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Old September 10, 2015   #93
crmauch
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Join Date: May 2013
Location: Honey Brook, PA Zone 6b
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My reading has indicated that Jaune Flamme is not a tangerine variety (which wouldn't have significant Beta-carotene if I understand things)

http://fic.osu.edu/Orchard_OARDC_20141.pdf

Where did you see that Jaune Flamme was a tangerine variety?

I didn't have the impression that beta as an alternate biopath?? I was more under the impression that beta was a further step past lycopene. I'm under the impression that you have to have R in order to get to Beta.

http://frogsleapfarm.blogspot.com/20...-color-in.html

Quote:
Originally Posted by Fusion_power View Post
There are two separate genes involved. One is Tangerine on chromosome 10 in Jaune Flamme.

http://tgrc.ucdavis.edu/Data/Acc/GenDetail.aspx?Gene=t

The other is Beta Carotene on chromosome 6 in 97L97.

http://tgrc.ucdavis.edu/Data/Acc/GenDetail.aspx?Gene=B

The key difference is that Tangerine is from interrupting the lycopene biopath. The tangerine color is from accumulation of prolycopene which gives a rich orange color. When heterozygous with a normal lycopene gene, prolycopene is converted into lycopene which is red. Therefore a cross of Tangerine X Lycopene always produces a red Lycopene fruit.

Beta Carotene is different in that it is a parallel biopath to lycopene. You can get both lycopene and beta carotene into the same plant. Caro Red is just such a plant with both beta carotene and lycopene in the same fruit. The result can vary from pale reddish orange to rich orangish red. Caro Red!
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