

[frogsleapfarm]

Darth - in crosses with VJ/BZ cherry and other metallic striped types - the progeny segregate as expected for gs, with varied striped phenotypes with gs co-segregating with other fruit/skin color genes. In an Aft background anthocyanin preferentially accumulates in the green stripes - very interesting effect.

Jan 23, 2011 14:17:09 GMT -5 @darthslater said:

So, no matter the "color' of the stripes, it is still gs.
Also, some forms of tomatoes such as Violet jasper show indications of metallic striping, some silver.
Is that also considered gs?
I also noted in some of the pics you had Before Mule that the flesh of some anthocyanin strains appeared to be colored as well.
I asked this before but for the sake of others it would be nice to show examples.
Perhaps it was the lighting.

[frogsleapfarm]

Keith - do these spots turn golden, or is this different that the gold fleck/fruit pox trait?

[frogsleapfarm]

Hey, that's my 5th grade photo! Here's an odd one from 2010, a F2 plant from OSU Blue x Beauty King. Darth's nickname "Siberian Tiger". Although I had a striped Aft/gs segregant from this cross, this may be FS (radial stripes) - the next generation will tell. If it is FS, it will still segregate, if gs it won't.

[frogsleapfarm]

whoops, forgot the attachment.

Attachments:

[gobmaters]

I grew a very large F2 population (around 1500 plants) derived from an F1 of Chocolate Stripes x a large- fruited, smooth, pink ,late-blight resistant selection. I selected all combinations of colors and stripes possible in this segregating population. Stripe color on ripe fruit is green only when the gf gene is present in homozygous condition. If gf is not present or is in heterozygous condition, the green stripes turn to yellow in fully ripened fruit. Thus, the red and pink fruit have yellow stripes and the black(chocolate) and purple fruit have green stripes. I did not get any green when ripe fruit segregating in this population since both parents in the F1 cross are homozygous for the gene for red fruit color. However, I know that the stripes on green when ripe fruit remain green as would be expected. Although gs and gf are designated as recessive genes, neither is completely recessive. In heterozygous condition for gs, fruit have a faint green stripe before the fruit ripens. In heterozygous condition for gf , when the gene for red flesh is homozygous, fruit are not red like a normal red tomato but have a very slightly brownish tinge, which I refer to as rusty red. These two genes not being completely recessive is useful for knowing which plants will segregate for fruit color and/or green stripe in the next generation. Also, the green stripes on pink or purple fruit that have the clear skin don't turn yellow as fast as the stripes on yellow skin fruit as the fruit ripens. The pink fruit with the green stripes still showing before the fruit fully ripens is very attractive.

[frogsleapfarm]

That helps Randy, thanks

[blane]

....mass confusion now!....
Im gona take notes.......in the far distant corner of the class....
no futher questions.

[darthslater]

This question is for gobmaters, please tell me if the variegated gene can be controlled, I have some info from people like Keith and Mark, but this tomato really has me obsessed, I love the foliage but the tomato itself is an enigma!!
I would plant 100 of them if I could obtain the stock that would give me the chance for this.

Dean Slater

[hillbillypie]

Jan 23, 2011 20:16:49 GMT -5 gobmaters said:

Stripe color on ripe fruit is green only when the gf gene is present in homozygous condition. If gf is not present or is in heterozygous condition, the green stripes turn to yellow in fully ripened fruit. ...

Has anyone observed different intensities of striping depending on which gf allele is present? For example do the stripes look different if it is gf3 as opposed to gf?

[jcm05]

Jan 23, 2011 22:07:19 GMT -5 @darthslater said:

This question is for gobmaters, please tell me if the variegated gene can be controlled

Dean, this might be a question for a separate, new thread.