Orange Pear tomato

[nicollas]

If i've understood correctly, the dominant B gene will produce orange tomato regardless of alleles at R and Y locus ? If so, it is easy to produce an orange version of any tomatoes by introgressing the B allele in your choosen variety by recurrent backcrossing. It will only take a few plant (at least 4) each year and some hand pollination. Maybe the same is true with Del ?

[Darren Abbey]

Originally Posted by nicollas

If i've understood correctly, the dominant B gene will produce orange tomato regardless of alleles at R and Y locus ? If so, it is easy to produce an orange version of any tomatoes by introgressing the B allele in your choosen variety by recurrent backcrossing. It will only take a few plant (at least 4) each year and some hand pollination. Maybe the same is true with Del ?

There are some interactions between the mutations. The dominant B gene converts lycopene into beta-carotene, so lycopene (red) has to be present. If you have a yellow tomato with the B gene, you might get a subtle shift in the color, but I wouldn't expect it to produce an orange matching that seen with a red genetic background. The Y gene is responsible for yellow-vs-clear skin, so shouldn't impact the B gene products.

It should be easy to select for the presence of B, because it is dominant. But it being dominant may make it hard to select for the absence of the wild-type version of the gene that it can hide. If you're lucky the heterozygous B/b plants will look slightly more red when compared to the homozygous B/B plants.

My impression is that Del (Delta-carotene) produces a red-orange color that is not so distinct, so may take some practice to properly select for.

[nicollas]

Ok so it is better to bred orange B from a red tomato. Should be easy to select homozygous by growing enough plants (at least 4 i guess) for each of the selected orange fruited plants, and keeping groups with all orange fruited plants

[Darren Abbey]

Sounds like a sound plant. I once read the process of using plant families like that to be called "power breeding", as it gives you more power in the breeding process. It lets you isolate homozygous dominant traits faster than you would just by continuously culling the homozygous recessive plants that would crop up. I don't recall where I came across the term, however.

Edit: Apparently the term was coined by Carol Deppe. I found a blog post talking about using the technique in eggplant breeding. (https://toads.wordpress.com/category/eggplant/)

[nicollas]

Yes i think she calls it "power imbreeding"

Originally Posted by Darren Abbey

… There is less-common dominant mutation that results in orange fruit. It is supposed to be present in: "Caro-rich", "Podorok Fei", "Jaune Flammée", "Caro-Red", "Big Orange", and "USDA 97L97". It is probably in a few others, but if your orange variety isn't in this list, you're probably dealing with the tangerine mutation. …

There are two kinds of Big Orange tomatoes, apparently. One is supposed to be a bicolor. I imagine that isn't the one with the Beta Carotene gene. Is the one at Tomatofest the one with the Beta Carotene gene? Or, where is it? How do you know it has the Beta Carotene gene?

[NarnianGarden]

I know this is an older thread, it just came up when I was doing a Google search on Orange Pear tomato.
Just sowed a variety of this name this spring, I hope it is worthwhile

The vendor I purchased it from called it determinate, while another vendor calls it indet.. Any experiences yet anuone?

Andrey..? any reliable knowledge about Grusha Oranzhevaya?

[imp]

http://tatianastomatobase.com/wiki/Aladdin%27s_Lamp

AKA Aladdin's Lamp

[NarnianGarden]

Hmmm. I know about Aladdin's Lamp, but the one I have, seems to be smaller, growing in clusters of cherry size fruits..

[imp]

Originally Posted by NarnianGarden

Hmmm. I know about Aladdin's Lamp, but the one I have, seems to be smaller, growing in clusters of cherry size fruits..

I'd like to ask where you got your seed, as I have a fondness for the necked pear tomatoes and perhaps can purchase the seed that you bought to try it?

That was a convoluted sentence!

[NarnianGarden]

Imp: My seeds were purchased from Nikitovkaseeds via ebay last year (a vendor I find quite reliable, all I ever bought from her was as described) and it's described as det...


Another vendor is Tomato Eden, with slightly different info - claiming that it's indet after all.
http://tomatoeden.com/?593,orange-pear-cherry

[imp]

Thank you!